Id an AT&T RAMDAC on a Hercules Tseng VLB card please \ VOGONS

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Id an AT&T RAMDAC on a Hercules Tseng VLB card please

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First post, by retro games 100

Posted on 2018-10-25, 12:44

retro games 100 Offline

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Can anyone id this AT&T RAMDAC please? The writing's faded too much. It's on a 1993 Hercules Dynamite VLB graphics/video card. Thanks a lot!

ram dac.JPG — Filename

ram dac.JPG

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Also, here is one of its 16 RAM chips. Is it a 128Kb 60ns Fast Page Mode DRAM chip? Thanks a lot.

Filename

ram.JPG

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321 views

File license

Fair use/fair dealing exception

Reply 1 of 2, by darry

Posted on 2018-11-06, 05:26

darry Offline

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Location: Canada

My guess would be AT&T 20C491 24-bit DAC .

https://datasheetspdf.com/pdf/530534/AgereSys … ems/ATT20C491/1

Reply 2 of 2, by retro games 100

Posted on 2018-11-07, 07:54

retro games 100 Offline

Rank l33t

Rank: l33t
Posts: 4624
Joined: 2008-05-03, 17:46

Thanks!! 😀
So, a nice RAMDAC then? It's on a 1993 VLB card.

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