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Help me identify this 8Bit ISA Controller Card (IDE?)

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First post, by aaronkatrini

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Hi all,

Among a recent lot of new cards purchased recently there was this 8Bit ISA card with a 40pin (IDE-like) connector and 4 dip switches on the left corner. There is a label stating this is P/N T 23687043. I tried googling it but no relevant results. Also did a search on TH99 with pics but I couldn't find anything. I kindly ask if someone can help me and give me a clue or point me to the right direction.

Also the card has a damaged capacitor that needs replacing is currently preventing me to just plug it in and try it.

Thanks in advance! 😁

https://drive.google.com/drive/folders/1dMWmZ … ?usp=share_link

1LfepVu.jpg

Reply 1 of 6, by Horun

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With a 37 pin D shell and built in 1999, am thinking it is some type industrial A/D card. No IDE card would be 8bit due to lack of the needed higher IRQs.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 6, by Grzyb

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Horun wrote on 2023-01-15, 16:44:

With a 37 pin D shell and built in 1999, am thinking it is some type industrial A/D card. No IDE card would be 8bit due to lack of the needed higher IRQs.

Actually, 8-bit IDE cards do exist, in both XTA and ATA variants.
However, such cards come with a BIOS, so this can't be one of them.

Doesn't look like an A/D card, either, can't see any ADC chips...
It's mostly simple 74-series TTL logic...
But there's also five SEC KA339 comparators next to the external connector, which does suggest some measurements...

Nie tylko, jak widzicie, w tym trudność, że nie zdołacie wejść na moją górę, lecz i w tym, że ja do was cały zejść nie mogę, gdyż schodząc, gubię po drodze to, co miałem donieść.

Reply 3 of 6, by weedeewee

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I recall having a , I think, hitachi CDRom drive which had two 37 pin connectors. This was >30 yrs ago and at the time I didnt know what to hook it up to nor had I internet to look up what it was hooked up to and which specs it had.

Right to repair is fundamental. You own it, you're allowed to fix it.
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Reply 4 of 6, by Grzyb

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1999 is by far too late for a proprietary CD-ROM interface.

Nie tylko, jak widzicie, w tym trudność, że nie zdołacie wejść na moją górę, lecz i w tym, że ja do was cały zejść nie mogę, gdyż schodząc, gubię po drodze to, co miałem donieść.

Reply 5 of 6, by weedeewee

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Grzyb wrote on 2023-01-15, 17:24:

1999 is by far too late for a proprietary CD-ROM interface.

true, true, only noticed that after I had written it 😀

Right to repair is fundamental. You own it, you're allowed to fix it.
How To Ask Questions The Smart Way
Do not ask Why !
https://www.vogonswiki.com/index.php/Serial_port

Reply 6 of 6, by aaronkatrini

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Thank you all for the suggestions. I totally overlooked the facts that all the chips are from '99-ish. The board layout and the overall build quality screams early '80s.

Most likely it's something proprietary of some industrial device. Oh well in the recycling center it goes 😀

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