VirtualBox

Ticket #2736 (new defect)

Opened 5 years ago

It is impossible to set a user's font table for text output in a graphics mode

Reported by: elensky Owned by:
Priority: major Component: other
Version: VirtualBox 2.0.6 Keywords: font DOS
Cc: Guest type: other
Host type: Linux

Description

Interruption of VGA BIOS for installation of a user's font table is not fulfilled. The standard system call is used:

Int 10H [EGA] [MCGA] [VGA] Function 11H (17) Subfunction 21H (33) Set Int 43H for user's font

Call with:

AH = 11H AL = 21H BL = character rows specifier

00H if user specified (see register DL) 01H = 14 (0EH) rows 02H = 25 (19H) rows 03H = 43 (2BH) rows

CX = points (bytes per character) DL = character rows per screen (if BL = 00H) ES:BP = segment:offset of user font table

Returns:

Nothing

Notes:

  • This function provides font selection in graphics (all-points-addressable) display modes.
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