[43115] | 1 | // ============================================================================================
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| 2 | /*
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| 3 | * vgabios.c
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| 4 | */
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| 5 | // ============================================================================================
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| 6 | //
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| 7 | // Copyright (C) 2001,2002 the LGPL VGABios developers Team
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| 8 | //
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| 9 | // This library is free software; you can redistribute it and/or
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| 10 | // modify it under the terms of the GNU Lesser General Public
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| 11 | // License as published by the Free Software Foundation; either
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| 12 | // version 2 of the License, or (at your option) any later version.
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| 13 | //
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| 14 | // This library is distributed in the hope that it will be useful,
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| 15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 17 | // Lesser General Public License for more details.
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| 18 | //
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| 19 | // You should have received a copy of the GNU Lesser General Public
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| 20 | // License along with this library; if not, write to the Free Software
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| 21 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 22 | //
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| 23 | // ============================================================================================
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| 24 | //
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| 25 | // This VGA Bios is specific to the plex86/bochs Emulated VGA card.
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| 26 | // You can NOT drive any physical vga card with it.
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| 27 | //
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| 28 | // ============================================================================================
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| 29 | //
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| 30 | // This file contains code ripped from :
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| 31 | // - rombios.c of plex86
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| 32 | //
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| 33 | // This VGA Bios contains fonts from :
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| 34 | // - fntcol16.zip (c) by Joseph Gil avalable at :
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| 35 | // ftp://ftp.simtel.net/pub/simtelnet/msdos/screen/fntcol16.zip
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| 36 | // These fonts are public domain
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| 37 | //
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| 38 | // This VGA Bios is based on information taken from :
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| 39 | // - Kevin Lawton's vga card emulation for bochs/plex86
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| 40 | // - Ralf Brown's interrupts list available at http://www.cs.cmu.edu/afs/cs/user/ralf/pub/WWW/files.html
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| 41 | // - Finn Thogersons' VGADOC4b available at http://home.worldonline.dk/~finth/
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| 42 | // - Michael Abrash's Graphics Programming Black Book
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| 43 | // - Francois Gervais' book "programmation des cartes graphiques cga-ega-vga" edited by sybex
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| 44 | // - DOSEMU 1.0.1 source code for several tables values and formulas
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| 45 | //
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| 46 | // Thanks for patches, comments and ideas to :
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| 47 | // - techt@pikeonline.net
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| 48 | //
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| 49 | // ============================================================================================
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| 50 |
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[43116] | 51 |
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[43115] | 52 | /*
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| 53 | * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
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| 54 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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| 55 | * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
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| 56 | * a choice of LGPL license versions is made available with the language indicating
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| 57 | * that LGPLv2 or any later version may be used, or where a choice of which version
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| 58 | * of the LGPL is applied is otherwise unspecified.
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| 59 | */
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| 60 |
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[43116] | 61 | #include <inttypes.h>
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| 62 | #include "vgabios.h"
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| 63 |
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[43115] | 64 | #ifdef VBE
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| 65 | #include "vbe.h"
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| 66 | #endif
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| 67 |
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| 68 | #include "inlines.h"
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| 69 |
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| 70 | /* Declares */
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| 71 | extern void vgabios_int10_handler(void);
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| 72 | #pragma aux vgabios_int10_handler "*";
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| 73 |
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| 74 | // Output
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[43152] | 75 | void __cdecl unimplemented(void);
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| 76 | void __cdecl unknown(void);
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[43115] | 77 |
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| 78 | static uint8_t find_vga_entry();
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| 79 |
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[83002] | 80 | extern uint8_t readx_byte(uint16_t seg, uint16_t offset);
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[82278] | 81 |
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[43115] | 82 | #ifdef VBE
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| 83 | extern uint16_t __cdecl vbe_has_vbe_display(void);
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[43152] | 84 | extern void vbe_init(void);
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[43115] | 85 | #endif
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| 86 |
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[83002] | 87 | void set_int_vector(uint8_t int_vec, void __far *ptr)
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[43115] | 88 | {
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| 89 | void __far * __far *ivt = 0;
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| 90 |
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[83002] | 91 | ivt[int_vec] = ptr;
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[43115] | 92 | }
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| 93 |
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| 94 | //@todo!!
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| 95 | #if 0
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| 96 |
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| 97 | vgabios_name:
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| 98 | #ifdef VBOX
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| 99 | .ascii "VirtualBox VGA BIOS"
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| 100 | #else
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| 101 | .ascii "Plex86/Bochs VGABios"
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| 102 | #endif
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| 103 | .ascii " "
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| 104 | .byte 0x00
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| 105 |
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| 106 | #ifndef VBOX
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| 107 | vgabios_version:
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| 108 | #ifndef VGABIOS_VERS
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| 109 | .ascii "current-cvs"
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| 110 | #else
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| 111 | .ascii VGABIOS_VERS
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| 112 | #endif
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| 113 | .ascii " "
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| 114 |
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| 115 | vgabios_date:
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| 116 | .ascii VGABIOS_DATE
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| 117 | .byte 0x0a,0x0d
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| 118 | .byte 0x00
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| 119 | #endif
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| 120 |
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| 121 | #ifndef VBOX
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| 122 | char vgabios_copyright[] = "(C) 2003 the LGPL VGABios developers Team\r\n";
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| 123 | char vgabios_license[] = "This VGA/VBE Bios is released under the GNU LGPL\r\n\r\n";
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| 124 | char vgabios_website[] = "Please visit :\r\n" \
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| 125 | " . http://www.plex86.org\r\n" \
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| 126 | " . http://bochs.sourceforge.net\r\n" \
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| 127 | " . http://www.nongnu.org/vgabios\r\n\r\n"
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| 128 | #endif
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| 129 |
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| 130 | #endif
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| 131 |
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| 132 | extern void set_mode(int mode);
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| 133 | #pragma aux set_mode = \
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| 134 | "xor ah, ah" \
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| 135 | "int 10h" \
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| 136 | parm [ax];
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| 137 |
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| 138 | char msg_vga_init[] = "Oracle VM VirtualBox Version " VBOX_VERSION_STRING " VGA BIOS\r\n";
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| 139 |
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| 140 | /*
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| 141 | * Boot time harware inits
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| 142 | */
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| 143 | void init_vga_card(void)
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| 144 | {
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| 145 | /* Switch to color mode and enable CPU access 480 lines. */
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| 146 | outb(0x3C2, 0xC3);
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| 147 | /* More than 64k 3C4/04. */
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[63562] | 148 | /// @todo 16-bit write
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[43115] | 149 | outb(0x3C4, 0x04);
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| 150 | outb(0x3C5, 0x02);
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| 151 |
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[43152] | 152 | #ifdef DEBUG_VGA
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[43115] | 153 | printf(msg_vga_init);
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[43152] | 154 | #endif
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[43115] | 155 | }
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| 156 |
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| 157 | #include "vgatables.h"
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| 158 | #include "vgadefs.h"
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| 159 |
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| 160 | // --------------------------------------------------------------------------------------------
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| 161 |
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[93841] | 162 | #pragma pack(0)
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[43115] | 163 |
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[93841] | 164 | /* Alphanumeric character set override. */
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| 165 | typedef struct {
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| 166 | uint8_t c_height; /* Bytes/lines per character. */
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| 167 | uint8_t cgen_bank; /* Character generator bank. */
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| 168 | uint16_t char_num; /* Number of chars defined. */
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| 169 | uint16_t char_1st; /* First char code in table. */
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| 170 | uint16_t font_ofs; /* Font definition table offset. */
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| 171 | uint16_t font_seg; /* Font definition table segment. */
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| 172 | uint8_t n_rows; /* Number of text rows shown. */
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| 173 | uint8_t modes[1]; /* Applicable modes list, 0xFF terminated. */
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| 174 | } cso_txt;
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[43115] | 175 |
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[93841] | 176 | /* Graphics character set override. */
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| 177 | typedef struct {
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| 178 | uint8_t c_height; /* Lines per character. */
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| 179 | uint16_t c_len; /* Bytes per character. */
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| 180 | uint16_t font_ofs; /* Font definition table offset. */
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| 181 | uint16_t font_seg; /* Font definition table segment. */
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| 182 | uint8_t modes[1]; /* Applicable modes list, 0xFF terminated. */
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| 183 | } cso_grf;
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[43115] | 184 |
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[53099] | 185 | struct dcc {
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| 186 | uint8_t n_ent;
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| 187 | uint8_t version;
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| 188 | uint8_t max_code;
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| 189 | uint8_t reserved;
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| 190 | uint16_t dccs[16];
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| 191 | } dcc_table = {
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| 192 | 16,
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| 193 | 1,
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| 194 | 7,
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| 195 | 0
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| 196 | };
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| 197 |
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| 198 | struct ssa {
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| 199 | uint16_t size;
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| 200 | void __far *dcc;
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| 201 | void __far *sacs;
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| 202 | void __far *pal;
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| 203 | void __far *resvd[3];
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| 204 |
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| 205 | } secondary_save_area = {
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| 206 | sizeof(struct ssa),
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| 207 | &dcc_table
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| 208 | };
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| 209 |
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[43115] | 210 | void __far *video_save_pointer_table[7] = {
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[53099] | 211 | &video_param_table,
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| 212 | 0,
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| 213 | 0,
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| 214 | 0,
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| 215 | &secondary_save_area
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[43115] | 216 | };
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| 217 |
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[93841] | 218 | /*
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| 219 | * Boot time bios area inits
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| 220 | */
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| 221 | void init_bios_area(void)
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| 222 | {
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| 223 | uint8_t __far *bda;
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| 224 |
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| 225 | bda = 0x40 :> 0;
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| 226 |
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| 227 | /* Indicate 80x25 color was detected. */
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| 228 | bda[BIOSMEM_INITIAL_MODE] = (bda[BIOSMEM_INITIAL_MODE] & 0xcf) | 0x20;
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| 229 | /* Just for the first int10 find its children. */
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| 230 |
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| 231 | /* The default char height. */
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| 232 | bda[BIOSMEM_CHAR_HEIGHT] = 16;
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| 233 | /* Clear the screen. */
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| 234 | bda[BIOSMEM_VIDEO_CTL] = 0x60;
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| 235 | /* Set the basic screen we have. */
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| 236 | bda[BIOSMEM_SWITCHES] = 0xf9;
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| 237 | /* Set the basic mode set options. */
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| 238 | bda[BIOSMEM_MODESET_CTL] = 0x51;
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| 239 | /* Set the default MSR. */
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| 240 | bda[BIOSMEM_CURRENT_MSR] = 0x09;
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| 241 | /* Initialize the default save area pointer. */
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| 242 | *(void __far * __far *)&bda[BIOSMEM_VS_POINTER] = video_save_pointer_table;
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| 243 | }
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| 244 |
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[43115] | 245 | // ============================================================================================
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| 246 | //
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| 247 | // Init Entry point
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| 248 | //
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| 249 | // ============================================================================================
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| 250 | void __far __cdecl vgabios_init_func(void)
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| 251 | {
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| 252 | init_vga_card();
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| 253 | init_bios_area();
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| 254 | #ifdef VBE
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| 255 | vbe_init();
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| 256 | #endif
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| 257 | set_int_vector(0x10, vgabios_int10_handler);
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[83001] | 258 | set_int_vector(0x6D, vgabios_int10_handler);
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[43115] | 259 | #ifdef CIRRUS
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| 260 | cirrus_init();
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| 261 | #endif
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| 262 |
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| 263 | #ifndef VBOX
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| 264 | display_splash_screen();
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| 265 |
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| 266 | // init video mode and clear the screen
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| 267 | // @@AS: Do not remove this init, because it will break VESA graphics
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| 268 | set_mode(3);
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| 269 |
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| 270 | display_info();
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| 271 |
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| 272 | #ifdef VBE
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| 273 | vbe_display_info();
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| 274 | #endif
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| 275 |
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| 276 | #ifdef CIRRUS
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| 277 | cirrus_display_info();
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| 278 | #endif
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| 279 |
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| 280 | #else /* VBOX */
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| 281 |
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| 282 | //#ifdef DEBUG_bird
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| 283 | /* Init video mode and clear the screen */
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| 284 | set_mode(3);
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| 285 | //#endif
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| 286 | #endif /* VBOX */
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| 287 | }
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| 288 |
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| 289 | #include "vgafonts.h"
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| 290 |
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| 291 | #ifndef VBOX
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| 292 | // --------------------------------------------------------------------------------------------
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| 293 | /*
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| 294 | * Boot time Splash screen
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| 295 | */
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| 296 | static void display_splash_screen()
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| 297 | {
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| 298 | }
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| 299 |
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| 300 | // --------------------------------------------------------------------------------------------
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| 301 | /*
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| 302 | * Tell who we are
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| 303 | */
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| 304 |
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| 305 | static void display_string(void)
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| 306 | {
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| 307 | // Get length of string
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| 308 | ASM_START
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| 309 | mov ax,ds
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| 310 | mov es,ax
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| 311 | mov di,si
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| 312 | xor cx,cx
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| 313 | not cx
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| 314 | xor al,al
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| 315 | cld
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| 316 | repne
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| 317 | scasb
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| 318 | not cx
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| 319 | dec cx
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| 320 | push cx
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| 321 |
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| 322 | mov ax,#0x0300
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| 323 | mov bx,#0x0000
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| 324 | int #0x10
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| 325 |
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| 326 | pop cx
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| 327 | mov ax,#0x1301
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| 328 | mov bx,#0x000b
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| 329 | mov bp,si
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| 330 | int #0x10
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| 331 | ASM_END
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| 332 | }
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| 333 |
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| 334 | static void display_info(void)
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| 335 | {
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| 336 | display_string(vgabios_name);
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| 337 | display_string(vgabios_version);
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| 338 | display_string(vgabios_copyright);
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| 339 | display_string(vgabios_license);
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| 340 | display_string(vgabios_website);
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| 341 | }
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| 342 |
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| 343 | #endif
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| 344 |
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| 345 | // --------------------------------------------------------------------------------------------
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| 346 | #ifdef VGA_DEBUG
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[43152] | 347 | void __cdecl int10_debugmsg(uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP, uint16_t BX,
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| 348 | uint16_t DX, uint16_t CX, uint16_t AX, uint16_t DS, uint16_t ES, uint16_t FLAGS)
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[43115] | 349 | {
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| 350 | /* Function 0Eh is write char and would generate way too much output. */
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| 351 | if (GET_AH() != 0x0E)
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| 352 | printf("vgabios call ah%02x al%02x bx%04x cx%04x dx%04x\n", GET_AH(), GET_AL(), BX, CX, DX);
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| 353 | }
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| 354 | #endif
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| 355 |
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| 356 | static void vga_get_cursor_pos(uint8_t page, uint16_t STACK_BASED *scans, uint16_t STACK_BASED *loc)
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| 357 | {
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| 358 | if (page > 7) {
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| 359 | *scans = 0;
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| 360 | *loc = 0;
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| 361 | } else {
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| 362 | // FIXME should handle VGA 14/16 lines
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| 363 | *scans = read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE);
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| 364 | *loc = read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_POS + page * 2);
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| 365 | }
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| 366 | }
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| 367 |
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[82246] | 368 | /* Look for a glyph bitmap in a given font. */
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| 369 | static uint16_t vga_find_glyph(uint8_t __far *font, uint8_t STACK_BASED *glyph, uint8_t cp, uint16_t n_glyphs, uint8_t cheight)
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| 370 | {
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| 371 | uint16_t codepoint = 0; /* Zero returned when glyph not found. */
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[43115] | 372 |
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[82246] | 373 | while (n_glyphs--) {
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| 374 | if (!repe_cmpsb(font, glyph, cheight)) {
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| 375 | codepoint = cp | 0x8000; /* Found matching glyph! */
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| 376 | break;
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| 377 | }
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| 378 | font += cheight;
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| 379 | ++cp; /* Increment code point number. */
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| 380 | }
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| 381 | return codepoint;
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| 382 | }
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| 383 |
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| 384 | static void vga_read_glyph_planar(uint8_t __far *vptr, uint16_t stride, uint8_t STACK_BASED *glyph, uint8_t cheight)
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| 385 | {
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| 386 | /* Set Mode Register (GR5) to Read Mode 1. Assuming default register
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| 387 | * state from our mode set, this does all the hard work for us such that
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| 388 | * reading a byte from video memory gives us a bit mask for all eight
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| 389 | * pixels, for both 16-color and monochrome modes.
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| 390 | */
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| 391 | outw(VGAREG_GRDC_ADDRESS, 0x0805);
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| 392 |
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| 393 | while (cheight--) {
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| 394 | *glyph++ = ~*vptr;
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| 395 | vptr += stride;
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| 396 | }
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| 397 |
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| 398 | /* Put GR5 back to Read Mode 0. */
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| 399 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
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| 400 | }
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| 401 |
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| 402 | static uint16_t vga_char_ofs_planar(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols, uint8_t page, uint8_t cheight)
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| 403 | {
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| 404 | uint16_t ofs;
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| 405 |
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| 406 | ofs = ycurs * nbcols * cheight + xcurs;
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| 407 | ofs += page * read_word(BIOSMEM_SEG, BIOSMEM_PAGE_SIZE);
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| 408 |
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| 409 | return ofs;
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| 410 | }
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| 411 |
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| 412 | static uint8_t vga_read_char_planar(uint16_t nbcols, uint16_t ofs, uint8_t cheight)
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| 413 | {
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| 414 | uint8_t glyph[16]; /* NB: Don't try taller characters! */
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| 415 |
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| 416 | vga_read_glyph_planar(0xA000 :> (uint8_t *)ofs, nbcols, &glyph, cheight);
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| 417 |
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| 418 | /* Look through font pointed to by INT 43h. */
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| 419 | return vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 256, cheight);
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| 420 | }
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| 421 |
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| 422 | static uint16_t vga_char_ofs_linear(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols, uint8_t page, uint8_t cheight)
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| 423 | {
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| 424 | uint16_t ofs;
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| 425 |
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| 426 | ofs = ycurs * nbcols * cheight + xcurs;
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| 427 | ofs *= 8;
|
---|
| 428 | return ofs;
|
---|
| 429 | }
|
---|
| 430 |
|
---|
| 431 | static void vga_read_glyph_linear(uint8_t __far *vptr, uint16_t stride, uint8_t STACK_BASED *glyph, uint8_t cheight)
|
---|
| 432 | {
|
---|
| 433 | uint8_t bmap, cbit;
|
---|
| 434 | int i;
|
---|
| 435 |
|
---|
| 436 | /* Zero pixels are background, everything else foreground. */
|
---|
| 437 | while (cheight--) {
|
---|
| 438 | bmap = 0;
|
---|
| 439 | cbit = 0x80;
|
---|
| 440 | for (i = 0; i < 8; ++i) {
|
---|
| 441 | if (vptr[i])
|
---|
| 442 | bmap |= cbit;
|
---|
| 443 | cbit >>= 1;
|
---|
| 444 | }
|
---|
| 445 | *glyph++ = bmap;
|
---|
| 446 | vptr += stride;
|
---|
| 447 | }
|
---|
| 448 | }
|
---|
| 449 |
|
---|
| 450 | static uint8_t vga_read_char_linear(uint16_t nbcols, uint16_t ofs, uint8_t cheight)
|
---|
| 451 | {
|
---|
| 452 | uint8_t glyph[16]; /* NB: Don't try taller characters! */
|
---|
| 453 |
|
---|
| 454 | vga_read_glyph_linear(0xA000 :> (uint8_t *)ofs, nbcols * 8, &glyph, cheight);
|
---|
| 455 |
|
---|
| 456 | /* Look through font pointed to by INT 43h. */
|
---|
| 457 | return vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 256, cheight);
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | static uint8_t vga_read_2bpp_char(uint8_t __far *vptr)
|
---|
| 461 | {
|
---|
| 462 | uint16_t mask, pixb;
|
---|
| 463 | uint8_t bmap, cbit;
|
---|
| 464 | int i;
|
---|
| 465 |
|
---|
| 466 | mask = 0xC000; /* Check two bits at a time to see if they're zero. */
|
---|
| 467 | cbit = 0x80; /* Go from left to right. */
|
---|
| 468 | bmap = 0;
|
---|
| 469 | pixb = swap_16(*((uint16_t __far *)vptr));
|
---|
| 470 | /* Go through 8 lines/words. */
|
---|
| 471 | for (i = 0; i < 8; ++i) {
|
---|
| 472 | if (pixb & mask)
|
---|
| 473 | bmap |= cbit;
|
---|
| 474 | cbit >>= 1;
|
---|
| 475 | mask >>= 2;
|
---|
| 476 | }
|
---|
| 477 | return bmap;
|
---|
| 478 | }
|
---|
| 479 |
|
---|
| 480 | static void vga_read_glyph_cga(uint16_t ofs, uint8_t STACK_BASED *glyph, uint8_t mode)
|
---|
| 481 | {
|
---|
| 482 | int i;
|
---|
| 483 | uint8_t __far *vptr;
|
---|
| 484 |
|
---|
| 485 | /* The font size is fixed at 8x8. Stride is always 80 bytes because the
|
---|
| 486 | * mode is either 80 characters wide at 1bpp or 40 characters at 2bpp.
|
---|
| 487 | */
|
---|
| 488 | if (mode != 6) {
|
---|
| 489 | /* Adjust offset for 2bpp. */
|
---|
| 490 | vptr = 0xB800 :> (uint8_t *)(ofs * 2);
|
---|
| 491 | /* For 2bpp modes, we have to extract the bits by hand. */
|
---|
| 492 | for (i = 0; i < 4; ++i) {
|
---|
| 493 | *glyph++ = vga_read_2bpp_char(vptr);
|
---|
| 494 | *glyph++ = vga_read_2bpp_char(vptr + 0x2000);
|
---|
| 495 | vptr += 80;
|
---|
| 496 | }
|
---|
| 497 | } else {
|
---|
| 498 | vptr = 0xB800 :> (uint8_t *)ofs;
|
---|
| 499 | for (i = 0; i < 4; ++i) {
|
---|
| 500 | *glyph++ = vptr[0];
|
---|
| 501 | *glyph++ = vptr[0x2000];
|
---|
| 502 | vptr += 80;
|
---|
| 503 | }
|
---|
| 504 | }
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | static uint16_t vga_char_ofs_cga(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols)
|
---|
| 508 | {
|
---|
| 509 | /* Multiply ony by 8 due to line interleaving. NB: Caller
|
---|
| 510 | * has to multiply the result for two for 2bpp mode.
|
---|
| 511 | */
|
---|
| 512 | return ycurs * nbcols * 4 + xcurs;
|
---|
| 513 | }
|
---|
| 514 |
|
---|
| 515 | static uint8_t vga_read_char_cga(uint16_t ofs, uint8_t mode)
|
---|
| 516 | {
|
---|
| 517 | uint8_t glyph[8]; /* Char height is hardcoded to 8. */
|
---|
| 518 | uint16_t found;
|
---|
| 519 |
|
---|
| 520 | /* Segment would be B000h for mono modes; we don't do those. */
|
---|
| 521 | vga_read_glyph_cga(ofs, &glyph, mode);
|
---|
| 522 |
|
---|
| 523 | /* Look through the first half of the font pointed to by INT 43h. */
|
---|
| 524 | found = vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 128, 8);
|
---|
| 525 | /* If not found, look for the second half pointed to by INT 1Fh */
|
---|
| 526 | if (!(found & 0x8000)) {
|
---|
| 527 | void __far *int1f;
|
---|
| 528 |
|
---|
| 529 | int1f = (void __far *)read_dword(0, 0x1f * 4);
|
---|
| 530 | if (int1f) /* If null pointer, skip. */
|
---|
| 531 | found = vga_find_glyph(int1f, &glyph, 128, 128, 8);
|
---|
| 532 | }
|
---|
| 533 | return found;
|
---|
| 534 | }
|
---|
| 535 |
|
---|
[43115] | 536 | static void vga_read_char_attr(uint8_t page, uint16_t STACK_BASED *chr_atr)
|
---|
| 537 | {
|
---|
[82246] | 538 | uint8_t xcurs, ycurs, mode, line, cheight;
|
---|
[43115] | 539 | uint16_t nbcols, nbrows, address;
|
---|
[82246] | 540 | uint16_t cursor, dummy, ofs;
|
---|
[43115] | 541 |
|
---|
| 542 | // Get the mode
|
---|
| 543 | mode = read_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MODE);
|
---|
| 544 | line = find_vga_entry(mode);
|
---|
| 545 | if (line == 0xFF)
|
---|
| 546 | return;
|
---|
| 547 |
|
---|
| 548 | // Get the cursor pos for the page
|
---|
| 549 | vga_get_cursor_pos(page, &dummy, &cursor);
|
---|
| 550 | xcurs = cursor & 0x00ff;
|
---|
| 551 | ycurs = (cursor & 0xff00) >> 8;
|
---|
| 552 |
|
---|
| 553 | // Get the dimensions
|
---|
| 554 | nbrows = read_byte(BIOSMEM_SEG, BIOSMEM_NB_ROWS) + 1;
|
---|
| 555 | nbcols = read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS);
|
---|
| 556 |
|
---|
| 557 | if (vga_modes[line].class == TEXT) {
|
---|
| 558 | // Compute the address
|
---|
| 559 | address = SCREEN_MEM_START(nbcols, nbrows, page) + (xcurs + ycurs * nbcols) * 2;
|
---|
| 560 | *chr_atr = read_word(vga_modes[line].sstart, address);
|
---|
| 561 | } else {
|
---|
[82246] | 562 | switch (vga_modes[line].memmodel) {
|
---|
| 563 | case CGA:
|
---|
| 564 | /* For CGA graphics, font size is hardcoded at 8x8. */
|
---|
| 565 | ofs = vga_char_ofs_cga(xcurs, ycurs, nbcols);
|
---|
| 566 | *chr_atr = vga_read_char_cga(ofs, mode);
|
---|
| 567 | break;
|
---|
| 568 | case PLANAR1:
|
---|
| 569 | case PLANAR4:
|
---|
| 570 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
| 571 | ofs = vga_char_ofs_planar(xcurs, ycurs, nbcols, page, cheight);
|
---|
| 572 | *chr_atr = vga_read_char_planar(nbcols, ofs, cheight);
|
---|
| 573 | break;
|
---|
| 574 | case LINEAR8:
|
---|
| 575 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
| 576 | ofs = vga_char_ofs_linear(xcurs, ycurs, nbcols, page, cheight);
|
---|
| 577 | *chr_atr = vga_read_char_linear(nbcols, ofs, cheight);
|
---|
| 578 | break;
|
---|
| 579 | default:
|
---|
[43115] | 580 | #ifdef VGA_DEBUG
|
---|
[82246] | 581 | unimplemented();
|
---|
[43115] | 582 | #endif
|
---|
[82246] | 583 | break;
|
---|
| 584 | }
|
---|
[43115] | 585 | }
|
---|
| 586 | }
|
---|
| 587 |
|
---|
[43116] | 588 | static void vga_get_font_info (uint16_t func, uint16_t STACK_BASED *u_seg, uint16_t STACK_BASED *u_ofs,
|
---|
[43115] | 589 | uint16_t STACK_BASED *c_height, uint16_t STACK_BASED *max_row)
|
---|
| 590 | {
|
---|
| 591 | void __far *ptr;
|
---|
| 592 |
|
---|
| 593 | switch (func) {
|
---|
| 594 | case 0x00:
|
---|
| 595 | ptr = (void __far *)read_dword(0x00, 0x1f * 4);
|
---|
| 596 | break;
|
---|
| 597 | case 0x01:
|
---|
| 598 | ptr = (void __far *)read_dword(0x00, 0x43 * 4);
|
---|
| 599 | break;
|
---|
| 600 | case 0x02:
|
---|
[83002] | 601 | ptr = vgafont14;
|
---|
[43115] | 602 | break;
|
---|
| 603 | case 0x03:
|
---|
[83002] | 604 | ptr = vgafont8;
|
---|
[43115] | 605 | break;
|
---|
| 606 | case 0x04:
|
---|
[83002] | 607 | ptr = vgafont8 + 128 * 8;
|
---|
[43115] | 608 | break;
|
---|
| 609 | case 0x05:
|
---|
[83002] | 610 | ptr = vgafont14alt;
|
---|
[43115] | 611 | break;
|
---|
| 612 | case 0x06:
|
---|
[83002] | 613 | ptr = vgafont16;
|
---|
[43115] | 614 | break;
|
---|
| 615 | case 0x07:
|
---|
[83002] | 616 | ptr = vgafont16alt;
|
---|
[43115] | 617 | break;
|
---|
| 618 | default:
|
---|
| 619 | #ifdef VGA_DEBUG
|
---|
| 620 | printf("Get font info subfn(%02x) not implemented\n", func);
|
---|
| 621 | #endif
|
---|
| 622 | return;
|
---|
| 623 | }
|
---|
| 624 | /* Split the far pointer and write it back. */
|
---|
| 625 | *u_ofs = (uint16_t)ptr;
|
---|
| 626 | *u_seg = (uint32_t)ptr >> 16;
|
---|
| 627 |
|
---|
| 628 | /* The character height (effectively bytes per glyph). */
|
---|
| 629 | *c_height = read_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
| 630 |
|
---|
| 631 | /* The highest row number. */
|
---|
| 632 | *max_row = read_byte(BIOSMEM_SEG, BIOSMEM_NB_ROWS);
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | static void vga_read_pixel(uint8_t page, uint16_t col, uint16_t row, uint16_t STACK_BASED *pixel)
|
---|
| 636 | {
|
---|
| 637 | uint8_t mode, line, mask, attr, data, i;
|
---|
| 638 | uint16_t addr;
|
---|
| 639 |
|
---|
| 640 | /* Determine current mode characteristics. */
|
---|
| 641 | mode = read_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MODE);
|
---|
| 642 | line = find_vga_entry(mode);
|
---|
| 643 | if (line == 0xFF)
|
---|
| 644 | return;
|
---|
| 645 | if (vga_modes[line].class == TEXT)
|
---|
| 646 | return;
|
---|
| 647 |
|
---|
| 648 | /* Read data depending on memory model. */
|
---|
| 649 | switch (vga_modes[line].memmodel) {
|
---|
| 650 | case PLANAR4:
|
---|
| 651 | case PLANAR1:
|
---|
| 652 | addr = col / 8 + row * read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS);
|
---|
[82150] | 653 | addr += read_word(BIOSMEM_SEG, BIOSMEM_PAGE_SIZE) * page;
|
---|
[43115] | 654 | mask = 0x80 >> (col & 0x07);
|
---|
| 655 | attr = 0x00;
|
---|
| 656 | for (i = 0; i < 4; i++) {
|
---|
| 657 | outw(VGAREG_GRDC_ADDRESS, (i << 8) | 0x04);
|
---|
| 658 | data = read_byte(0xa000,addr) & mask;
|
---|
| 659 | if (data > 0)
|
---|
| 660 | attr |= (0x01 << i);
|
---|
| 661 | }
|
---|
| 662 | break;
|
---|
| 663 | case CGA:
|
---|
[82113] | 664 | addr = (col >> (4 - vga_modes[line].pixbits)) + (row >> 1) * 80;
|
---|
[43115] | 665 | if (row & 1)
|
---|
| 666 | addr += 0x2000;
|
---|
| 667 | data = read_byte(0xb800, addr);
|
---|
| 668 | if (vga_modes[line].pixbits == 2)
|
---|
| 669 | attr = (data >> ((3 - (col & 0x03)) * 2)) & 0x03;
|
---|
| 670 | else
|
---|
| 671 | attr = (data >> (7 - (col & 0x07))) & 0x01;
|
---|
| 672 | break;
|
---|
| 673 | case LINEAR8:
|
---|
| 674 | addr = col + row * (read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS) * 8);
|
---|
| 675 | attr = read_byte(0xa000, addr);
|
---|
| 676 | break;
|
---|
| 677 | default:
|
---|
| 678 | #ifdef VGA_DEBUG
|
---|
| 679 | unimplemented();
|
---|
| 680 | #endif
|
---|
| 681 | attr = 0;
|
---|
| 682 | }
|
---|
| 683 | *(uint8_t STACK_BASED *)pixel = attr;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
| 686 |
|
---|
| 687 |
|
---|
| 688 | // --------------------------------------------------------------------------------------------
|
---|
| 689 | /*static*/ void biosfn_perform_gray_scale_summing(uint16_t start, uint16_t count)
|
---|
| 690 | {uint8_t r,g,b;
|
---|
| 691 | uint16_t i;
|
---|
| 692 | uint16_t index;
|
---|
| 693 |
|
---|
| 694 | inb(VGAREG_ACTL_RESET);
|
---|
| 695 | outb(VGAREG_ACTL_ADDRESS,0x00);
|
---|
| 696 |
|
---|
| 697 | for( index = 0; index < count; index++ )
|
---|
| 698 | {
|
---|
| 699 | // set read address and switch to read mode
|
---|
| 700 | outb(VGAREG_DAC_READ_ADDRESS,start);
|
---|
| 701 | // get 6-bit wide RGB data values
|
---|
| 702 | r=inb( VGAREG_DAC_DATA );
|
---|
| 703 | g=inb( VGAREG_DAC_DATA );
|
---|
| 704 | b=inb( VGAREG_DAC_DATA );
|
---|
| 705 |
|
---|
| 706 | // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
|
---|
| 707 | i = ( ( 77*r + 151*g + 28*b ) + 0x80 ) >> 8;
|
---|
| 708 |
|
---|
| 709 | if(i>0x3f)i=0x3f;
|
---|
| 710 |
|
---|
| 711 | // set write address and switch to write mode
|
---|
| 712 | outb(VGAREG_DAC_WRITE_ADDRESS,start);
|
---|
| 713 | // write new intensity value
|
---|
| 714 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
| 715 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
| 716 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
| 717 | start++;
|
---|
| 718 | }
|
---|
| 719 | inb(VGAREG_ACTL_RESET);
|
---|
| 720 | outb(VGAREG_ACTL_ADDRESS,0x20);
|
---|
| 721 | #ifdef VBOX
|
---|
| 722 | inb(VGAREG_ACTL_RESET);
|
---|
| 723 | #endif /* VBOX */
|
---|
| 724 | }
|
---|
| 725 |
|
---|
| 726 | // --------------------------------------------------------------------------------------------
|
---|
| 727 | static void biosfn_set_cursor_shape(uint8_t CH, uint8_t CL)
|
---|
[82133] | 728 | {
|
---|
| 729 | uint16_t cheight, curs, crtc_addr;
|
---|
| 730 | int cga_emu;
|
---|
[43115] | 731 |
|
---|
[82133] | 732 | /* Unmodified input is stored in the BDA. */
|
---|
| 733 | curs = (CH << 8) + CL;
|
---|
| 734 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_TYPE, curs);
|
---|
[43115] | 735 |
|
---|
[82133] | 736 | /* Check if VGA is active. If not, just write the input to the CRTC. */
|
---|
[82154] | 737 | if (!(read_byte(BIOSMEM_SEG, BIOSMEM_VIDEO_CTL) & 8)) {
|
---|
[82133] | 738 | /* Trying to disable the cursor? */
|
---|
| 739 | if ((CH & 0x60) == 0x20) {
|
---|
| 740 | /* Special IBM-compatible value to turn off cursor. */
|
---|
| 741 | CH = 0x1E;
|
---|
| 742 | CL = 0;
|
---|
| 743 | } else {
|
---|
| 744 | cga_emu = !(read_byte(BIOSMEM_SEG, BIOSMEM_VIDEO_CTL) & 1);
|
---|
[43115] | 745 |
|
---|
[82133] | 746 | /* If CGA cursor emulation is on and this is a text mode, adjust.
|
---|
| 747 | * But if cursor star or end is bigger than 31, don't adjust.
|
---|
| 748 | */
|
---|
[82143] | 749 | /// @todo Figure out if this is a text mode
|
---|
[82133] | 750 | if (cga_emu /* && text mode*/ && (CH < 32) && (CL < 32)) {
|
---|
| 751 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
| 752 |
|
---|
| 753 | /* Is the end lower than start? VGA does not wrap around.*/
|
---|
| 754 | if (CL < CH) {
|
---|
| 755 | /* For zero CL (end), leave values unchanged. */
|
---|
| 756 | if (CL) {
|
---|
| 757 | CH = 0;
|
---|
| 758 | CL = cheight - 1;
|
---|
| 759 | }
|
---|
| 760 | } else {
|
---|
| 761 | if (((CL | CH) >= cheight) || ((CL != cheight - 1) && (CH != cheight - 2))) {
|
---|
| 762 | /* If it's an overbar cursor, don't adjust. */
|
---|
| 763 | if (CL > 3) {
|
---|
| 764 | if (CL <= CH + 2) {
|
---|
| 765 | /* It's it a normal underline style cursor. */
|
---|
| 766 | CH = CH - CL + cheight - 1;
|
---|
| 767 | CL = cheight - 1;
|
---|
| 768 | if (cheight >= 14) {
|
---|
| 769 | /* Shift up one pixel for normal EGA/VGA fonts. */
|
---|
| 770 | CL--;
|
---|
| 771 | CH--;
|
---|
| 772 | }
|
---|
| 773 | } else if (CH <= 2) {
|
---|
| 774 | /* It's a full block cursor. */
|
---|
| 775 | CL = cheight - 1;
|
---|
| 776 | } else {
|
---|
| 777 | /* It's a half block cursor. */
|
---|
| 778 | CH = cheight / 2;
|
---|
| 779 | CL = cheight - 1;
|
---|
| 780 | }
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
| 783 | }
|
---|
| 784 | }
|
---|
[43115] | 785 | }
|
---|
| 786 | }
|
---|
| 787 |
|
---|
[82133] | 788 | // CTRC regs 0x0a and 0x0b
|
---|
| 789 | crtc_addr = read_word(BIOSMEM_SEG, BIOSMEM_CRTC_ADDRESS);
|
---|
| 790 | outb(crtc_addr, 0x0a);
|
---|
| 791 | outb(crtc_addr + 1, CH);
|
---|
| 792 | outb(crtc_addr, 0x0b);
|
---|
| 793 | outb(crtc_addr + 1 ,CL);
|
---|
[43115] | 794 | }
|
---|
| 795 |
|
---|
| 796 | // --------------------------------------------------------------------------------------------
|
---|
| 797 | static void biosfn_set_cursor_pos (uint8_t page, uint16_t cursor)
|
---|
| 798 | {
|
---|
| 799 | uint8_t xcurs,ycurs,current;
|
---|
| 800 | uint16_t nbcols,nbrows,address,crtc_addr;
|
---|
| 801 |
|
---|
| 802 | // Should not happen...
|
---|
| 803 | if(page>7)return;
|
---|
| 804 |
|
---|
| 805 | // Bios cursor pos
|
---|
| 806 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*page, cursor);
|
---|
| 807 |
|
---|
| 808 | // Set the hardware cursor
|
---|
| 809 | current=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
| 810 | if(page==current)
|
---|
| 811 | {
|
---|
| 812 | // Get the dimensions
|
---|
| 813 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 814 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 815 |
|
---|
| 816 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
| 817 |
|
---|
| 818 | // Calculate the address knowing nbcols nbrows and page num
|
---|
| 819 | address=SCREEN_IO_START(nbcols,nbrows,page)+xcurs+ycurs*nbcols;
|
---|
| 820 |
|
---|
| 821 | // CRTC regs 0x0e and 0x0f
|
---|
| 822 | crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
| 823 | outb(crtc_addr,0x0e);
|
---|
| 824 | outb(crtc_addr+1,(address&0xff00)>>8);
|
---|
| 825 | outb(crtc_addr,0x0f);
|
---|
| 826 | outb(crtc_addr+1,address&0x00ff);
|
---|
| 827 | }
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 | // --------------------------------------------------------------------------------------------
|
---|
| 831 | static void biosfn_set_active_page(uint8_t page)
|
---|
| 832 | {
|
---|
| 833 | uint16_t cursor,dummy,crtc_addr;
|
---|
| 834 | uint16_t nbcols,nbrows,address;
|
---|
| 835 | uint8_t mode,line;
|
---|
| 836 |
|
---|
| 837 | if(page>7)return;
|
---|
| 838 |
|
---|
| 839 | // Get the mode
|
---|
| 840 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 841 | line=find_vga_entry(mode);
|
---|
| 842 | if(line==0xFF)return;
|
---|
| 843 |
|
---|
| 844 | // Get pos curs pos for the right page
|
---|
| 845 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
| 846 |
|
---|
| 847 | if(vga_modes[line].class==TEXT)
|
---|
| 848 | {
|
---|
| 849 | // Get the dimensions
|
---|
| 850 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 851 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 852 |
|
---|
| 853 | // Calculate the address knowing nbcols nbrows and page num
|
---|
| 854 | address=SCREEN_MEM_START(nbcols,nbrows,page);
|
---|
| 855 | write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START,address);
|
---|
| 856 |
|
---|
| 857 | // Start address
|
---|
| 858 | address=SCREEN_IO_START(nbcols,nbrows,page);
|
---|
| 859 | }
|
---|
| 860 | else
|
---|
| 861 | {
|
---|
[82197] | 862 | address = page * video_param_table[line_to_vpti[line]].slength;
|
---|
[43115] | 863 | }
|
---|
| 864 |
|
---|
| 865 | // CRTC regs 0x0c and 0x0d
|
---|
| 866 | crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
| 867 | outb(crtc_addr,0x0c);
|
---|
| 868 | outb(crtc_addr+1,(address&0xff00)>>8);
|
---|
| 869 | outb(crtc_addr,0x0d);
|
---|
| 870 | outb(crtc_addr+1,address&0x00ff);
|
---|
| 871 |
|
---|
| 872 | // And change the BIOS page
|
---|
| 873 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE,page);
|
---|
| 874 |
|
---|
| 875 | #ifdef VGA_DEBUG
|
---|
| 876 | printf("Set active page %02x address %04x\n",page,address);
|
---|
| 877 | #endif
|
---|
| 878 |
|
---|
| 879 | // Display the cursor, now the page is active
|
---|
| 880 | biosfn_set_cursor_pos(page,cursor);
|
---|
| 881 | }
|
---|
| 882 |
|
---|
[93841] | 883 | /// Recursive BIOS invocation, uses vector 6Dh
|
---|
[43115] | 884 | extern void vga_font_set(uint8_t function, uint8_t data);
|
---|
| 885 | #pragma aux vga_font_set = \
|
---|
| 886 | "mov ah, 11h" \
|
---|
[83001] | 887 | "int 6Dh" \
|
---|
[43115] | 888 | parm [al] [bl];
|
---|
| 889 |
|
---|
| 890 | // ============================================================================================
|
---|
| 891 | //
|
---|
| 892 | // BIOS functions
|
---|
| 893 | //
|
---|
| 894 | // ============================================================================================
|
---|
| 895 |
|
---|
[67853] | 896 | /* CGA-compatible MSR (0x3D8) register values for first modes 0-7. */
|
---|
| 897 | uint8_t cga_msr[8] = {
|
---|
| 898 | 0x2C, 0x28, 0x2D, 0x29, 0x2A, 0x2E, 0x1E, 0x29
|
---|
| 899 | };
|
---|
| 900 |
|
---|
[94355] | 901 | /* Convert index in vga_modes[] to index in video_param_table[] for 200-line (CGA) text modes. */
|
---|
| 902 | static int8_t line_to_vpti_200[8] = {
|
---|
| 903 | 0x00, 0x01, 0x02, 0x03, -1, -1, -1, 0x07
|
---|
| 904 | };
|
---|
| 905 |
|
---|
| 906 | /* Same for 350-line (EGA) text modes. */
|
---|
| 907 | static int8_t line_to_vpti_350[8] = {
|
---|
| 908 | 0x13, 0x14, 0x15, 0x16, -1, -1, -1, 0x07
|
---|
| 909 | };
|
---|
| 910 |
|
---|
| 911 | /* Same for 400-line (VGA) text modes. */
|
---|
| 912 | static int8_t line_to_vpti_400[8] = {
|
---|
| 913 | 0x17, 0x17, 0x18, 0x18, -1, -1, -1, 0x19
|
---|
| 914 | };
|
---|
| 915 |
|
---|
| 916 | int find_vpti(uint8_t line)
|
---|
| 917 | {
|
---|
| 918 | int idx;
|
---|
| 919 | uint8_t mctl;
|
---|
| 920 |
|
---|
| 921 | if (vga_modes[line].class == TEXT) {
|
---|
| 922 | mctl = read_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL);
|
---|
| 923 | if (mctl & 0x10)
|
---|
| 924 | idx = line_to_vpti_400[line];
|
---|
| 925 | else if (mctl & 0x80)
|
---|
| 926 | idx = line_to_vpti_200[line];
|
---|
| 927 | else
|
---|
| 928 | idx = line_to_vpti_350[line];
|
---|
| 929 | } else
|
---|
| 930 | idx = line_to_vpti[line];
|
---|
| 931 |
|
---|
| 932 | return idx;
|
---|
| 933 | }
|
---|
| 934 |
|
---|
[93841] | 935 | static void biosfn_load_text_user_pat(uint8_t AL, uint16_t ES, uint16_t BP, uint16_t CX, uint16_t DX, uint8_t BL, uint8_t BH);
|
---|
[97651] | 936 | static void load_text_patch(uint16_t ES, uint16_t BP, uint8_t BL, uint8_t BH);
|
---|
[93841] | 937 |
|
---|
[43115] | 938 | void biosfn_set_video_mode(uint8_t mode)
|
---|
| 939 | {// mode: Bit 7 is 1 if no clear screen
|
---|
| 940 |
|
---|
| 941 | // Should we clear the screen ?
|
---|
| 942 | uint8_t noclearmem=mode&0x80;
|
---|
[83002] | 943 | uint8_t line,mmask,vpti;
|
---|
| 944 | uint8_t modeset_ctl;
|
---|
| 945 | uint8_t *palette;
|
---|
| 946 | uint16_t i;
|
---|
[43115] | 947 | uint16_t crtc_addr;
|
---|
[93841] | 948 | void __far * __far *save_area;
|
---|
| 949 | VideoParamTableEntry __far *vpt;
|
---|
[43115] | 950 |
|
---|
| 951 | #ifdef VBE
|
---|
| 952 | if (vbe_has_vbe_display()) {
|
---|
| 953 | // Force controller into VGA mode
|
---|
| 954 | outb(VGAREG_SEQU_ADDRESS,7);
|
---|
| 955 | outb(VGAREG_SEQU_DATA,0x00);
|
---|
| 956 | }
|
---|
| 957 | #endif // def VBE
|
---|
| 958 |
|
---|
| 959 | // The real mode
|
---|
| 960 | mode=mode&0x7f;
|
---|
| 961 |
|
---|
[93841] | 962 | // Display switching is not supported; mono monitors aren't really either,
|
---|
| 963 | // but requests to set mode 7 are honored.
|
---|
[51154] | 964 |
|
---|
[43115] | 965 | // find the entry in the video modes
|
---|
| 966 | line=find_vga_entry(mode);
|
---|
| 967 |
|
---|
| 968 | #ifdef VGA_DEBUG
|
---|
| 969 | printf("mode search %02x found line %02x\n",mode,line);
|
---|
| 970 | #endif
|
---|
| 971 |
|
---|
| 972 | if(line==0xFF)
|
---|
| 973 | return;
|
---|
| 974 |
|
---|
[93841] | 975 | // Read the save area pointer.
|
---|
| 976 | save_area = (void __far *)read_dword(BIOSMEM_SEG, BIOSMEM_VS_POINTER);
|
---|
| 977 |
|
---|
[94355] | 978 | vpti = find_vpti(line);
|
---|
| 979 | vpt = save_area[0];
|
---|
[93841] | 980 | vpt += vpti;
|
---|
[43115] | 981 |
|
---|
[83002] | 982 | #if 0 // These are unused, but perhaps they shouldn't be?
|
---|
[43115] | 983 | // Read the bios vga control
|
---|
| 984 | video_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL);
|
---|
| 985 |
|
---|
| 986 | // Read the bios vga switches
|
---|
| 987 | vga_switches=read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES);
|
---|
[83002] | 988 | #endif
|
---|
[43115] | 989 |
|
---|
| 990 | // Read the bios mode set control
|
---|
| 991 | modeset_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL);
|
---|
| 992 |
|
---|
| 993 | // Then we know the number of lines
|
---|
| 994 | // FIXME
|
---|
| 995 |
|
---|
| 996 | // if palette loading (bit 3 of modeset ctl = 0)
|
---|
| 997 | if((modeset_ctl&0x08)==0)
|
---|
| 998 | {// Set the PEL mask
|
---|
| 999 | outb(VGAREG_PEL_MASK,vga_modes[line].pelmask);
|
---|
| 1000 |
|
---|
| 1001 | // Set the whole dac always, from 0
|
---|
| 1002 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
| 1003 |
|
---|
| 1004 | // From which palette
|
---|
| 1005 | switch(vga_modes[line].dacmodel)
|
---|
| 1006 | {case 0:
|
---|
| 1007 | palette=&palette0[0];
|
---|
| 1008 | break;
|
---|
| 1009 | case 1:
|
---|
| 1010 | palette=&palette1[0];
|
---|
| 1011 | break;
|
---|
| 1012 | case 2:
|
---|
| 1013 | palette=&palette2[0];
|
---|
| 1014 | break;
|
---|
| 1015 | case 3:
|
---|
| 1016 | palette=&palette3[0];
|
---|
| 1017 | break;
|
---|
| 1018 | }
|
---|
[94363] | 1019 | // Override for CGA text modes.
|
---|
| 1020 | if(vga_modes[line].class==TEXT)
|
---|
| 1021 | {
|
---|
| 1022 | if(vpt->cheight == 8) // CGA
|
---|
| 1023 | palette=&palette1[0];
|
---|
| 1024 | }
|
---|
[43115] | 1025 | // Always 256*3 values
|
---|
| 1026 | for(i=0;i<0x0100;i++)
|
---|
| 1027 | {if(i<=dac_regs[vga_modes[line].dacmodel])
|
---|
| 1028 | {outb(VGAREG_DAC_DATA,palette[(i*3)+0]);
|
---|
| 1029 | outb(VGAREG_DAC_DATA,palette[(i*3)+1]);
|
---|
| 1030 | outb(VGAREG_DAC_DATA,palette[(i*3)+2]);
|
---|
| 1031 | }
|
---|
| 1032 | else
|
---|
| 1033 | {outb(VGAREG_DAC_DATA,0);
|
---|
| 1034 | outb(VGAREG_DAC_DATA,0);
|
---|
| 1035 | outb(VGAREG_DAC_DATA,0);
|
---|
| 1036 | }
|
---|
| 1037 | }
|
---|
| 1038 | if((modeset_ctl&0x02)==0x02)
|
---|
| 1039 | {
|
---|
| 1040 | biosfn_perform_gray_scale_summing(0x00, 0x100);
|
---|
| 1041 | }
|
---|
| 1042 | }
|
---|
| 1043 |
|
---|
| 1044 | // Reset Attribute Ctl flip-flop
|
---|
| 1045 | inb(VGAREG_ACTL_RESET);
|
---|
| 1046 |
|
---|
| 1047 | // Set Attribute Ctl
|
---|
| 1048 | for(i=0;i<=0x13;i++)
|
---|
| 1049 | {outb(VGAREG_ACTL_ADDRESS,i);
|
---|
[93841] | 1050 | outb(VGAREG_ACTL_WRITE_DATA,vpt->actl_regs[i]);
|
---|
[43115] | 1051 | }
|
---|
| 1052 | outb(VGAREG_ACTL_ADDRESS,0x14);
|
---|
| 1053 | outb(VGAREG_ACTL_WRITE_DATA,0x00);
|
---|
| 1054 |
|
---|
[93841] | 1055 | // Save palette into the save area if it exists.
|
---|
| 1056 | if(save_area[1])
|
---|
| 1057 | {
|
---|
| 1058 | uint8_t __far *dyn_save;
|
---|
| 1059 |
|
---|
| 1060 | dyn_save = save_area[1];
|
---|
| 1061 | for (i = 0; i < 16; ++i)
|
---|
| 1062 | dyn_save[i] = vpt->actl_regs[i];
|
---|
| 1063 | dyn_save[16] = vpt->actl_regs[17];
|
---|
| 1064 | }
|
---|
| 1065 |
|
---|
[43115] | 1066 | // Set Sequencer Ctl
|
---|
| 1067 | outb(VGAREG_SEQU_ADDRESS,0);
|
---|
| 1068 | outb(VGAREG_SEQU_DATA,0x03);
|
---|
| 1069 | for(i=1;i<=4;i++)
|
---|
| 1070 | {outb(VGAREG_SEQU_ADDRESS,i);
|
---|
[93841] | 1071 | outb(VGAREG_SEQU_DATA,vpt->sequ_regs[i - 1]);
|
---|
[43115] | 1072 | }
|
---|
| 1073 |
|
---|
| 1074 | // Set Grafx Ctl
|
---|
| 1075 | for(i=0;i<=8;i++)
|
---|
| 1076 | {outb(VGAREG_GRDC_ADDRESS,i);
|
---|
[93841] | 1077 | outb(VGAREG_GRDC_DATA,vpt->grdc_regs[i]);
|
---|
[43115] | 1078 | }
|
---|
| 1079 |
|
---|
| 1080 | // Set CRTC address VGA or MDA
|
---|
| 1081 | crtc_addr=vga_modes[line].memmodel==MTEXT?VGAREG_MDA_CRTC_ADDRESS:VGAREG_VGA_CRTC_ADDRESS;
|
---|
| 1082 |
|
---|
[93841] | 1083 | // Set the misc register; may change CRTC base!
|
---|
| 1084 | outb(VGAREG_WRITE_MISC_OUTPUT,vpt->miscreg);
|
---|
| 1085 |
|
---|
[43115] | 1086 | // Disable CRTC write protection
|
---|
| 1087 | outw(crtc_addr,0x0011);
|
---|
| 1088 | // Set CRTC regs
|
---|
| 1089 | for(i=0;i<=0x18;i++)
|
---|
| 1090 | {outb(crtc_addr,i);
|
---|
[93841] | 1091 | outb(crtc_addr+1,vpt->crtc_regs[i]);
|
---|
[43115] | 1092 | }
|
---|
| 1093 |
|
---|
| 1094 | // Enable video
|
---|
| 1095 | outb(VGAREG_ACTL_ADDRESS,0x20);
|
---|
[93841] | 1096 | inb(crtc_addr + VGAREG_ACTL_RESET - VGAREG_VGA_CRTC_ADDRESS);
|
---|
[43115] | 1097 |
|
---|
| 1098 | if(noclearmem==0x00)
|
---|
| 1099 | {
|
---|
| 1100 | if(vga_modes[line].class==TEXT)
|
---|
| 1101 | {
|
---|
| 1102 | memsetw(vga_modes[line].sstart,0,0x0720,0x4000); // 32k
|
---|
| 1103 | }
|
---|
| 1104 | else
|
---|
| 1105 | {
|
---|
| 1106 | if(mode<0x0d)
|
---|
| 1107 | {
|
---|
| 1108 | memsetw(vga_modes[line].sstart,0,0x0000,0x4000); // 32k
|
---|
| 1109 | }
|
---|
| 1110 | else
|
---|
| 1111 | {
|
---|
| 1112 | outb( VGAREG_SEQU_ADDRESS, 0x02 );
|
---|
| 1113 | mmask = inb( VGAREG_SEQU_DATA );
|
---|
| 1114 | outb( VGAREG_SEQU_DATA, 0x0f ); // all planes
|
---|
| 1115 | memsetw(vga_modes[line].sstart,0,0x0000,0x8000); // 64k
|
---|
| 1116 | outb( VGAREG_SEQU_DATA, mmask );
|
---|
| 1117 | }
|
---|
| 1118 | }
|
---|
| 1119 | }
|
---|
| 1120 |
|
---|
| 1121 | // Set the BIOS mem
|
---|
| 1122 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE,mode);
|
---|
[93841] | 1123 | write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS,vpt->twidth);
|
---|
| 1124 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE,vpt->slength);
|
---|
[43115] | 1125 | write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS,crtc_addr);
|
---|
[93841] | 1126 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS,vpt->theightm1);
|
---|
| 1127 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,vpt->cheight);
|
---|
[82154] | 1128 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,(0x60|noclearmem));
|
---|
[43115] | 1129 | write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES,0xF9);
|
---|
| 1130 |
|
---|
| 1131 | // FIXME We nearly have the good tables. to be reworked
|
---|
| 1132 | write_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX,0x08); // 8 is VGA should be ok for now
|
---|
[43116] | 1133 |
|
---|
[67853] | 1134 | if (mode <= 7)
|
---|
| 1135 | {
|
---|
| 1136 | write_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MSR, cga_msr[mode]); /* Like CGA reg. 0x3D8 */
|
---|
| 1137 | write_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_PAL, mode == 6 ? 0x3F : 0x30); /* Like CGA reg. 0x3D9*/
|
---|
| 1138 | }
|
---|
[43115] | 1139 |
|
---|
| 1140 | // Set cursor shape
|
---|
| 1141 | if(vga_modes[line].class==TEXT)
|
---|
| 1142 | {
|
---|
| 1143 | biosfn_set_cursor_shape(0x06,0x07);
|
---|
| 1144 | }
|
---|
| 1145 |
|
---|
[93841] | 1146 | /// @todo Could be optimized to a memset since only BDA needs updating.
|
---|
[43115] | 1147 | // Set cursor pos for page 0..7
|
---|
| 1148 | for(i=0;i<8;i++)
|
---|
| 1149 | biosfn_set_cursor_pos(i,0x0000);
|
---|
| 1150 |
|
---|
| 1151 | // Set active page 0
|
---|
| 1152 | biosfn_set_active_page(0x00);
|
---|
| 1153 |
|
---|
| 1154 | // Write the fonts in memory
|
---|
| 1155 | if(vga_modes[line].class==TEXT)
|
---|
| 1156 | {
|
---|
[93841] | 1157 | cso_txt __far *ovr = save_area[2];
|
---|
| 1158 |
|
---|
[94355] | 1159 | switch (vpt->cheight) {
|
---|
| 1160 | case 8:
|
---|
| 1161 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont8, 256, 0, 0, vpt->cheight);
|
---|
| 1162 | break;
|
---|
| 1163 | case 14:
|
---|
| 1164 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont14, 256, 0, 0, vpt->cheight);
|
---|
[97651] | 1165 | if (mode == 7) /* 350-line EGA modes are 640 wide, only mono EGA mode is 720 wide. */
|
---|
| 1166 | load_text_patch(0xC000, (uint16_t)vgafont14alt, 0, 14);
|
---|
[94355] | 1167 | break;
|
---|
| 1168 | default:
|
---|
| 1169 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont16, 256, 0, 0, vpt->cheight);
|
---|
[97651] | 1170 | load_text_patch(0xC000, (uint16_t)vgafont16alt, 0, 16);
|
---|
[94355] | 1171 | }
|
---|
[93841] | 1172 | if (ovr)
|
---|
| 1173 | {
|
---|
| 1174 | #ifdef VGA_DEBUG
|
---|
| 1175 | printf("Charmap override found, font at %04x:%04x\n", ovr->font_seg, ovr->font_ofs);
|
---|
| 1176 | #endif
|
---|
| 1177 | i = 0;
|
---|
| 1178 | // Does the override support current mode?
|
---|
| 1179 | while (ovr->modes[i] != 0xff)
|
---|
| 1180 | {
|
---|
| 1181 | if (ovr->modes[i] == mode)
|
---|
| 1182 | break;
|
---|
| 1183 | ++i;
|
---|
| 1184 | }
|
---|
| 1185 | // If there is a valid font override, apply it.
|
---|
| 1186 | if (ovr->modes[i] == mode)
|
---|
| 1187 | {
|
---|
| 1188 | #ifdef VGA_DEBUG
|
---|
| 1189 | printf("Loading override, %04x chars, height %02x\n", ovr->char_num, ovr->c_height);
|
---|
| 1190 | #endif
|
---|
| 1191 | biosfn_load_text_user_pat(0x10, ovr->font_seg, ovr->font_ofs, ovr->char_num,
|
---|
| 1192 | ovr->char_1st, ovr->cgen_bank, ovr->c_height);
|
---|
| 1193 | }
|
---|
| 1194 | }
|
---|
[83001] | 1195 | vga_font_set(0x03, 0); /* Select font page mode 0. */
|
---|
[43115] | 1196 | }
|
---|
| 1197 |
|
---|
| 1198 | // Set the ints 0x1F and 0x43
|
---|
| 1199 | set_int_vector(0x1f, vgafont8+128*8);
|
---|
| 1200 |
|
---|
[93841] | 1201 | switch(vpt->cheight)
|
---|
[43115] | 1202 | {case 8:
|
---|
| 1203 | set_int_vector(0x43, vgafont8);
|
---|
| 1204 | break;
|
---|
| 1205 | case 14:
|
---|
| 1206 | set_int_vector(0x43, vgafont14);
|
---|
| 1207 | break;
|
---|
| 1208 | case 16:
|
---|
| 1209 | set_int_vector(0x43, vgafont16);
|
---|
| 1210 | break;
|
---|
| 1211 | }
|
---|
| 1212 | }
|
---|
| 1213 |
|
---|
| 1214 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1215 | static void vgamem_copy_pl4(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
[43115] | 1216 | uint8_t cols, uint8_t nbcols, uint8_t cheight)
|
---|
| 1217 | {
|
---|
| 1218 | uint16_t src,dest;
|
---|
| 1219 | uint8_t i;
|
---|
| 1220 |
|
---|
| 1221 | src=ysrc*cheight*nbcols+xstart;
|
---|
| 1222 | dest=ydest*cheight*nbcols+xstart;
|
---|
| 1223 | outw(VGAREG_GRDC_ADDRESS, 0x0105);
|
---|
| 1224 | for(i=0;i<cheight;i++)
|
---|
| 1225 | {
|
---|
| 1226 | memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
|
---|
| 1227 | }
|
---|
| 1228 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1229 | }
|
---|
| 1230 |
|
---|
| 1231 | // --------------------------------------------------------------------------------------------
|
---|
| 1232 | static void vgamem_fill_pl4(uint8_t xstart, uint8_t ystart, uint8_t cols,
|
---|
| 1233 | uint8_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
| 1234 | {
|
---|
| 1235 | uint16_t dest;
|
---|
| 1236 | uint8_t i;
|
---|
| 1237 |
|
---|
| 1238 | dest=ystart*cheight*nbcols+xstart;
|
---|
| 1239 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
| 1240 | for(i=0;i<cheight;i++)
|
---|
| 1241 | {
|
---|
| 1242 | memsetb(0xa000,dest+i*nbcols,attr,cols);
|
---|
| 1243 | }
|
---|
| 1244 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1245 | }
|
---|
| 1246 |
|
---|
| 1247 | // --------------------------------------------------------------------------------------------
|
---|
| 1248 | static void vgamem_copy_cga(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
| 1249 | uint8_t cols, uint8_t nbcols, uint8_t cheight)
|
---|
| 1250 | {
|
---|
| 1251 | uint16_t src,dest;
|
---|
| 1252 | uint8_t i;
|
---|
| 1253 |
|
---|
| 1254 | src=((ysrc*cheight*nbcols)>>1)+xstart;
|
---|
| 1255 | dest=((ydest*cheight*nbcols)>>1)+xstart;
|
---|
[82205] | 1256 | for(i=0;i<cheight/2;i++)
|
---|
[43115] | 1257 | {
|
---|
[82205] | 1258 | memcpyb(0xb800,dest+i*nbcols,0xb800,src+i*nbcols,cols);
|
---|
| 1259 | memcpyb(0xb800,0x2000+dest+i*nbcols,0xb800,0x2000+src+i*nbcols,cols);
|
---|
[43115] | 1260 | }
|
---|
| 1261 | }
|
---|
| 1262 |
|
---|
| 1263 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1264 | static void vgamem_fill_cga(uint8_t xstart, uint8_t ystart, uint8_t cols,
|
---|
[43115] | 1265 | uint8_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
| 1266 | {
|
---|
| 1267 | uint16_t dest;
|
---|
| 1268 | uint8_t i;
|
---|
| 1269 |
|
---|
| 1270 | dest=((ystart*cheight*nbcols)>>1)+xstart;
|
---|
[82205] | 1271 | for(i=0;i<cheight/2;i++)
|
---|
[43115] | 1272 | {
|
---|
[82205] | 1273 | memsetb(0xb800,dest+i*nbcols,attr,cols);
|
---|
| 1274 | memsetb(0xb800,0x2000+dest+i*nbcols,attr,cols);
|
---|
[43115] | 1275 | }
|
---|
| 1276 | }
|
---|
| 1277 |
|
---|
| 1278 | // --------------------------------------------------------------------------------------------
|
---|
[82207] | 1279 | static void vgamem_copy_linear(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
| 1280 | uint16_t cols, uint16_t nbcols, uint8_t cheight)
|
---|
| 1281 | {
|
---|
| 1282 | uint16_t src,dest;
|
---|
| 1283 | uint8_t i;
|
---|
| 1284 |
|
---|
| 1285 | src=((ysrc*cheight*nbcols)+xstart)*8;
|
---|
| 1286 | dest=((ydest*cheight*nbcols)+xstart)*8;
|
---|
| 1287 | cols*=8;
|
---|
| 1288 | nbcols*=8;
|
---|
| 1289 | for(i=0;i<cheight;i++)
|
---|
| 1290 | {
|
---|
| 1291 | memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
|
---|
| 1292 | }
|
---|
| 1293 | }
|
---|
| 1294 |
|
---|
| 1295 | // --------------------------------------------------------------------------------------------
|
---|
| 1296 | static void vgamem_fill_linear(uint8_t xstart, uint8_t ystart, uint16_t cols,
|
---|
| 1297 | uint16_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
| 1298 | {
|
---|
| 1299 | uint16_t dest;
|
---|
| 1300 | uint8_t i;
|
---|
| 1301 |
|
---|
| 1302 | dest=((ystart*cheight*nbcols)+xstart)*8;
|
---|
| 1303 | cols*=8;
|
---|
| 1304 | nbcols*=8;
|
---|
| 1305 | for(i=0;i<cheight;i++)
|
---|
| 1306 | {
|
---|
| 1307 | memsetb(0xa000,dest+i*nbcols,attr,cols);
|
---|
| 1308 | }
|
---|
| 1309 | }
|
---|
| 1310 |
|
---|
| 1311 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1312 | static void biosfn_scroll(uint8_t nblines, uint8_t attr, uint8_t rul, uint8_t cul,
|
---|
[43115] | 1313 | uint8_t rlr, uint8_t clr, uint8_t page, uint8_t dir)
|
---|
| 1314 | {
|
---|
| 1315 | // page == 0xFF if current
|
---|
| 1316 |
|
---|
| 1317 | uint8_t mode,line,cheight,bpp,cols;
|
---|
| 1318 | uint16_t nbcols,nbrows,i;
|
---|
| 1319 | uint16_t address;
|
---|
| 1320 |
|
---|
| 1321 | if(rul>rlr)return;
|
---|
| 1322 | if(cul>clr)return;
|
---|
| 1323 |
|
---|
| 1324 | // Get the mode
|
---|
| 1325 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 1326 | line=find_vga_entry(mode);
|
---|
| 1327 | if(line==0xFF)return;
|
---|
| 1328 |
|
---|
| 1329 | // Get the dimensions
|
---|
| 1330 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 1331 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 1332 |
|
---|
| 1333 | // Get the current page
|
---|
| 1334 | if(page==0xFF)
|
---|
| 1335 | page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
| 1336 |
|
---|
| 1337 | if(rlr>=nbrows)rlr=nbrows-1;
|
---|
| 1338 | if(clr>=nbcols)clr=nbcols-1;
|
---|
| 1339 | if(nblines>nbrows)nblines=0;
|
---|
| 1340 | cols=clr-cul+1;
|
---|
| 1341 |
|
---|
| 1342 | if(vga_modes[line].class==TEXT)
|
---|
| 1343 | {
|
---|
| 1344 | // Compute the address
|
---|
| 1345 | address=SCREEN_MEM_START(nbcols,nbrows,page);
|
---|
| 1346 | #ifdef VGA_DEBUG
|
---|
| 1347 | printf("Scroll, address %04x (%04x %04x %02x)\n",address,nbrows,nbcols,page);
|
---|
| 1348 | #endif
|
---|
| 1349 |
|
---|
| 1350 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
| 1351 | {
|
---|
| 1352 | memsetw(vga_modes[line].sstart,address,(uint16_t)attr*0x100+' ',nbrows*nbcols);
|
---|
| 1353 | }
|
---|
| 1354 | else
|
---|
| 1355 | {// if Scroll up
|
---|
| 1356 | if(dir==SCROLL_UP)
|
---|
| 1357 | {for(i=rul;i<=rlr;i++)
|
---|
| 1358 | {
|
---|
| 1359 | if((i+nblines>rlr)||(nblines==0))
|
---|
| 1360 | memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(uint16_t)attr*0x100+' ',cols);
|
---|
| 1361 | else
|
---|
| 1362 | memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i+nblines)*nbcols+cul)*2,cols);
|
---|
| 1363 | }
|
---|
| 1364 | }
|
---|
| 1365 | else
|
---|
| 1366 | {for(i=rlr;i>=rul;i--)
|
---|
| 1367 | {
|
---|
| 1368 | if((i<rul+nblines)||(nblines==0))
|
---|
| 1369 | memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(uint16_t)attr*0x100+' ',cols);
|
---|
| 1370 | else
|
---|
| 1371 | memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i-nblines)*nbcols+cul)*2,cols);
|
---|
| 1372 | if (i>rlr) break;
|
---|
| 1373 | }
|
---|
| 1374 | }
|
---|
| 1375 | }
|
---|
| 1376 | }
|
---|
| 1377 | else
|
---|
| 1378 | {
|
---|
| 1379 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
| 1380 | switch(vga_modes[line].memmodel)
|
---|
| 1381 | {
|
---|
| 1382 | case PLANAR4:
|
---|
| 1383 | case PLANAR1:
|
---|
| 1384 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
| 1385 | {
|
---|
| 1386 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
| 1387 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight);
|
---|
| 1388 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1389 | }
|
---|
| 1390 | else
|
---|
| 1391 | {// if Scroll up
|
---|
| 1392 | if(dir==SCROLL_UP)
|
---|
| 1393 | {for(i=rul;i<=rlr;i++)
|
---|
| 1394 | {
|
---|
| 1395 | if((i+nblines>rlr)||(nblines==0))
|
---|
| 1396 | vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1397 | else
|
---|
| 1398 | vgamem_copy_pl4(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
| 1399 | }
|
---|
| 1400 | }
|
---|
| 1401 | else
|
---|
| 1402 | {for(i=rlr;i>=rul;i--)
|
---|
| 1403 | {
|
---|
| 1404 | if((i<rul+nblines)||(nblines==0))
|
---|
| 1405 | vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1406 | else
|
---|
[82205] | 1407 | vgamem_copy_pl4(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
[43115] | 1408 | if (i>rlr) break;
|
---|
| 1409 | }
|
---|
| 1410 | }
|
---|
| 1411 | }
|
---|
| 1412 | break;
|
---|
| 1413 | case CGA:
|
---|
| 1414 | bpp=vga_modes[line].pixbits;
|
---|
| 1415 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
| 1416 | {
|
---|
| 1417 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight*bpp);
|
---|
| 1418 | }
|
---|
| 1419 | else
|
---|
| 1420 | {
|
---|
| 1421 | if(bpp==2)
|
---|
| 1422 | {
|
---|
| 1423 | cul<<=1;
|
---|
| 1424 | cols<<=1;
|
---|
| 1425 | nbcols<<=1;
|
---|
| 1426 | }
|
---|
| 1427 | // if Scroll up
|
---|
| 1428 | if(dir==SCROLL_UP)
|
---|
| 1429 | {for(i=rul;i<=rlr;i++)
|
---|
| 1430 | {
|
---|
| 1431 | if((i+nblines>rlr)||(nblines==0))
|
---|
| 1432 | vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1433 | else
|
---|
| 1434 | vgamem_copy_cga(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
| 1435 | }
|
---|
| 1436 | }
|
---|
| 1437 | else
|
---|
| 1438 | {for(i=rlr;i>=rul;i--)
|
---|
| 1439 | {
|
---|
| 1440 | if((i<rul+nblines)||(nblines==0))
|
---|
| 1441 | vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1442 | else
|
---|
[82205] | 1443 | vgamem_copy_cga(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
[43115] | 1444 | if (i>rlr) break;
|
---|
| 1445 | }
|
---|
| 1446 | }
|
---|
| 1447 | }
|
---|
| 1448 | break;
|
---|
[82207] | 1449 | case LINEAR8:
|
---|
| 1450 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
| 1451 | {
|
---|
| 1452 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight*8);
|
---|
| 1453 | }
|
---|
| 1454 | else
|
---|
| 1455 | {
|
---|
| 1456 | // if Scroll up
|
---|
| 1457 | if(dir==SCROLL_UP)
|
---|
| 1458 | {for(i=rul;i<=rlr;i++)
|
---|
| 1459 | {
|
---|
| 1460 | if((i+nblines>rlr)||(nblines==0))
|
---|
| 1461 | vgamem_fill_linear(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1462 | else
|
---|
| 1463 | vgamem_copy_linear(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
| 1464 | }
|
---|
| 1465 | }
|
---|
| 1466 | else
|
---|
| 1467 | {for(i=rlr;i>=rul;i--)
|
---|
| 1468 | {
|
---|
| 1469 | if((i<rul+nblines)||(nblines==0))
|
---|
| 1470 | vgamem_fill_linear(cul,i,cols,nbcols,cheight,attr);
|
---|
| 1471 | else
|
---|
| 1472 | vgamem_copy_linear(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
| 1473 | if (i>rlr) break;
|
---|
| 1474 | }
|
---|
| 1475 | }
|
---|
| 1476 | }
|
---|
| 1477 | break;
|
---|
[43115] | 1478 | #ifdef VGA_DEBUG
|
---|
| 1479 | default:
|
---|
| 1480 | printf("Scroll in graphics mode ");
|
---|
| 1481 | unimplemented();
|
---|
| 1482 | #endif
|
---|
| 1483 | }
|
---|
| 1484 | }
|
---|
| 1485 | }
|
---|
| 1486 |
|
---|
| 1487 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1488 | static void write_gfx_char_pl4(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
[82150] | 1489 | uint8_t ycurs, uint8_t nbcols, uint8_t cheight, uint8_t page)
|
---|
[43115] | 1490 | {
|
---|
| 1491 | uint8_t i,j,mask;
|
---|
[82246] | 1492 | uint8_t __far *fdata;
|
---|
[43115] | 1493 | uint16_t addr,dest,src;
|
---|
| 1494 |
|
---|
[82246] | 1495 | fdata = (void __far *)read_dword(0x00, 0x43 * 4);
|
---|
| 1496 |
|
---|
[43115] | 1497 | addr=xcurs+ycurs*cheight*nbcols;
|
---|
[82150] | 1498 | addr+=read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)*page;
|
---|
[43115] | 1499 | src = car * cheight;
|
---|
| 1500 | outw(VGAREG_SEQU_ADDRESS, 0x0f02);
|
---|
| 1501 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
| 1502 | if(attr&0x80)
|
---|
| 1503 | {
|
---|
| 1504 | outw(VGAREG_GRDC_ADDRESS, 0x1803);
|
---|
| 1505 | }
|
---|
| 1506 | else
|
---|
| 1507 | {
|
---|
| 1508 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
| 1509 | }
|
---|
| 1510 | for(i=0;i<cheight;i++)
|
---|
| 1511 | {
|
---|
| 1512 | dest=addr+i*nbcols;
|
---|
| 1513 | for(j=0;j<8;j++)
|
---|
| 1514 | {
|
---|
| 1515 | mask=0x80>>j;
|
---|
| 1516 | outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
|
---|
[83002] | 1517 | readx_byte(0xa000,dest);
|
---|
[43115] | 1518 | if(fdata[src+i]&mask)
|
---|
| 1519 | {
|
---|
| 1520 | write_byte(0xa000,dest,attr&0x0f);
|
---|
| 1521 | }
|
---|
| 1522 | else
|
---|
| 1523 | {
|
---|
| 1524 | write_byte(0xa000,dest,0x00);
|
---|
| 1525 | }
|
---|
| 1526 | }
|
---|
| 1527 | }
|
---|
| 1528 | outw(VGAREG_GRDC_ADDRESS, 0xff08);
|
---|
| 1529 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1530 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
| 1531 | }
|
---|
| 1532 |
|
---|
| 1533 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1534 | static void write_gfx_char_cga(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
[43115] | 1535 | uint8_t ycurs, uint8_t nbcols, uint8_t bpp)
|
---|
| 1536 | {
|
---|
| 1537 | uint8_t i,j,mask,data;
|
---|
| 1538 | uint8_t *fdata;
|
---|
| 1539 | uint16_t addr,dest,src;
|
---|
| 1540 |
|
---|
| 1541 | fdata = &vgafont8;
|
---|
| 1542 | addr=(xcurs*bpp)+ycurs*320;
|
---|
| 1543 | src = car * 8;
|
---|
| 1544 | for(i=0;i<8;i++)
|
---|
| 1545 | {
|
---|
| 1546 | dest=addr+(i>>1)*80;
|
---|
| 1547 | if (i & 1) dest += 0x2000;
|
---|
| 1548 | mask = 0x80;
|
---|
[82246] | 1549 | /* NB: In 1bpp modes, the attribute is ignored, only the XOR flag has meaning. */
|
---|
[43115] | 1550 | if (bpp == 1)
|
---|
| 1551 | {
|
---|
| 1552 | if (attr & 0x80)
|
---|
| 1553 | {
|
---|
| 1554 | data = read_byte(0xb800,dest);
|
---|
[82246] | 1555 | data ^= fdata[src+i];
|
---|
[43115] | 1556 | }
|
---|
| 1557 | else
|
---|
| 1558 | {
|
---|
[82246] | 1559 | data = fdata[src+i];
|
---|
[43115] | 1560 | }
|
---|
| 1561 | write_byte(0xb800,dest,data);
|
---|
| 1562 | }
|
---|
| 1563 | else
|
---|
| 1564 | {
|
---|
| 1565 | while (mask > 0)
|
---|
| 1566 | {
|
---|
| 1567 | if (attr & 0x80)
|
---|
| 1568 | {
|
---|
| 1569 | data = read_byte(0xb800,dest);
|
---|
| 1570 | }
|
---|
| 1571 | else
|
---|
| 1572 | {
|
---|
| 1573 | data = 0x00;
|
---|
| 1574 | }
|
---|
| 1575 | for(j=0;j<4;j++)
|
---|
| 1576 | {
|
---|
| 1577 | if (fdata[src+i] & mask)
|
---|
| 1578 | {
|
---|
| 1579 | if (attr & 0x80)
|
---|
| 1580 | {
|
---|
| 1581 | data ^= (attr & 0x03) << ((3-j)*2);
|
---|
| 1582 | }
|
---|
| 1583 | else
|
---|
| 1584 | {
|
---|
| 1585 | data |= (attr & 0x03) << ((3-j)*2);
|
---|
| 1586 | }
|
---|
| 1587 | }
|
---|
| 1588 | mask >>= 1;
|
---|
| 1589 | }
|
---|
| 1590 | write_byte(0xb800,dest,data);
|
---|
| 1591 | dest += 1;
|
---|
| 1592 | }
|
---|
| 1593 | }
|
---|
| 1594 | }
|
---|
| 1595 | }
|
---|
| 1596 |
|
---|
| 1597 | // --------------------------------------------------------------------------------------------
|
---|
[43116] | 1598 | static void write_gfx_char_lin(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
[43115] | 1599 | uint8_t ycurs, uint8_t nbcols)
|
---|
| 1600 | {
|
---|
| 1601 | uint8_t i,j,mask,data;
|
---|
| 1602 | uint8_t *fdata;
|
---|
| 1603 | uint16_t addr,dest,src;
|
---|
| 1604 |
|
---|
| 1605 | fdata = &vgafont8;
|
---|
| 1606 | addr=xcurs*8+ycurs*nbcols*64;
|
---|
| 1607 | src = car * 8;
|
---|
| 1608 | for(i=0;i<8;i++)
|
---|
| 1609 | {
|
---|
| 1610 | dest=addr+i*nbcols*8;
|
---|
| 1611 | mask = 0x80;
|
---|
| 1612 | for(j=0;j<8;j++)
|
---|
| 1613 | {
|
---|
| 1614 | data = 0x00;
|
---|
| 1615 | if (fdata[src+i] & mask)
|
---|
| 1616 | {
|
---|
| 1617 | data = attr;
|
---|
| 1618 | }
|
---|
| 1619 | write_byte(0xa000,dest+j,data);
|
---|
| 1620 | mask >>= 1;
|
---|
| 1621 | }
|
---|
| 1622 | }
|
---|
| 1623 | }
|
---|
| 1624 |
|
---|
| 1625 | // --------------------------------------------------------------------------------------------
|
---|
| 1626 | static void biosfn_write_char_attr(uint8_t car, uint8_t page, uint8_t attr, uint16_t count)
|
---|
| 1627 | {
|
---|
| 1628 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
| 1629 | uint16_t nbcols,nbrows,address;
|
---|
| 1630 | uint16_t cursor,dummy;
|
---|
| 1631 |
|
---|
| 1632 | // Get the mode
|
---|
| 1633 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 1634 | line=find_vga_entry(mode);
|
---|
| 1635 | if(line==0xFF)return;
|
---|
| 1636 |
|
---|
| 1637 | // Get the cursor pos for the page
|
---|
| 1638 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
| 1639 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
| 1640 |
|
---|
| 1641 | // Get the dimensions
|
---|
| 1642 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 1643 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 1644 |
|
---|
| 1645 | if(vga_modes[line].class==TEXT)
|
---|
| 1646 | {
|
---|
| 1647 | // Compute the address
|
---|
| 1648 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
| 1649 |
|
---|
| 1650 | dummy=((uint16_t)attr<<8)+car;
|
---|
| 1651 | memsetw(vga_modes[line].sstart,address,dummy,count);
|
---|
| 1652 | }
|
---|
| 1653 | else
|
---|
| 1654 | {
|
---|
| 1655 | // FIXME gfx mode not complete
|
---|
| 1656 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
| 1657 | bpp=vga_modes[line].pixbits;
|
---|
[82246] | 1658 | while(count-->0)
|
---|
[43115] | 1659 | {
|
---|
| 1660 | switch(vga_modes[line].memmodel)
|
---|
| 1661 | {
|
---|
[82246] | 1662 | case PLANAR1:
|
---|
| 1663 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
[43115] | 1664 | case PLANAR4:
|
---|
[82150] | 1665 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
[43115] | 1666 | break;
|
---|
| 1667 | case CGA:
|
---|
| 1668 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
| 1669 | break;
|
---|
| 1670 | case LINEAR8:
|
---|
| 1671 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
| 1672 | break;
|
---|
| 1673 | #ifdef VGA_DEBUG
|
---|
| 1674 | default:
|
---|
| 1675 | unimplemented();
|
---|
| 1676 | #endif
|
---|
| 1677 | }
|
---|
| 1678 | xcurs++;
|
---|
| 1679 | }
|
---|
| 1680 | }
|
---|
| 1681 | }
|
---|
| 1682 |
|
---|
| 1683 | // --------------------------------------------------------------------------------------------
|
---|
| 1684 | static void biosfn_write_char_only(uint8_t car, uint8_t page, uint8_t attr, uint16_t count)
|
---|
| 1685 | {
|
---|
| 1686 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
| 1687 | uint16_t nbcols,nbrows,address;
|
---|
| 1688 | uint16_t cursor,dummy;
|
---|
| 1689 |
|
---|
| 1690 | // Get the mode
|
---|
| 1691 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 1692 | line=find_vga_entry(mode);
|
---|
| 1693 | if(line==0xFF)return;
|
---|
| 1694 |
|
---|
| 1695 | // Get the cursor pos for the page
|
---|
| 1696 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
| 1697 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
| 1698 |
|
---|
| 1699 | // Get the dimensions
|
---|
| 1700 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 1701 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 1702 |
|
---|
| 1703 | if(vga_modes[line].class==TEXT)
|
---|
| 1704 | {
|
---|
| 1705 | // Compute the address
|
---|
| 1706 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
| 1707 |
|
---|
| 1708 | while(count-->0)
|
---|
| 1709 | {write_byte(vga_modes[line].sstart,address,car);
|
---|
| 1710 | address+=2;
|
---|
| 1711 | }
|
---|
| 1712 | }
|
---|
| 1713 | else
|
---|
| 1714 | {
|
---|
| 1715 | // FIXME gfx mode not complete
|
---|
| 1716 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
| 1717 | bpp=vga_modes[line].pixbits;
|
---|
[82246] | 1718 | while(count-->0)
|
---|
[43115] | 1719 | {
|
---|
| 1720 | switch(vga_modes[line].memmodel)
|
---|
| 1721 | {
|
---|
[82246] | 1722 | case PLANAR1:
|
---|
| 1723 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
[43115] | 1724 | case PLANAR4:
|
---|
[82150] | 1725 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
[43115] | 1726 | break;
|
---|
| 1727 | case CGA:
|
---|
| 1728 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
| 1729 | break;
|
---|
| 1730 | case LINEAR8:
|
---|
| 1731 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
| 1732 | break;
|
---|
| 1733 | #ifdef VGA_DEBUG
|
---|
| 1734 | default:
|
---|
| 1735 | unimplemented();
|
---|
| 1736 | #endif
|
---|
| 1737 | }
|
---|
| 1738 | xcurs++;
|
---|
| 1739 | }
|
---|
| 1740 | }
|
---|
| 1741 | }
|
---|
| 1742 |
|
---|
| 1743 | // --------------------------------------------------------------------------------------------
|
---|
| 1744 | static void biosfn_write_pixel(uint8_t BH, uint8_t AL, uint16_t CX, uint16_t DX)
|
---|
| 1745 | {
|
---|
| 1746 | uint8_t mode,line,mask,attr,data;
|
---|
| 1747 | uint16_t addr;
|
---|
| 1748 |
|
---|
| 1749 | // Get the mode
|
---|
| 1750 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 1751 | line=find_vga_entry(mode);
|
---|
| 1752 | if(line==0xFF)return;
|
---|
| 1753 | if(vga_modes[line].class==TEXT)return;
|
---|
| 1754 |
|
---|
| 1755 | switch(vga_modes[line].memmodel)
|
---|
| 1756 | {
|
---|
| 1757 | case PLANAR4:
|
---|
| 1758 | case PLANAR1:
|
---|
| 1759 | addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
[82150] | 1760 | addr += read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE) * BH;
|
---|
[43115] | 1761 | mask = 0x80 >> (CX & 0x07);
|
---|
| 1762 | outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
|
---|
| 1763 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
[83002] | 1764 | data = readx_byte(0xa000,addr);
|
---|
[43115] | 1765 | if (AL & 0x80)
|
---|
| 1766 | {
|
---|
| 1767 | outw(VGAREG_GRDC_ADDRESS, 0x1803);
|
---|
| 1768 | }
|
---|
| 1769 | write_byte(0xa000,addr,AL);
|
---|
| 1770 | outw(VGAREG_GRDC_ADDRESS, 0xff08);
|
---|
| 1771 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1772 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
| 1773 | break;
|
---|
| 1774 | case CGA:
|
---|
| 1775 | if(vga_modes[line].pixbits==2)
|
---|
| 1776 | {
|
---|
| 1777 | addr=(CX>>2)+(DX>>1)*80;
|
---|
| 1778 | }
|
---|
| 1779 | else
|
---|
| 1780 | {
|
---|
| 1781 | addr=(CX>>3)+(DX>>1)*80;
|
---|
| 1782 | }
|
---|
| 1783 | if (DX & 1) addr += 0x2000;
|
---|
| 1784 | data = read_byte(0xb800,addr);
|
---|
| 1785 | if(vga_modes[line].pixbits==2)
|
---|
| 1786 | {
|
---|
| 1787 | attr = (AL & 0x03) << ((3 - (CX & 0x03)) * 2);
|
---|
| 1788 | mask = 0x03 << ((3 - (CX & 0x03)) * 2);
|
---|
| 1789 | }
|
---|
| 1790 | else
|
---|
| 1791 | {
|
---|
| 1792 | attr = (AL & 0x01) << (7 - (CX & 0x07));
|
---|
| 1793 | mask = 0x01 << (7 - (CX & 0x07));
|
---|
| 1794 | }
|
---|
| 1795 | if (AL & 0x80)
|
---|
| 1796 | {
|
---|
| 1797 | data ^= attr;
|
---|
| 1798 | }
|
---|
| 1799 | else
|
---|
| 1800 | {
|
---|
| 1801 | data &= ~mask;
|
---|
| 1802 | data |= attr;
|
---|
| 1803 | }
|
---|
| 1804 | write_byte(0xb800,addr,data);
|
---|
| 1805 | break;
|
---|
| 1806 | case LINEAR8:
|
---|
| 1807 | addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8);
|
---|
| 1808 | write_byte(0xa000,addr,AL);
|
---|
| 1809 | break;
|
---|
| 1810 | #ifdef VGA_DEBUG
|
---|
| 1811 | default:
|
---|
| 1812 | unimplemented();
|
---|
| 1813 | #endif
|
---|
| 1814 | }
|
---|
| 1815 | }
|
---|
| 1816 |
|
---|
| 1817 | // --------------------------------------------------------------------------------------------
|
---|
| 1818 | static void biosfn_write_teletype(uint8_t car, uint8_t page, uint8_t attr, uint8_t flag)
|
---|
| 1819 | {// flag = WITH_ATTR / NO_ATTR
|
---|
| 1820 |
|
---|
| 1821 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
| 1822 | uint16_t nbcols,nbrows,address;
|
---|
| 1823 | uint16_t cursor,dummy;
|
---|
| 1824 |
|
---|
| 1825 | // special case if page is 0xff, use current page
|
---|
| 1826 | if(page==0xff)
|
---|
| 1827 | page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
| 1828 |
|
---|
| 1829 | // Get the mode
|
---|
| 1830 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 1831 | line=find_vga_entry(mode);
|
---|
| 1832 | if(line==0xFF)return;
|
---|
| 1833 |
|
---|
| 1834 | // Get the cursor pos for the page
|
---|
| 1835 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
| 1836 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
| 1837 |
|
---|
| 1838 | // Get the dimensions
|
---|
| 1839 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
| 1840 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 1841 |
|
---|
| 1842 | switch(car)
|
---|
| 1843 | {
|
---|
[50920] | 1844 | case '\a': // ASCII 0x07, BEL
|
---|
[43115] | 1845 | //FIXME should beep
|
---|
| 1846 | break;
|
---|
| 1847 |
|
---|
[50920] | 1848 | case '\b': // ASCII 0x08, BS
|
---|
[43115] | 1849 | if(xcurs>0)xcurs--;
|
---|
| 1850 | break;
|
---|
| 1851 |
|
---|
[50920] | 1852 | case '\n': // ASCII 0x0A, LF
|
---|
[43115] | 1853 | ycurs++;
|
---|
| 1854 | break;
|
---|
| 1855 |
|
---|
[50920] | 1856 | case '\r': // ASCII 0x0D, CR
|
---|
| 1857 | xcurs=0;
|
---|
[43115] | 1858 | break;
|
---|
| 1859 |
|
---|
| 1860 | default:
|
---|
| 1861 |
|
---|
| 1862 | if(vga_modes[line].class==TEXT)
|
---|
| 1863 | {
|
---|
| 1864 | // Compute the address
|
---|
| 1865 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
| 1866 |
|
---|
| 1867 | // Write the char
|
---|
| 1868 | write_byte(vga_modes[line].sstart,address,car);
|
---|
| 1869 |
|
---|
| 1870 | if(flag==WITH_ATTR)
|
---|
| 1871 | write_byte(vga_modes[line].sstart,address+1,attr);
|
---|
| 1872 | }
|
---|
| 1873 | else
|
---|
| 1874 | {
|
---|
| 1875 | // FIXME gfx mode not complete
|
---|
| 1876 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
| 1877 | bpp=vga_modes[line].pixbits;
|
---|
| 1878 | switch(vga_modes[line].memmodel)
|
---|
| 1879 | {
|
---|
[82246] | 1880 | case PLANAR1:
|
---|
| 1881 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
[43115] | 1882 | case PLANAR4:
|
---|
[82150] | 1883 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
[43115] | 1884 | break;
|
---|
| 1885 | case CGA:
|
---|
| 1886 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
| 1887 | break;
|
---|
| 1888 | case LINEAR8:
|
---|
| 1889 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
| 1890 | break;
|
---|
| 1891 | #ifdef VGA_DEBUG
|
---|
| 1892 | default:
|
---|
| 1893 | unimplemented();
|
---|
| 1894 | #endif
|
---|
| 1895 | }
|
---|
| 1896 | }
|
---|
| 1897 | xcurs++;
|
---|
[50920] | 1898 | // Do we need to wrap ?
|
---|
| 1899 | if(xcurs==nbcols)
|
---|
| 1900 | {xcurs=0;
|
---|
| 1901 | ycurs++;
|
---|
| 1902 | }
|
---|
[43115] | 1903 | }
|
---|
| 1904 |
|
---|
| 1905 | // Do we need to scroll ?
|
---|
| 1906 | if(ycurs==nbrows)
|
---|
| 1907 | {
|
---|
| 1908 | if(vga_modes[line].class==TEXT)
|
---|
| 1909 | {
|
---|
| 1910 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+(ycurs-1)*nbcols)*2;
|
---|
| 1911 | attr=read_byte(vga_modes[line].sstart,address+1);
|
---|
| 1912 | biosfn_scroll(0x01,attr,0,0,nbrows-1,nbcols-1,page,SCROLL_UP);
|
---|
| 1913 | }
|
---|
| 1914 | else
|
---|
| 1915 | {
|
---|
| 1916 | biosfn_scroll(0x01,0x00,0,0,nbrows-1,nbcols-1,page,SCROLL_UP);
|
---|
| 1917 | }
|
---|
| 1918 | ycurs-=1;
|
---|
| 1919 | }
|
---|
| 1920 |
|
---|
| 1921 | // Set the cursor for the page
|
---|
| 1922 | cursor=ycurs; cursor<<=8; cursor+=xcurs;
|
---|
| 1923 | biosfn_set_cursor_pos(page,cursor);
|
---|
| 1924 | }
|
---|
| 1925 |
|
---|
| 1926 | // --------------------------------------------------------------------------------------------
|
---|
| 1927 | static void get_font_access(void)
|
---|
| 1928 | {
|
---|
[97622] | 1929 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
| 1930 | outb(VGAREG_GRDC_ADDRESS, 0x06);
|
---|
| 1931 | outw(VGAREG_GRDC_ADDRESS, (((0x04 | (inb(VGAREG_GRDC_DATA) & 0x01)) << 8) | 0x06));
|
---|
[43115] | 1932 | outw(VGAREG_SEQU_ADDRESS, 0x0402);
|
---|
[97622] | 1933 | outw(VGAREG_SEQU_ADDRESS, 0x0604);
|
---|
[43115] | 1934 | }
|
---|
| 1935 |
|
---|
| 1936 | static void release_font_access(void)
|
---|
| 1937 | {
|
---|
| 1938 | outw(VGAREG_GRDC_ADDRESS, (((0x0a | ((inb(VGAREG_READ_MISC_OUTPUT) & 0x01) << 2)) << 8) | 0x06));
|
---|
| 1939 | outw(VGAREG_GRDC_ADDRESS, 0x1005);
|
---|
[97622] | 1940 | outw(VGAREG_SEQU_ADDRESS, 0x0302);
|
---|
| 1941 | outw(VGAREG_SEQU_ADDRESS, 0x0204);
|
---|
[43115] | 1942 | }
|
---|
| 1943 |
|
---|
| 1944 | static void set_scan_lines(uint8_t lines)
|
---|
| 1945 | {
|
---|
| 1946 | uint16_t crtc_addr,cols,vde;
|
---|
| 1947 | uint8_t crtc_r9,ovl,rows;
|
---|
| 1948 |
|
---|
| 1949 | crtc_addr = read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
| 1950 | outb(crtc_addr, 0x09);
|
---|
| 1951 | crtc_r9 = inb(crtc_addr+1);
|
---|
| 1952 | crtc_r9 = (crtc_r9 & 0xe0) | (lines - 1);
|
---|
| 1953 | outb(crtc_addr+1, crtc_r9);
|
---|
| 1954 | if(lines==8)
|
---|
| 1955 | {
|
---|
| 1956 | biosfn_set_cursor_shape(0x06,0x07);
|
---|
| 1957 | }
|
---|
| 1958 | else
|
---|
| 1959 | {
|
---|
| 1960 | biosfn_set_cursor_shape(lines-4,lines-3);
|
---|
| 1961 | }
|
---|
| 1962 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, lines);
|
---|
| 1963 | outb(crtc_addr, 0x12);
|
---|
| 1964 | vde = inb(crtc_addr+1);
|
---|
| 1965 | outb(crtc_addr, 0x07);
|
---|
| 1966 | ovl = inb(crtc_addr+1);
|
---|
| 1967 | vde += (((ovl & 0x02) << 7) + ((ovl & 0x40) << 3) + 1);
|
---|
| 1968 | rows = vde / lines;
|
---|
| 1969 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, rows-1);
|
---|
| 1970 | cols = read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
| 1971 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, rows * cols * 2);
|
---|
| 1972 | }
|
---|
| 1973 |
|
---|
[93841] | 1974 | static void biosfn_set_font_block(uint8_t BL)
|
---|
| 1975 | {
|
---|
| 1976 | outw(VGAREG_SEQU_ADDRESS, 0x0100);
|
---|
| 1977 | outw(VGAREG_SEQU_ADDRESS, 0x0003 | (BL << 8));
|
---|
| 1978 | outw(VGAREG_SEQU_ADDRESS, 0x0300);
|
---|
| 1979 | }
|
---|
| 1980 |
|
---|
[97651] | 1981 | static void load_text_patch(uint16_t ES, uint16_t BP, uint8_t BL, uint8_t BH)
|
---|
| 1982 | {
|
---|
| 1983 | uint16_t blockaddr, dest, src;
|
---|
| 1984 | uint8_t __far *pat;
|
---|
| 1985 |
|
---|
| 1986 | get_font_access();
|
---|
| 1987 |
|
---|
| 1988 | blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
|
---|
| 1989 | pat = ES :> (uint8_t *)BP;
|
---|
| 1990 | src = BP + 1;
|
---|
| 1991 | while (*pat) {
|
---|
| 1992 | dest = blockaddr + *pat * 32;
|
---|
| 1993 | memcpyb(0xA000, dest, ES, src, BH);
|
---|
| 1994 | src += BH + 1;
|
---|
| 1995 | pat += BH + 1;
|
---|
| 1996 | }
|
---|
| 1997 |
|
---|
| 1998 | release_font_access();
|
---|
| 1999 | }
|
---|
| 2000 |
|
---|
[43116] | 2001 | static void biosfn_load_text_user_pat(uint8_t AL, uint16_t ES, uint16_t BP, uint16_t CX,
|
---|
[43115] | 2002 | uint16_t DX, uint8_t BL, uint8_t BH)
|
---|
| 2003 | {
|
---|
| 2004 | uint16_t blockaddr,dest,i,src;
|
---|
| 2005 |
|
---|
| 2006 | get_font_access();
|
---|
| 2007 | blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
|
---|
| 2008 | for(i=0;i<CX;i++)
|
---|
| 2009 | {
|
---|
| 2010 | src = BP + i * BH;
|
---|
| 2011 | dest = blockaddr + (DX + i) * 32;
|
---|
| 2012 | memcpyb(0xA000, dest, ES, src, BH);
|
---|
| 2013 | }
|
---|
| 2014 | release_font_access();
|
---|
| 2015 | if(AL>=0x10)
|
---|
| 2016 | {
|
---|
| 2017 | set_scan_lines(BH);
|
---|
| 2018 | }
|
---|
| 2019 | }
|
---|
| 2020 |
|
---|
| 2021 | static void biosfn_load_gfx_8_8_chars(uint16_t ES, uint16_t BP)
|
---|
| 2022 | {
|
---|
[93873] | 2023 | set_int_vector(0x1F, ES:>BP);
|
---|
[43115] | 2024 | }
|
---|
[93873] | 2025 |
|
---|
| 2026 | static void set_gfx_font(void _far *font, uint16_t cheight, uint8_t row_code, uint8_t rows)
|
---|
| 2027 | {
|
---|
| 2028 | static uint8_t row_tbl[] = { 0, 14, 25, 43 };
|
---|
| 2029 |
|
---|
| 2030 | set_int_vector(0x43, font);
|
---|
| 2031 | if (row_code) {
|
---|
| 2032 | if (row_code > 3)
|
---|
| 2033 | row_code = 2; /* Default to 25 rows. */
|
---|
| 2034 | rows = row_tbl[row_code];
|
---|
| 2035 | }
|
---|
| 2036 | /* Else 'rows' used as is. */
|
---|
| 2037 |
|
---|
| 2038 | write_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, cheight);
|
---|
| 2039 | write_word(BIOSMEM_SEG, BIOSMEM_NB_ROWS, rows - 1);
|
---|
| 2040 | }
|
---|
| 2041 |
|
---|
[43115] | 2042 | static void biosfn_load_gfx_user_chars(uint16_t ES, uint16_t BP, uint16_t CX,
|
---|
| 2043 | uint8_t BL, uint8_t DL)
|
---|
| 2044 | {
|
---|
[93873] | 2045 | set_gfx_font(ES:>BP, CX, BL, DL);
|
---|
[43115] | 2046 | }
|
---|
[93873] | 2047 |
|
---|
| 2048 | /* Some references (RBIL) suggest that only BL is used; that is wrong,
|
---|
| 2049 | * all of these subfunctions will use DL if BL is zero.
|
---|
| 2050 | */
|
---|
| 2051 | static void biosfn_load_gfx_8_14_chars(uint8_t BL, uint8_t DL)
|
---|
[43115] | 2052 | {
|
---|
[93873] | 2053 | set_gfx_font(vgafont14, 14, BL, DL);
|
---|
[43115] | 2054 | }
|
---|
[93873] | 2055 | static void biosfn_load_gfx_8_8_dd_chars(uint8_t BL, uint8_t DL)
|
---|
[43115] | 2056 | {
|
---|
[93873] | 2057 | set_gfx_font(vgafont8, 8, BL, DL);
|
---|
[43115] | 2058 | }
|
---|
[93873] | 2059 | static void biosfn_load_gfx_8_16_chars(uint8_t BL, uint8_t DL)
|
---|
[43115] | 2060 | {
|
---|
[93873] | 2061 | set_gfx_font(vgafont16, 16, BL, DL);
|
---|
[43115] | 2062 | }
|
---|
| 2063 | // --------------------------------------------------------------------------------------------
|
---|
| 2064 | static void biosfn_alternate_prtsc(void)
|
---|
| 2065 | {
|
---|
| 2066 | #ifdef VGA_DEBUG
|
---|
| 2067 | unimplemented();
|
---|
| 2068 | #endif
|
---|
| 2069 | }
|
---|
[94355] | 2070 | // --------------------------------------------------------------------------------------------
|
---|
| 2071 | static void biosfn_set_txt_lines(uint8_t AL)
|
---|
| 2072 | {
|
---|
| 2073 | uint8_t mctl;
|
---|
[43115] | 2074 |
|
---|
[94355] | 2075 | /* Read byte at 40:89. */
|
---|
| 2076 | mctl = read_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL);
|
---|
| 2077 | mctl = mctl & 0x6F; /* Clear 400/200 line flags. */
|
---|
| 2078 |
|
---|
| 2079 | switch (AL) /* AL was already validated to be in 0-2 range. */
|
---|
| 2080 | {
|
---|
| 2081 | case 0: /* 200 lines. */
|
---|
| 2082 | mctl |= 0x80;
|
---|
| 2083 | break;
|
---|
| 2084 | case 2: /* 400 lines. */
|
---|
| 2085 | mctl |= 0x10;
|
---|
| 2086 | break;
|
---|
| 2087 | }
|
---|
| 2088 | write_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL, mctl);
|
---|
| 2089 | }
|
---|
| 2090 |
|
---|
[43115] | 2091 | // --------------------------------------------------------------------------------------------
|
---|
| 2092 | static void biosfn_switch_video_interface (AL,ES,DX) uint8_t AL;uint16_t ES;uint16_t DX;
|
---|
| 2093 | {
|
---|
| 2094 | #ifdef VGA_DEBUG
|
---|
| 2095 | unimplemented();
|
---|
| 2096 | #endif
|
---|
| 2097 | }
|
---|
| 2098 | static void biosfn_enable_video_refresh_control(uint8_t AL)
|
---|
| 2099 | {
|
---|
| 2100 | #ifdef VGA_DEBUG
|
---|
| 2101 | unimplemented();
|
---|
| 2102 | #endif
|
---|
| 2103 | }
|
---|
| 2104 |
|
---|
| 2105 | // --------------------------------------------------------------------------------------------
|
---|
| 2106 | static void biosfn_write_string(uint8_t flag, uint8_t page, uint8_t attr, uint16_t count,
|
---|
| 2107 | uint8_t row, uint8_t col, uint16_t seg, uint16_t offset)
|
---|
| 2108 | {
|
---|
| 2109 | uint16_t newcurs,oldcurs,dummy;
|
---|
| 2110 | uint8_t car;
|
---|
| 2111 |
|
---|
| 2112 | // Read curs info for the page
|
---|
| 2113 | vga_get_cursor_pos(page,&dummy,&oldcurs);
|
---|
| 2114 |
|
---|
| 2115 | // if row=0xff special case : use current cursor position
|
---|
| 2116 | if(row==0xff)
|
---|
| 2117 | {col=oldcurs&0x00ff;
|
---|
| 2118 | row=(oldcurs&0xff00)>>8;
|
---|
| 2119 | }
|
---|
| 2120 |
|
---|
| 2121 | newcurs=row; newcurs<<=8; newcurs+=col;
|
---|
| 2122 | biosfn_set_cursor_pos(page,newcurs);
|
---|
| 2123 |
|
---|
| 2124 | while(count--!=0)
|
---|
| 2125 | {
|
---|
| 2126 | car=read_byte(seg,offset++);
|
---|
| 2127 | if((flag&0x02)!=0)
|
---|
| 2128 | attr=read_byte(seg,offset++);
|
---|
| 2129 |
|
---|
| 2130 | biosfn_write_teletype(car,page,attr,WITH_ATTR);
|
---|
| 2131 | }
|
---|
| 2132 |
|
---|
| 2133 | // Set back curs pos
|
---|
| 2134 | if((flag&0x01)==0)
|
---|
| 2135 | biosfn_set_cursor_pos(page,oldcurs);
|
---|
| 2136 | }
|
---|
| 2137 |
|
---|
| 2138 | // --------------------------------------------------------------------------------------------
|
---|
| 2139 | static void biosfn_read_state_info(uint16_t BX, uint16_t ES, uint16_t DI)
|
---|
| 2140 | {
|
---|
[82196] | 2141 | uint16_t pg_sz;
|
---|
| 2142 | uint16_t scans;
|
---|
| 2143 | uint8_t mode;
|
---|
| 2144 | uint8_t mctl;
|
---|
| 2145 | uint8_t temp;
|
---|
| 2146 |
|
---|
| 2147 | mode = read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
| 2148 | pg_sz = read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
|
---|
[43115] | 2149 | // Address of static functionality table
|
---|
| 2150 | write_dword(ES,DI+0x00, (uint32_t)(void __far *)static_functionality);
|
---|
| 2151 |
|
---|
[82196] | 2152 | // A lot is a straight copy from the BDA. Note that the number
|
---|
| 2153 | // of character rows in the BDA is zero-based but one-based in
|
---|
| 2154 | // the dynamic state area
|
---|
| 2155 | memcpyb(ES,DI+0x04,BIOSMEM_SEG,BIOSMEM_CURRENT_MODE,30);
|
---|
| 2156 | write_byte(ES,DI+0x22,read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1);
|
---|
| 2157 | memcpyb(ES,DI+0x23,BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,2);
|
---|
[43115] | 2158 |
|
---|
| 2159 | write_byte(ES,DI+0x25,read_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX));
|
---|
[82196] | 2160 | write_byte(ES,DI+0x26,0); // Alternate display code
|
---|
| 2161 | write_word(ES,DI+0x27,16); // Number of colors
|
---|
| 2162 | write_byte(ES,DI+0x29,8); // Number of pages
|
---|
| 2163 | write_byte(ES,DI+0x2a,2); // Vertical resolution specifier
|
---|
| 2164 | write_byte(ES,DI+0x2b,0); // Primary font block
|
---|
| 2165 | write_byte(ES,DI+0x2c,0); // Secondary font block
|
---|
| 2166 | write_byte(ES,DI+0x2d,0x21);
|
---|
| 2167 | write_byte(ES,DI+0x31,3); // 256K video RAM
|
---|
| 2168 | write_byte(ES,DI+0x32,0); // Save pointer state information
|
---|
[43115] | 2169 |
|
---|
[82196] | 2170 | mctl = read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL);
|
---|
| 2171 |
|
---|
| 2172 | /* Extract and write the vertical resolution specifier bits. */
|
---|
| 2173 | scans = ((mctl & 0x80) >> 6) | ((mctl & 0x10) >> 4);
|
---|
| 2174 | switch (scans) {
|
---|
| 2175 | case 0: temp = 1; break; /* 350 lines */
|
---|
| 2176 | case 1: temp = 2; break; /* 400 lines */
|
---|
| 2177 | default:
|
---|
| 2178 | case 2: temp = 0; break; /* 200 lines */
|
---|
| 2179 | }
|
---|
| 2180 | write_byte(ES,DI+0x2a,temp);
|
---|
| 2181 |
|
---|
| 2182 | /* Patch up the data for graphics modes. */
|
---|
| 2183 | if (mode >= 0x0E && mode <= 0x12) {
|
---|
| 2184 | if (pg_sz)
|
---|
| 2185 | write_byte(ES,DI+0x29,16384/(pg_sz >> 2));
|
---|
| 2186 | } else if (mode == 0x13) {
|
---|
| 2187 | write_byte(ES,DI+0x29,1); /* Just one page due to chaining */
|
---|
| 2188 | write_word(ES,DI+0x27,256); /* But 256!! colors!!! */
|
---|
| 2189 | } else if (mode >= 4 && mode <= 6) {
|
---|
| 2190 | /* CGA modes. */
|
---|
| 2191 | if (pg_sz)
|
---|
| 2192 | write_byte(ES,DI+0x29,16384/pg_sz);
|
---|
| 2193 | write_word(ES,DI+0x27,4);
|
---|
| 2194 | }
|
---|
| 2195 | if (mode == 6 || mode == 0x11)
|
---|
| 2196 | write_word(ES,DI+0x27,2); /* 2-color modes. */
|
---|
| 2197 |
|
---|
| 2198 | if ((mode >= 4) && (mode != 7)) {
|
---|
| 2199 | write_byte(ES,DI+0x2d,0x01);
|
---|
| 2200 | scans = (read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1) * read_byte(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT);
|
---|
| 2201 | switch (scans) {
|
---|
| 2202 | case 200: temp = 0; break;
|
---|
| 2203 | case 350: temp = 1; break;
|
---|
| 2204 | case 400: temp = 2; break;
|
---|
| 2205 | default:
|
---|
| 2206 | case 480: temp = 3; break;
|
---|
| 2207 | }
|
---|
| 2208 | write_byte(ES,DI+0x2a,temp);
|
---|
| 2209 | }
|
---|
| 2210 |
|
---|
[43115] | 2211 | memsetb(ES,DI+0x33,0,13);
|
---|
| 2212 | }
|
---|
| 2213 |
|
---|
| 2214 | // --------------------------------------------------------------------------------------------
|
---|
| 2215 | uint16_t biosfn_read_video_state_size2(uint16_t state)
|
---|
| 2216 | {
|
---|
| 2217 | uint16_t size;
|
---|
| 2218 |
|
---|
| 2219 | size = 0;
|
---|
| 2220 | if (state & 1)
|
---|
| 2221 | size += 0x46;
|
---|
| 2222 |
|
---|
| 2223 | if (state & 2)
|
---|
| 2224 | size += (5 + 8 + 5) * 2 + 6;
|
---|
| 2225 |
|
---|
| 2226 | if (state & 4)
|
---|
| 2227 | size += 3 + 256 * 3 + 1;
|
---|
| 2228 |
|
---|
| 2229 | return size;
|
---|
| 2230 | }
|
---|
| 2231 |
|
---|
| 2232 | static void vga_get_video_state_size(uint16_t state, uint16_t STACK_BASED *size)
|
---|
| 2233 | {
|
---|
[82111] | 2234 | /* The size is the number of 64-byte blocks required to save the state. */
|
---|
| 2235 | *size = (biosfn_read_video_state_size2(state) + 63) / 64;
|
---|
[43115] | 2236 | }
|
---|
| 2237 |
|
---|
| 2238 | uint16_t biosfn_save_video_state(uint16_t CX, uint16_t ES, uint16_t BX)
|
---|
| 2239 | {
|
---|
| 2240 | uint16_t i, crtc_addr, ar_index;
|
---|
| 2241 |
|
---|
| 2242 | crtc_addr = read_word(BIOSMEM_SEG, BIOSMEM_CRTC_ADDRESS);
|
---|
| 2243 | if (CX & 1) {
|
---|
| 2244 | write_byte(ES, BX, inb(VGAREG_SEQU_ADDRESS)); BX++;
|
---|
| 2245 | write_byte(ES, BX, inb(crtc_addr)); BX++;
|
---|
| 2246 | write_byte(ES, BX, inb(VGAREG_GRDC_ADDRESS)); BX++;
|
---|
| 2247 | inb(VGAREG_ACTL_RESET);
|
---|
| 2248 | ar_index = inb(VGAREG_ACTL_ADDRESS);
|
---|
| 2249 | write_byte(ES, BX, ar_index); BX++;
|
---|
| 2250 | write_byte(ES, BX, inb(VGAREG_READ_FEATURE_CTL)); BX++;
|
---|
| 2251 |
|
---|
| 2252 | for(i=1;i<=4;i++){
|
---|
| 2253 | outb(VGAREG_SEQU_ADDRESS, i);
|
---|
| 2254 | write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++;
|
---|
| 2255 | }
|
---|
| 2256 | outb(VGAREG_SEQU_ADDRESS, 0);
|
---|
| 2257 | write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++;
|
---|
| 2258 |
|
---|
| 2259 | for(i=0;i<=0x18;i++) {
|
---|
| 2260 | outb(crtc_addr,i);
|
---|
| 2261 | write_byte(ES, BX, inb(crtc_addr+1)); BX++;
|
---|
| 2262 | }
|
---|
| 2263 |
|
---|
| 2264 | for(i=0;i<=0x13;i++) {
|
---|
[93841] | 2265 | inb(VGAREG_ACTL_RESET); /* Reads do not toggle flip-flop! */
|
---|
[43115] | 2266 | outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
|
---|
| 2267 | write_byte(ES, BX, inb(VGAREG_ACTL_READ_DATA)); BX++;
|
---|
| 2268 | }
|
---|
| 2269 | inb(VGAREG_ACTL_RESET);
|
---|
| 2270 |
|
---|
| 2271 | for(i=0;i<=8;i++) {
|
---|
| 2272 | outb(VGAREG_GRDC_ADDRESS,i);
|
---|
| 2273 | write_byte(ES, BX, inb(VGAREG_GRDC_DATA)); BX++;
|
---|
| 2274 | }
|
---|
| 2275 |
|
---|
| 2276 | write_word(ES, BX, crtc_addr); BX+= 2;
|
---|
| 2277 |
|
---|
| 2278 | /* XXX: read plane latches */
|
---|
| 2279 | write_byte(ES, BX, 0); BX++;
|
---|
| 2280 | write_byte(ES, BX, 0); BX++;
|
---|
| 2281 | write_byte(ES, BX, 0); BX++;
|
---|
| 2282 | write_byte(ES, BX, 0); BX++;
|
---|
| 2283 | }
|
---|
| 2284 | if (CX & 2) {
|
---|
| 2285 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE)); BX++;
|
---|
| 2286 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)); BX += 2;
|
---|
| 2287 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)); BX += 2;
|
---|
| 2288 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)); BX += 2;
|
---|
| 2289 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)); BX++;
|
---|
| 2290 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)); BX += 2;
|
---|
| 2291 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL)); BX++;
|
---|
| 2292 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES)); BX++;
|
---|
| 2293 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL)); BX++;
|
---|
| 2294 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE)); BX += 2;
|
---|
| 2295 | for(i=0;i<8;i++) {
|
---|
| 2296 | write_word(ES, BX, read_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i));
|
---|
| 2297 | BX += 2;
|
---|
| 2298 | }
|
---|
| 2299 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START)); BX += 2;
|
---|
| 2300 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE)); BX++;
|
---|
| 2301 | /* current font */
|
---|
| 2302 | write_word(ES, BX, read_word(0, 0x1f * 4)); BX += 2;
|
---|
| 2303 | write_word(ES, BX, read_word(0, 0x1f * 4 + 2)); BX += 2;
|
---|
| 2304 | write_word(ES, BX, read_word(0, 0x43 * 4)); BX += 2;
|
---|
| 2305 | write_word(ES, BX, read_word(0, 0x43 * 4 + 2)); BX += 2;
|
---|
| 2306 | }
|
---|
| 2307 | if (CX & 4) {
|
---|
| 2308 | /* XXX: check this */
|
---|
| 2309 | write_byte(ES, BX, inb(VGAREG_DAC_STATE)); BX++; /* read/write mode dac */
|
---|
| 2310 | write_byte(ES, BX, inb(VGAREG_DAC_WRITE_ADDRESS)); BX++; /* pix address */
|
---|
| 2311 | write_byte(ES, BX, inb(VGAREG_PEL_MASK)); BX++;
|
---|
| 2312 | // Set the whole dac always, from 0
|
---|
| 2313 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
| 2314 | for(i=0;i<256*3;i++) {
|
---|
| 2315 | write_byte(ES, BX, inb(VGAREG_DAC_DATA)); BX++;
|
---|
| 2316 | }
|
---|
| 2317 | write_byte(ES, BX, 0); BX++; /* color select register */
|
---|
| 2318 | }
|
---|
| 2319 | return BX;
|
---|
| 2320 | }
|
---|
| 2321 |
|
---|
| 2322 | uint16_t biosfn_restore_video_state(uint16_t CX, uint16_t ES, uint16_t BX)
|
---|
| 2323 | {
|
---|
| 2324 | uint16_t i, crtc_addr, v, addr1, ar_index;
|
---|
| 2325 |
|
---|
| 2326 | if (CX & 1) {
|
---|
| 2327 | // Reset Attribute Ctl flip-flop
|
---|
| 2328 | inb(VGAREG_ACTL_RESET);
|
---|
| 2329 |
|
---|
| 2330 | crtc_addr = read_word(ES, BX + 0x40);
|
---|
| 2331 | addr1 = BX;
|
---|
| 2332 | BX += 5;
|
---|
| 2333 |
|
---|
| 2334 | for(i=1;i<=4;i++){
|
---|
| 2335 | outb(VGAREG_SEQU_ADDRESS, i);
|
---|
| 2336 | outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++;
|
---|
| 2337 | }
|
---|
| 2338 | outb(VGAREG_SEQU_ADDRESS, 0);
|
---|
| 2339 | outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++;
|
---|
| 2340 |
|
---|
[94451] | 2341 | // select crtc base address
|
---|
| 2342 | v = inb(VGAREG_READ_MISC_OUTPUT) & ~0x01;
|
---|
| 2343 | if (crtc_addr == 0x3d4)
|
---|
| 2344 | v |= 0x01;
|
---|
| 2345 | outb(VGAREG_WRITE_MISC_OUTPUT, v);
|
---|
| 2346 |
|
---|
[43115] | 2347 | // Disable CRTC write protection
|
---|
| 2348 | outw(crtc_addr,0x0011);
|
---|
| 2349 | // Set CRTC regs
|
---|
| 2350 | for(i=0;i<=0x18;i++) {
|
---|
| 2351 | if (i != 0x11) {
|
---|
| 2352 | outb(crtc_addr,i);
|
---|
| 2353 | outb(crtc_addr+1, read_byte(ES, BX));
|
---|
| 2354 | }
|
---|
| 2355 | BX++;
|
---|
| 2356 | }
|
---|
| 2357 | // enable write protection if needed
|
---|
| 2358 | outb(crtc_addr, 0x11);
|
---|
| 2359 | outb(crtc_addr+1, read_byte(ES, BX - 0x18 + 0x11));
|
---|
| 2360 |
|
---|
| 2361 | // Set Attribute Ctl
|
---|
| 2362 | ar_index = read_byte(ES, addr1 + 0x03);
|
---|
| 2363 | inb(VGAREG_ACTL_RESET);
|
---|
| 2364 | for(i=0;i<=0x13;i++) {
|
---|
| 2365 | outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
|
---|
| 2366 | outb(VGAREG_ACTL_WRITE_DATA, read_byte(ES, BX)); BX++;
|
---|
| 2367 | }
|
---|
| 2368 | outb(VGAREG_ACTL_ADDRESS, ar_index);
|
---|
| 2369 | inb(VGAREG_ACTL_RESET);
|
---|
| 2370 |
|
---|
| 2371 | for(i=0;i<=8;i++) {
|
---|
| 2372 | outb(VGAREG_GRDC_ADDRESS,i);
|
---|
| 2373 | outb(VGAREG_GRDC_DATA, read_byte(ES, BX)); BX++;
|
---|
| 2374 | }
|
---|
| 2375 | BX += 2; /* crtc_addr */
|
---|
| 2376 | BX += 4; /* plane latches */
|
---|
| 2377 |
|
---|
| 2378 | outb(VGAREG_SEQU_ADDRESS, read_byte(ES, addr1)); addr1++;
|
---|
| 2379 | outb(crtc_addr, read_byte(ES, addr1)); addr1++;
|
---|
| 2380 | outb(VGAREG_GRDC_ADDRESS, read_byte(ES, addr1)); addr1++;
|
---|
| 2381 | addr1++;
|
---|
| 2382 | outb(crtc_addr - 0x4 + 0xa, read_byte(ES, addr1)); addr1++;
|
---|
| 2383 | }
|
---|
| 2384 | if (CX & 2) {
|
---|
| 2385 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE, read_byte(ES, BX)); BX++;
|
---|
| 2386 | write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS, read_word(ES, BX)); BX += 2;
|
---|
| 2387 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, read_word(ES, BX)); BX += 2;
|
---|
| 2388 | write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS, read_word(ES, BX)); BX += 2;
|
---|
| 2389 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, read_byte(ES, BX)); BX++;
|
---|
| 2390 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, read_word(ES, BX)); BX += 2;
|
---|
| 2391 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL, read_byte(ES, BX)); BX++;
|
---|
| 2392 | write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES, read_byte(ES, BX)); BX++;
|
---|
| 2393 | write_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL, read_byte(ES, BX)); BX++;
|
---|
| 2394 | write_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE, read_word(ES, BX)); BX += 2;
|
---|
| 2395 | for(i=0;i<8;i++) {
|
---|
| 2396 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i, read_word(ES, BX));
|
---|
| 2397 | BX += 2;
|
---|
| 2398 | }
|
---|
| 2399 | write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START, read_word(ES, BX)); BX += 2;
|
---|
| 2400 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE, read_byte(ES, BX)); BX++;
|
---|
| 2401 | /* current font */
|
---|
| 2402 | write_word(0, 0x1f * 4, read_word(ES, BX)); BX += 2;
|
---|
| 2403 | write_word(0, 0x1f * 4 + 2, read_word(ES, BX)); BX += 2;
|
---|
| 2404 | write_word(0, 0x43 * 4, read_word(ES, BX)); BX += 2;
|
---|
| 2405 | write_word(0, 0x43 * 4 + 2, read_word(ES, BX)); BX += 2;
|
---|
| 2406 | }
|
---|
| 2407 | if (CX & 4) {
|
---|
| 2408 | BX++;
|
---|
| 2409 | v = read_byte(ES, BX); BX++;
|
---|
| 2410 | outb(VGAREG_PEL_MASK, read_byte(ES, BX)); BX++;
|
---|
| 2411 | // Set the whole dac always, from 0
|
---|
| 2412 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
| 2413 | for(i=0;i<256*3;i++) {
|
---|
| 2414 | outb(VGAREG_DAC_DATA, read_byte(ES, BX)); BX++;
|
---|
| 2415 | }
|
---|
| 2416 | BX++;
|
---|
| 2417 | outb(VGAREG_DAC_WRITE_ADDRESS, v);
|
---|
| 2418 | }
|
---|
| 2419 | return BX;
|
---|
| 2420 | }
|
---|
| 2421 |
|
---|
| 2422 | // ============================================================================================
|
---|
| 2423 | //
|
---|
| 2424 | // Video Utils
|
---|
| 2425 | //
|
---|
| 2426 | // ============================================================================================
|
---|
| 2427 |
|
---|
| 2428 | // --------------------------------------------------------------------------------------------
|
---|
| 2429 | static uint8_t find_vga_entry(uint8_t mode)
|
---|
| 2430 | {
|
---|
| 2431 | uint8_t i,line=0xFF;
|
---|
| 2432 | for(i=0;i<=MODE_MAX;i++)
|
---|
| 2433 | if(vga_modes[i].svgamode==mode)
|
---|
| 2434 | {line=i;
|
---|
| 2435 | break;
|
---|
| 2436 | }
|
---|
| 2437 | return line;
|
---|
| 2438 | }
|
---|
| 2439 |
|
---|
| 2440 | /* =========================================================== */
|
---|
| 2441 | /*
|
---|
| 2442 | * Misc Utils
|
---|
| 2443 | */
|
---|
| 2444 | /* =========================================================== */
|
---|
| 2445 |
|
---|
[82278] | 2446 | /* This function is used for planar VGA memory reads to defeat the
|
---|
| 2447 | * optimizer. We must read exactly one byte, otherwise the screen
|
---|
| 2448 | * may be corrupted.
|
---|
| 2449 | */
|
---|
[83002] | 2450 | uint8_t readx_byte(uint16_t seg, uint16_t offset)
|
---|
[43115] | 2451 | {
|
---|
| 2452 | return( *(seg:>(uint8_t *)offset) );
|
---|
| 2453 | }
|
---|
| 2454 |
|
---|
| 2455 | #ifdef VGA_DEBUG
|
---|
[43152] | 2456 | void __cdecl unimplemented()
|
---|
[43115] | 2457 | {
|
---|
| 2458 | printf("--> Unimplemented\n");
|
---|
| 2459 | }
|
---|
| 2460 |
|
---|
[43152] | 2461 | void __cdecl unknown()
|
---|
[43115] | 2462 | {
|
---|
| 2463 | printf("--> Unknown int10\n");
|
---|
| 2464 | }
|
---|
| 2465 |
|
---|
| 2466 | #undef VBE_PRINTF_PORT
|
---|
| 2467 | #define VBE_PRINTF_PORT 0x504
|
---|
| 2468 |
|
---|
| 2469 | // --------------------------------------------------------------------------------------------
|
---|
[43152] | 2470 | void __cdecl printf(char *s, ...)
|
---|
[43115] | 2471 | {
|
---|
| 2472 | char c;
|
---|
| 2473 | Boolean in_format;
|
---|
| 2474 | unsigned format_width, i;
|
---|
| 2475 | uint16_t arg, digit, nibble;
|
---|
| 2476 | uint16_t STACK_BASED *arg_ptr;
|
---|
| 2477 |
|
---|
| 2478 | arg_ptr = (uint16_t STACK_BASED *)&s;
|
---|
| 2479 |
|
---|
| 2480 | in_format = 0;
|
---|
| 2481 | format_width = 0;
|
---|
| 2482 |
|
---|
| 2483 | while (c = *s) {
|
---|
| 2484 | if (c == '%') {
|
---|
| 2485 | in_format = 1;
|
---|
| 2486 | format_width = 0;
|
---|
| 2487 | } else if (in_format) {
|
---|
| 2488 | if ((c >= '0') && (c <= '9')) {
|
---|
| 2489 | format_width = (format_width * 10) + (c - '0');
|
---|
| 2490 | } else if (c == 'x') {
|
---|
| 2491 | arg_ptr++; // increment to next arg
|
---|
| 2492 | arg = *arg_ptr;
|
---|
| 2493 | if (format_width == 0)
|
---|
| 2494 | format_width = 4;
|
---|
| 2495 | i = 0;
|
---|
| 2496 | digit = format_width - 1;
|
---|
| 2497 | for (i = 0; i < format_width; i++) {
|
---|
| 2498 | nibble = (arg >> (4 * digit)) & 0x000f;
|
---|
| 2499 | if (nibble <= 9)
|
---|
| 2500 | outb(VBE_PRINTF_PORT, nibble + '0');
|
---|
| 2501 | else
|
---|
| 2502 | outb(VBE_PRINTF_PORT, (nibble - 10) + 'A');
|
---|
| 2503 | digit--;
|
---|
| 2504 | }
|
---|
| 2505 | in_format = 0;
|
---|
| 2506 | }
|
---|
| 2507 | //else if (c == 'd') {
|
---|
| 2508 | // in_format = 0;
|
---|
| 2509 | // }
|
---|
| 2510 | } else {
|
---|
| 2511 | outb(VBE_PRINTF_PORT, c);
|
---|
| 2512 | }
|
---|
| 2513 | ++s;
|
---|
| 2514 | }
|
---|
[43152] | 2515 | }
|
---|
[43115] | 2516 | #endif
|
---|
| 2517 |
|
---|
[63562] | 2518 | /// @todo rearrange, call only from VBE module?
|
---|
[43115] | 2519 | extern void vbe_biosfn_return_controller_information(uint16_t STACK_BASED *AX, uint16_t ES, uint16_t DI);
|
---|
| 2520 | extern void vbe_biosfn_return_mode_information(uint16_t STACK_BASED *AX, uint16_t CX, uint16_t ES, uint16_t DI);
|
---|
| 2521 | extern void vbe_biosfn_set_mode(uint16_t STACK_BASED *AX, uint16_t BX, uint16_t ES, uint16_t DI);
|
---|
| 2522 | extern void vbe_biosfn_save_restore_state(uint16_t STACK_BASED *AX, uint16_t CX, uint16_t DX, uint16_t ES, uint16_t STACK_BASED *BX);
|
---|
[67548] | 2523 | extern void vbe_biosfn_get_set_scanline_length(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
|
---|
[75149] | 2524 | extern void private_biosfn_custom_mode(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
|
---|
[43115] | 2525 |
|
---|
[75149] | 2526 |
|
---|
[43115] | 2527 | // --------------------------------------------------------------------------------------------
|
---|
| 2528 | /*
|
---|
| 2529 | * int10 main dispatcher
|
---|
| 2530 | */
|
---|
[43116] | 2531 | void __cdecl int10_func(uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP, uint16_t BX,
|
---|
[43115] | 2532 | uint16_t DX, uint16_t CX, uint16_t AX, uint16_t DS, uint16_t ES, uint16_t FLAGS)
|
---|
| 2533 | {
|
---|
| 2534 |
|
---|
| 2535 | // BIOS functions
|
---|
| 2536 | switch(GET_AH())
|
---|
| 2537 | {
|
---|
| 2538 | case 0x00:
|
---|
| 2539 | biosfn_set_video_mode(GET_AL());
|
---|
| 2540 | switch(GET_AL()&0x7F)
|
---|
| 2541 | {case 6:
|
---|
| 2542 | SET_AL(0x3F);
|
---|
| 2543 | break;
|
---|
| 2544 | case 0:
|
---|
| 2545 | case 1:
|
---|
| 2546 | case 2:
|
---|
| 2547 | case 3:
|
---|
| 2548 | case 4:
|
---|
| 2549 | case 5:
|
---|
| 2550 | case 7:
|
---|
| 2551 | SET_AL(0x30);
|
---|
| 2552 | break;
|
---|
| 2553 | default:
|
---|
| 2554 | SET_AL(0x20);
|
---|
| 2555 | }
|
---|
| 2556 | break;
|
---|
| 2557 | case 0x01:
|
---|
| 2558 | biosfn_set_cursor_shape(GET_CH(),GET_CL());
|
---|
| 2559 | break;
|
---|
| 2560 | case 0x02:
|
---|
| 2561 | biosfn_set_cursor_pos(GET_BH(),DX);
|
---|
| 2562 | break;
|
---|
| 2563 | case 0x03:
|
---|
| 2564 | vga_get_cursor_pos(GET_BH(), &CX, &DX);
|
---|
| 2565 | break;
|
---|
| 2566 | case 0x04:
|
---|
| 2567 | // Read light pen pos (unimplemented)
|
---|
| 2568 | #ifdef VGA_DEBUG
|
---|
| 2569 | unimplemented();
|
---|
| 2570 | #endif
|
---|
| 2571 | AX=0x00;
|
---|
| 2572 | BX=0x00;
|
---|
| 2573 | CX=0x00;
|
---|
| 2574 | DX=0x00;
|
---|
| 2575 | break;
|
---|
| 2576 | case 0x05:
|
---|
| 2577 | biosfn_set_active_page(GET_AL());
|
---|
| 2578 | break;
|
---|
| 2579 | case 0x06:
|
---|
| 2580 | biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_UP);
|
---|
| 2581 | break;
|
---|
| 2582 | case 0x07:
|
---|
| 2583 | biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_DOWN);
|
---|
| 2584 | break;
|
---|
| 2585 | case 0x08:
|
---|
| 2586 | vga_read_char_attr(GET_BH(), &AX);
|
---|
| 2587 | break;
|
---|
| 2588 | case 0x09:
|
---|
| 2589 | biosfn_write_char_attr(GET_AL(),GET_BH(),GET_BL(),CX);
|
---|
| 2590 | break;
|
---|
| 2591 | case 0x0A:
|
---|
| 2592 | biosfn_write_char_only(GET_AL(),GET_BH(),GET_BL(),CX);
|
---|
| 2593 | break;
|
---|
| 2594 | case 0x0C:
|
---|
| 2595 | biosfn_write_pixel(GET_BH(),GET_AL(),CX,DX);
|
---|
| 2596 | break;
|
---|
| 2597 | case 0x0D:
|
---|
| 2598 | vga_read_pixel(GET_BH(), CX, DX, &AX);
|
---|
| 2599 | break;
|
---|
| 2600 | case 0x0E:
|
---|
| 2601 | // Ralf Brown Interrupt list is WRONG on bh(page)
|
---|
| 2602 | // We do output only on the current page !
|
---|
| 2603 | #ifdef VGA_DEBUG
|
---|
| 2604 | printf("write_teletype %02x\n", GET_AL());
|
---|
| 2605 | #endif
|
---|
| 2606 |
|
---|
| 2607 | biosfn_write_teletype(GET_AL(),0xff,GET_BL(),NO_ATTR);
|
---|
| 2608 | break;
|
---|
| 2609 | case 0x10:
|
---|
| 2610 | // All other functions of group AH=0x10 rewritten in assembler
|
---|
| 2611 | biosfn_perform_gray_scale_summing(BX,CX);
|
---|
| 2612 | break;
|
---|
| 2613 | case 0x11:
|
---|
| 2614 | switch(GET_AL())
|
---|
| 2615 | {
|
---|
| 2616 | case 0x00:
|
---|
| 2617 | case 0x10:
|
---|
| 2618 | biosfn_load_text_user_pat(GET_AL(),ES,BP,CX,DX,GET_BL(),GET_BH());
|
---|
| 2619 | break;
|
---|
| 2620 | case 0x01:
|
---|
| 2621 | case 0x11:
|
---|
[97651] | 2622 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont14, 256, 0, GET_BL(), 14);
|
---|
[43115] | 2623 | break;
|
---|
| 2624 | case 0x02:
|
---|
| 2625 | case 0x12:
|
---|
[97651] | 2626 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont8, 256, 0, GET_BL(), 8);
|
---|
[43115] | 2627 | break;
|
---|
[93841] | 2628 | case 0x03:
|
---|
| 2629 | biosfn_set_font_block(GET_BL());
|
---|
| 2630 | break;
|
---|
[43115] | 2631 | case 0x04:
|
---|
| 2632 | case 0x14:
|
---|
[97651] | 2633 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont16, 256, 0, GET_BL(), 16);
|
---|
[43115] | 2634 | break;
|
---|
| 2635 | case 0x20:
|
---|
| 2636 | biosfn_load_gfx_8_8_chars(ES,BP);
|
---|
| 2637 | break;
|
---|
| 2638 | case 0x21:
|
---|
| 2639 | biosfn_load_gfx_user_chars(ES,BP,CX,GET_BL(),GET_DL());
|
---|
| 2640 | break;
|
---|
| 2641 | case 0x22:
|
---|
[93873] | 2642 | biosfn_load_gfx_8_14_chars(GET_BL(),GET_DL());
|
---|
[43115] | 2643 | break;
|
---|
| 2644 | case 0x23:
|
---|
[93873] | 2645 | biosfn_load_gfx_8_8_dd_chars(GET_BL(),GET_DL());
|
---|
[43115] | 2646 | break;
|
---|
| 2647 | case 0x24:
|
---|
[93873] | 2648 | biosfn_load_gfx_8_16_chars(GET_BL(),GET_DL());
|
---|
[43115] | 2649 | break;
|
---|
| 2650 | case 0x30:
|
---|
| 2651 | vga_get_font_info(GET_BH(), &ES, &BP, &CX, &DX);
|
---|
| 2652 | break;
|
---|
| 2653 | #ifdef VGA_DEBUG
|
---|
| 2654 | default:
|
---|
| 2655 | unknown();
|
---|
| 2656 | #endif
|
---|
| 2657 | }
|
---|
| 2658 |
|
---|
| 2659 | break;
|
---|
| 2660 | case 0x12:
|
---|
| 2661 | switch(GET_BL())
|
---|
| 2662 | {
|
---|
| 2663 | case 0x20:
|
---|
| 2664 | biosfn_alternate_prtsc();
|
---|
| 2665 | break;
|
---|
[94355] | 2666 | case 0x30:
|
---|
| 2667 | if (GET_AL() <= 2) {
|
---|
| 2668 | biosfn_set_txt_lines(GET_AL());
|
---|
| 2669 | SET_AL(0x12);
|
---|
| 2670 | }
|
---|
| 2671 | break;
|
---|
[82133] | 2672 | case 0x34: /* CGA text cursor emulation control. */
|
---|
| 2673 | if (GET_AL() < 2) {
|
---|
| 2674 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,
|
---|
[83002] | 2675 | (read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL) & ~1) | GET_AL());
|
---|
[82133] | 2676 | SET_AL(0x12);
|
---|
| 2677 | }
|
---|
| 2678 | else
|
---|
| 2679 | SET_AL(0); /* Invalid argument. */
|
---|
| 2680 | break;
|
---|
[43115] | 2681 | case 0x35:
|
---|
| 2682 | biosfn_switch_video_interface(GET_AL(),ES,DX);
|
---|
| 2683 | SET_AL(0x12);
|
---|
| 2684 | break;
|
---|
| 2685 | case 0x36:
|
---|
| 2686 | biosfn_enable_video_refresh_control(GET_AL());
|
---|
| 2687 | SET_AL(0x12);
|
---|
| 2688 | break;
|
---|
| 2689 | #ifdef VGA_DEBUG
|
---|
| 2690 | default:
|
---|
| 2691 | unknown();
|
---|
| 2692 | #endif
|
---|
| 2693 | }
|
---|
| 2694 | break;
|
---|
| 2695 | case 0x13:
|
---|
| 2696 | biosfn_write_string(GET_AL(),GET_BH(),GET_BL(),CX,GET_DH(),GET_DL(),ES,BP);
|
---|
| 2697 | break;
|
---|
| 2698 | case 0x1B:
|
---|
| 2699 | biosfn_read_state_info(BX,ES,DI);
|
---|
| 2700 | SET_AL(0x1B);
|
---|
| 2701 | break;
|
---|
| 2702 | case 0x1C:
|
---|
| 2703 | switch(GET_AL())
|
---|
| 2704 | {
|
---|
| 2705 | case 0x00:
|
---|
| 2706 | vga_get_video_state_size(CX,&BX);
|
---|
| 2707 | break;
|
---|
| 2708 | case 0x01:
|
---|
| 2709 | biosfn_save_video_state(CX,ES,BX);
|
---|
| 2710 | break;
|
---|
| 2711 | case 0x02:
|
---|
| 2712 | biosfn_restore_video_state(CX,ES,BX);
|
---|
| 2713 | break;
|
---|
| 2714 | #ifdef VGA_DEBUG
|
---|
| 2715 | default:
|
---|
| 2716 | unknown();
|
---|
| 2717 | #endif
|
---|
| 2718 | }
|
---|
| 2719 | SET_AL(0x1C);
|
---|
| 2720 | break;
|
---|
| 2721 |
|
---|
| 2722 | #ifdef VBE
|
---|
| 2723 | case 0x4f:
|
---|
| 2724 | if (vbe_has_vbe_display()) {
|
---|
| 2725 | switch(GET_AL())
|
---|
| 2726 | {
|
---|
| 2727 | case 0x00:
|
---|
| 2728 | vbe_biosfn_return_controller_information(&AX,ES,DI);
|
---|
| 2729 | break;
|
---|
| 2730 | case 0x01:
|
---|
| 2731 | vbe_biosfn_return_mode_information(&AX,CX,ES,DI);
|
---|
| 2732 | break;
|
---|
| 2733 | case 0x02:
|
---|
| 2734 | vbe_biosfn_set_mode(&AX,BX,ES,DI);
|
---|
| 2735 | break;
|
---|
| 2736 | case 0x04:
|
---|
| 2737 | vbe_biosfn_save_restore_state(&AX, CX, DX, ES, &BX);
|
---|
| 2738 | break;
|
---|
[67548] | 2739 | case 0x06:
|
---|
| 2740 | vbe_biosfn_get_set_scanline_length(&AX, &BX, &CX, &DX);
|
---|
| 2741 | break;
|
---|
[43115] | 2742 | case 0x09:
|
---|
| 2743 | //FIXME
|
---|
| 2744 | #ifdef VGA_DEBUG
|
---|
| 2745 | unimplemented();
|
---|
| 2746 | #endif
|
---|
| 2747 | // function failed
|
---|
| 2748 | AX=0x100;
|
---|
| 2749 | break;
|
---|
| 2750 | case 0x0A:
|
---|
| 2751 | //FIXME
|
---|
| 2752 | #ifdef VGA_DEBUG
|
---|
| 2753 | unimplemented();
|
---|
| 2754 | #endif
|
---|
| 2755 | // function failed
|
---|
| 2756 | AX=0x100;
|
---|
| 2757 | break;
|
---|
| 2758 | default:
|
---|
| 2759 | #ifdef VGA_DEBUG
|
---|
| 2760 | unknown();
|
---|
| 2761 | #endif
|
---|
| 2762 | // function failed
|
---|
| 2763 | AX=0x100;
|
---|
| 2764 | }
|
---|
| 2765 | }
|
---|
| 2766 | else {
|
---|
| 2767 | // No VBE display
|
---|
| 2768 | AX=0x0100;
|
---|
| 2769 | }
|
---|
| 2770 | break;
|
---|
[75149] | 2771 | case 0x56:
|
---|
| 2772 | if (vbe_has_vbe_display()) {
|
---|
| 2773 | switch(GET_AL())
|
---|
| 2774 | {
|
---|
| 2775 | case 0x42:
|
---|
| 2776 | private_biosfn_custom_mode(&AX,&BX,&CX,&DX);
|
---|
| 2777 | break;
|
---|
| 2778 | default:
|
---|
| 2779 | AX=0x0100;
|
---|
| 2780 | break;
|
---|
| 2781 | }
|
---|
| 2782 | } else {
|
---|
| 2783 | // No VBE display
|
---|
| 2784 | AX=0x0100;
|
---|
| 2785 | }
|
---|
| 2786 | break;
|
---|
[43115] | 2787 | #endif
|
---|
| 2788 |
|
---|
| 2789 | #ifdef VGA_DEBUG
|
---|
| 2790 | default:
|
---|
| 2791 | unknown();
|
---|
| 2792 | #endif
|
---|
| 2793 | }
|
---|
| 2794 | }
|
---|
| 2795 |
|
---|
| 2796 | #ifdef VBE
|
---|
| 2797 | //#include "vbe.c"
|
---|
| 2798 | #endif
|
---|
| 2799 |
|
---|
| 2800 | #ifdef CIRRUS
|
---|
| 2801 | #include "clext.c"
|
---|
| 2802 | #endif
|
---|
| 2803 |
|
---|
| 2804 | // --------------------------------------------------------------------------------------------
|
---|
| 2805 |
|
---|