Ticket #106 (closed enhancement: fixed)

Opened 11 years ago

Last modified 10 years ago

[feature-request] Seial Port (COM) Access

Reported by: Technologov Owned by:
Priority: minor Component: other
Version: VirtualBox 1.3.6 Keywords:
Cc: Guest type: other
Host type: other


Please implement a serial COM port access (if not difficult), for several reasons:

  1. Some people use it instead of USB to connect to some devices.
  1. I use it occasionally for software testing
  1. It's already implemented by competitors; Both VMware and VirtualPC.

-Alexey Eremenko

Change History

comment:1 follow-up: ↓ 2 Changed 11 years ago by achimha

This will be added in the near future. However, USB to COM adapters are the better solution because they are more reliable.

comment:2 in reply to: ↑ 1 Changed 11 years ago by chemist109

There are several scientists where I work that could use com port access to communicate with older instruments that require an older version of windows or DOS. My experience with USB to COM adapters has ranged from acceptable to unusable. They really depend on Windows drivers and those are often not well written (and non-existent for many other operating systems).

comment:3 Changed 11 years ago by Technologov

This is absolutely true - you have driver problems with USB-to-COM adapters.

achimha wrote:

However, USB to COM adapters are the better solution because they are more reliable.


NONSENSE ! I have never ever seen real COM port broken, while I had seen lots of adapters got broken because of cheap cable, that has damaged wires inside.

In short, USB-to-COM adapters are *lot* less reliable solution than real COM.

-Alexey Eremenko

comment:4 Changed 11 years ago by achimha

Lack of technical understanding can hardly be compensated by bold statements.

It is not possible to implement a well working COM forwarding solution. This is due to the limited control a host operating system gives you over the various signal lines of the COM ports. Basic things work, more advanced things don't. USB to serial adapters address this issue.

The next version will provide COM port to named pipes (or local domain sockets) but we currently do not plan to support physical COM ports. Contributions are welcome, though.

comment:5 Changed 11 years ago by flipper313

I subscribe to this request for a single reason : I could not find one Linux serial RS232 communication software as Docklight(much powerfull than hyperterminal/cutecom )

comment:6 Changed 11 years ago by Technologov

flipper313: Look better : on Linux you have the following RS-232 clients: screen (the one I use), minicom, PuTTY, ... Those might not address the issue you have, however. On Windows the number of software is highter.

comment:7 Changed 10 years ago by frank

Serial port is implemented but so far no GUI support. See the VirtualBox 1.4.0 documentation on how to activate and use the serial port.

comment:8 Changed 10 years ago by Technologov

Wish fulfilled. Close bug.


comment:9 Changed 10 years ago by michael

  • Status changed from new to closed
  • Resolution set to fixed
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