VOGONS


First post, by mpe

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Bought a Mach64 GX PCI card. It comes with VRAM upgrade and it appears to be a Mac Version due to connector setup (DSUB and 15-pin)

DSC_8954-scaled.jpeg

It doesn't work in a PC (doesn't even power on screen).

I was wondering if I can just swap the VGA ROM with another Mach64 PCI I own - ATI Winturbo (which is defective, but that's a different topic) and mod it to become a PC version.

DSC_8956-scaled.jpeg

Now it the screen backlight goes on during boot, but displays no text. Presumably the image is off sync.

I was wondering it is because these two cards use a different RAMDAC (ATI88600 vs IBM37RGB514) so the ROM isn't swappable.

Does anyone have any luck with running Mac PCI cards on PC? Anyone has a PC version of Mach64 and they can dump BIOS? Was there ever a PC Mach64 card with IBM RAMDAC?

Blog|NexGen 586|S4

Reply 1 of 4, by Anonymous Coward

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There should be a PC version of the GX that uses the IBM RAMDAC. I think it's called the Graphics Pro Turbo 1600.

"Will the highways on the internets become more few?" -Gee Dubya
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Reply 2 of 4, by douglar

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Yes, the Graphics Pro Turbo 1600 used the 109-33200-x0 boards, just like the one you pictured.

http://old.vgamuseum.info/images/stories/palc … 64gx_top_hq.jpg

As far as I can tell, the only difference between the 109-33200-10 and the 109-33200-40 were the bios and the mac HD15 display connector.

I'd be surprised if the BIOS from the 109-25500-40 board worked because it doesn't have the IBM ramdac, but sometimes it works out. Keep a backup.

Reply 3 of 4, by mpe

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douglar wrote on 2021-01-10, 22:44:

Yes, the Graphics Pro Turbo 1600 used the 109-33200-x0 boards, just like the one you pictured.

http://old.vgamuseum.info/images/stories/palc … 64gx_top_hq.jpg

Not sure about board numbers, but I don't believe the card on your picture is Graphics Pro Turbo 1600.

1. It only has 2 MB of VRAM (and no upgrade connector)
2. It has 170 MHz RAMDAC (note the CF 17 suffix on the RGB640 chip). The 1600 version should have 220 MHz (or CF22, like on my card).

Most likely it is another ATI WinTurbo card just with IBM RAMDAC.

But it looks like PCB is very close so perhaps the BIOS is the only difference between Mac and PC cards.

Anyway, if anyone can dump the ROM from any version of the card with IBM RAMDAC it would be appreciated.

Blog|NexGen 586|S4

Reply 4 of 4, by PC Hoarder Patrol

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BIOS PN (113-D3700-113 ???) doesn't match with mach64 GX / MAC on this ATI list

https://web.archive.org/web/19990503172836/ht … /bios_list.html

If that is a "D", then maybe a custom board

https://web.archive.org/web/19990503170403/ht … her%20Companies