Re: AW: Multiple text consoles

[Matan Ziv-Av <ma...@sv...>]

On Fri, 3 Feb 2006, Aivils Stoss wrote:

> On Ceturtdiena, 2. Febru=E2ris 2006 21:22, Matan Ziv-Av wrote:
>>> Multiple VGA text consoles seems difficult (Avilis pointed out that onl=
y
>>> one VGA device per PCI domain is allowed) - I really know too little
>>> about it, but it seems to me that one runs into BIOS/Hardware issues
>>> that make more than one VGA device impossible.
>>
>> Actually, multiple VGA text consoles are not that hard. Most PCI card
>> allow alternate access to both VGA registers and VGA memory thru the PCI
>> regions.
>> I adapted vgacon to work on nvidia and matrox cards:
>> http://www.arava.co.il/matan/misc/textcon.tgz
>> but it should be easy to make it more generic.
>
> So if nvvgacon does not take over vgacon, then it is completely independ?
> Can i run multiple nvvgacon simultaneous, if pci bus id specified
> for each instance?

The console output is independent. I use with a standarad kernel and a=20
userspace program that injects keyboard events to specified console, to=20
emulate a two console system.
The module needs to be changed a little to support multiple=20
nvvga consoles, but it can also be done by inserting the module multiple=20
times (after renaming it).

> Is necessary XFree int10 real mode initialisation for each instance?

Yes. Though it can be done with x86emu directly, without using XFree for=20
this.

> From where You get magic values for ioremap()?

I tried every address that ends with 0x3d4, and so which one behaves=20
like the CRTC port.


--=20
Matan Ziv-Av.                         ma...@sv...