[9fans] S3 775/325

[9fans] S3 775/325

[Oscar Gala]

Hello,

I have a S3 Trio64 videocard with the 86C775 chipset and a S3 Virge
with the 86C325 Chipset,
but I can't get them to work with the Plan9 installation.
At firt I would get ascreen dump of the Bios Rom, and I made an entry
in the vgadb, but then the installation got hung up in vga mode and I
just saw the cursor blinking, but couldn't do anything.
Does this mean the cards are not compatible with Plan9,
or that I have to make a different entry in vgadb?
And if that is the case, could someone help me with that?

Thanx,

Oscar Gala

[9fans] Re: S3 775/325

[Wladimir Mutel]

Oscar Gala <proto@phatspace.org> wrote:

> I have a S3 Trio64 videocard with the 86C775 chipset and a S3 Virge
> with the 86C325 Chipset,
> but I can't get them to work with the Plan9 installation.

	86c775/86c785 (Trio64V2) works. I just added such line (marked with
+) in /lib/vgadb (and before, in vgadb on boot diskette):

        0xC0044="Phoenix S3 TRIO64 Enhanced VGA BIOS. Version 1.2-07"
+	0xC004B="86C775/86C785"
	link=vga

	Try to find the same place and insert the same line.

> At firt I would get ascreen dump of the Bios Rom, and I made an entry
> in the vgadb, but then the installation got hung up in vga mode and I

	Yes, I copied start address and identifying string exactly from
	video bios dump I got first time.

> just saw the cursor blinking, but couldn't do anything.
> Does this mean the cards are not compatible with Plan9,
> or that I have to make a different entry in vgadb?
> And if that is the case, could someone help me with that?

	Try my suggestion, hope it helps.

--
mwg@alkar.net

Re: [9fans] Re: S3 775/325

[Eric Dorman]

----- Original Message -----
From: "Wladimir Mutel" <mwg@alkar.net>
To: <9fans@cse.psu.edu>
Sent: Friday, June 16, 2000 6:57 AM
Subject: [9fans] Re: S3 775/325

> Oscar Gala <proto@phatspace.org> wrote:
> > I have a S3 Trio64 videocard with the 86C775 chipset and a S3 Virge
> > with the 86C325 Chipset,
> > but I can't get them to work with the Plan9 installation.
> 86c775/86c785 (Trio64V2) works. I just added such line (marked with
> +) in /lib/vgadb (and before, in vgadb on boot diskette):
[xx]hi,

Gotta be careful here, because an 86C775 isin't quite a Trio64
but has some more regs that might have to be filled in.  An example
is the C775 on the HP Vectra VL5/166.  On that box regs
0x90 and 0x91 didn't get filled in correctly, resulting in the
left half of the display repeated twice.  I did the following:
init:
 vga->crt[0x90] = 0x0;
 vga->crt[0x91] = 0x7F;
load:
 vgaxo( Crtx, 0x90, vga->crt[0x90] );
 vgaxo( Crtx, 0x91, vga->crt[0x91] );
looking over the docs today leads me to think that 0x90
is sufficient.

The BIOS string is also different (ah, love HP sometimes).
vgadb:
    0xC004E="86C775"

I have a true-blue Trio64 card to compare against to make
sure I get the correct identification so real regs get filled in,
then I'll generate a patch.

--eld