VOGONS


Mach64 1 or 2MB?

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Reply 20 of 35, by feipoa

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kixs, I am wondering why the stricker on your ROM's says "GR PRO TURBO"? I happen to be working on my 386 at the moment and have my ISA Mach64 card out. The ROM sticker reads "MACH64 ISA".

MACH64ISA
112-28123-102
ODD(C) 1996

MACH64ISA
112-28122-102
EVEN(C) 1996

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Reply 21 of 35, by kixs

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What do you think is the significance in this? Windows recognises my both cards as "ATI Graphic Pro Turbo" - the one with newer "ISA Mach64" and with older "GR PRO TURBO" stickers. I guess they just marked them differently in 1995/96 production.

I'm wondering if 2MB expansion card (if I could ever find one) would make 3MB of total memory 😕

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Reply 22 of 35, by feipoa

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Not sure if there is any significance.

I think the best way to find the memory expansion card is to find it with the card. The chances of finding one are more than slim.

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Reply 23 of 35, by feipoa

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kixs, did you run all the diagnostic tests from M64DIAG.EXE?

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Reply 24 of 35, by Anonymous Coward

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The expansion card can be found if you know where to look. The key is to make sure you pay attention to the part number. Sometimes you can rob them off a PCI model, and sometimes not. I recently picked one up for $20 including shipping.

I would compare a high resolution image of a working 2MB card and compare the positions of the surface mount resistors.

I feel there are two likely scenarios for your card. Either 1MB was disabled at the factory because of a faulty memory chip, or one of the solder joints on a memory chip went bad causing the entire bank to not be detected. In the latter case it shouldn't be too hard to fix if you can reflow the solder joints. Try applying pressure to each cheap (one at a time) and powering the system on to see if you can get the 2nd meg to be recognised. You'll probably have to use a C clamp to help. Just make sure you don't put the clamp directly onto the IC or PCB.

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V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 25 of 35, by kixs

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feipoa: All tests are OK except DAC LUT Test.

It gives Error ID 88832 and reports:

VGA R/W Test Failed: Index 02h Expected 16h Read 17h R/W Test Failed: Index 00h Expected 16h Read ffh […]
Show full quote

VGA R/W Test Failed:
Index 02h
Expected 16h
Read 17h
R/W Test Failed:
Index 00h
Expected 16h
Read ffh

AC:
Compared the two cards (my and yjfj) I can find two differences:

2IzM5u5l.jpg

On my one missing piece is around the memory chips. The lower left piece is missing from yjfj's card.

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Reply 26 of 35, by feipoa

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The layout on mine is like the yjfj card.

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Reply 27 of 35, by 386SX

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🤑 😖

Best looking isa card...

Reply 28 of 35, by Anonymous Coward

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I always wondered why the hell ATi even bothered with the ISA version. It was serious overkill. I really appreciate that they tried though.

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V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 29 of 35, by 386SX

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Anonymous Coward wrote:

I always wondered why the hell ATi even bothered with the ISA version. It was serious overkill. I really appreciate that they tried though.

With the whole "Overdrive" "Evergreen" upgrade strategies I think it was a good idea even if probably seriously bus limited for the Mach64 capabilities. I'd like to see benchmarks beetween the isa,vlb and pci version of this chip.

Reply 30 of 35, by feipoa

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I'd like to figure out how to set 0ws on the ISA Mach64 card. Based on DOOM, PCPBench, and 3dbench results, it seems like no 0ws is set. There does not appear to be a jumper to set 0ws. Or is the Mach64 just that much slower than the GD-5434, e.g. 23.2 fps in 3dbench for Mach64 vs. 24.3 fps with GD-5434. Or 13.8 fps in Doom w/Mach64 and 14.9 fps in Doom w/GD-5434.

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Reply 31 of 35, by kixs

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I'll do a comparative test of Mach64 ISA/VLB/PCI. Too bad this one doesn't have 2MB as memory bandwidth is reduced. My other card has 2MB but advanced settings can't be configured as it doesn't have an EEPROM.

feipoa:
download Mach64 DOS tools:
http://www.vogonsdrivers.com/getfile.php?fileid=328

and run setup or install (don't know from memory). Look for advanced settings to set 0ws memory and other features.

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Reply 32 of 35, by feipoa

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I'll take a look. I suspect I already set 0 ws a long time ago and forgot that this was set via software. I really like the display quality of the Mach64 ISA in Windows 3.11. It is the best of all the high-end ISA cards. However, I want the look of the Mach64 with the speed of the GD-5434.

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Reply 33 of 35, by feipoa

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I was able to locate the wait state options for the Mach64 ISA via software. It is part of the Install.exe program, not m64diag.exe. Once inside the Install.exe program, navigate to Advanced Setup. There is an option to set the VGA ROM 0 wait state and the VGA RAM 0 wait state. I set both of them to enabled, however the DOOM, PCPBENCH, and 3DBENCH scores did not move at all from their previous disabled results. What gives?

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Reply 34 of 35, by mt777

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Did you resolve this issue?
I got identical card 112-28100-101 stickers on bios. With factory assembled memory module (non upgradeable sticker at back)
I tested 2 newer bios versions and didn't help.
The last step will be desoldering vrams and test them on S3 964 with sockets.

Last edited by mt777 on 2020-07-18, 13:04. Edited 1 time in total.

Reply 35 of 35, by kixs

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Hi,

no, never did but I've also stopped trying and then sold it as 1MB.

You might try replacing the memory but I don't think that's an issue...

Since I've had issues with the cards that don't have an EEPROM... you need the newest drivers and settings are then saved to a file. The file is read by the driver from autoexec.bat upon booting. This is all good if you're using DOS and derivatives. But I don't know if you try and use some version of OS/2, Windows NT or Linux... That's why I prefer cards with EEPROM.

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