Searching BIOS dump from Diamond Stealth 64 VLB (S3 Vision964) \ VOGONS

Searching BIOS dump from Diamond Stealth 64 VLB (S3 Vision964)

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First post, by keropi

Posted on 2019-09-20, 12:39

keropi Offline

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Hello!

anyone here has a Diamond Stealth 64 VLB (S3 Vision964) card and can upload the BIOS? 😊
(NSSI can create a VGA BIOS dump from DOS so there is no need for a programmer or even to remove the card/chip)

(image borrowed from http://www.vgamuseum.info)

Need it to potentially finish repairing such a card, thanks in advance!

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Reply 1 of 8, by Predator99

Posted on 2019-09-21, 12:51

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Hi Keropi, my card:

The attachment IMG_4835.JPG is no longer available

Reply 2 of 8, by Predator99

Posted on 2019-09-21, 13:04

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...but have some difficulties with the EPROM, every time I read it it has a different checksum. And the area that differs is at a differnt location each time. Will try again later...

Reply 3 of 8, by Tronix

Posted on 2019-09-21, 13:16

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Found something here: https://www.betaarchive.com/forum/viewtopic.p … c02100d#p434361 Qoute: "suitable 964-based Diamond Stealth 64 bios (VRAM) (This requires a bt485 ramdac and a icd2061 clock generator)"

https://github.com/Tronix286/

Reply 4 of 8, by Predator99

Posted on 2019-09-21, 13:23

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Think now its OK

IBM VGA Compatible BIOS. Stealth 64 Vers. 1.07 (c) Diamond Computer Systems, Inc. MB display memory installed 03/31/95

The attachment Diamond Stealth 64 VLB.rar is no longer available

Reply 5 of 8, by keropi

Posted on 2019-09-21, 14:03

keropi Offline

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@Tronix
the U version of the BIOS is to be used when the S3 chip is made in Taiwan

@Predator99
thanks! it's exactly what I was looking for - I will burn and continue repairs!

Reply 6 of 8, by Tronix

Posted on 2019-09-21, 14:18

Tronix Offline

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keropi wrote:
@Tronix
the U version of the BIOS is to be used when the S3 chip is made in Taiwan

Interesting! I compare "964_107u.rom" with "Diamond Stealth 64 VLB.BIN" and see only two differences:

10000003B: 2F 30
200000136: D1 D0

Offset at 0x3b and 0x136 looks like data tables, not code. Probaly, this is constants for memory clock or chip clock speed...

https://github.com/Tronix286/

Reply 7 of 8, by Predator99

Posted on 2019-09-21, 16:29

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Tronix wrote:
Interesting! I compare "964_107u.rom" with "Diamond Stealth 64 VLB.BIN" and see only two differences: […]
Show full quote
keropi wrote:
@Tronix
the U version of the BIOS is to be used when the S3 chip is made in Taiwan

Interesting! I compare "964_107u.rom" with "Diamond Stealth 64 VLB.BIN" and see only two differences:
10000003B: 2F 30
200000136: D1 D0
Offset at 0x3b and 0x136 looks like data tables, not code. Probaly, this is constants for memory clock or chip clock speed...

Interesting..so it has the same text in it, identical version. In fact its only 1 byte difference, I assume the other differing one is for checksum calculation. Are you going to test both, keropi?

Reply 8 of 8, by keropi

Posted on 2019-09-21, 16:43

keropi Offline

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nope I will only test with the BIOS you provided Predator99 - and as a sidenote the BIOS is the same as the PCI version that was found here: Looking for Diamond Stealth 64 PCI BIOS (S3 Vision964)
in this same thread on the 2nd page Avalon mentions the Diamond note he has about the H and U bios difference , I just go by that 😀

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