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Unknown 486 mobo identification

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First post, by Aldo2m0r04

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Hello, i'm new to this forum. I am helping my friend who is trying to identify this mobo with a 33mhz 486 dx installed (https://imgur.com/dK8u0Eh)
Here i post some other photos of some particulars of this mobo, like the bios chip, the chipset and some other writings. (https://imgur.com/dK8u0Eh) (https://imgur.com/QUR3iTz) (https://imgur.com/B2ib8TE) (https://imgur.com/7d0WDIX)
Thanks in advance if someone can help.

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Reply 1 of 8, by Eep386

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Can you show the POST screen? It may be easier to identify it if we can see the boot-up screens, in particular the BIOS sign-on string(s).

The three triangle logo almost reminds me of American Megatrends, who did make some motherboards. However I am not sure that they would solder DIP cache chips onto the board like that.

Life isn't long enough to re-enable every hidden option in every BIOS on every board... 🙁

Reply 2 of 8, by Aldo2m0r04

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I tryed to power it up but it doesn't show anything. I have to ask to my friend if he already tryed to power it up or if he has a photo of the POST screen. Sorry if sometimes my english is not correct, i'm from Italy and i don't know english very well.

Reply 3 of 8, by debs3759

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Can't find it in UH19, so getting it to boot might be the only way to identify it.

Don't worry about your English, it's good enough to understand (and far better than my Italian!)

See my graphics card database at www.gpuzoo.com
Constantly being worked on. Feel free to message me with any corrections or details of cards you would like me to research and add.

Reply 4 of 8, by Deksor

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This board has fake cache, so it must be a cheap Chinese board (but it doesn't look like it's been made by PCCHIPS).

You should try to hook up a pc speaker to it to see if there's any diagnostic code getting out of it. Even better you should get a post card, this costs peanuts but is very helpful for troubleshooting

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 6 of 8, by Eep386

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Deksor wrote on 2021-08-12, 22:53:

This board has fake cache, so it must be a cheap Chinese board (but it doesn't look like it's been made by PCCHIPS).

Might not be fake cache, but I am not going to get too optimistic about it until the board boots and CACHECHK is run on it.

Life isn't long enough to re-enable every hidden option in every BIOS on every board... 🙁

Reply 8 of 8, by Deksor

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Eep386 wrote on 2021-08-15, 03:18:
Deksor wrote on 2021-08-12, 22:53:

This board has fake cache, so it must be a cheap Chinese board (but it doesn't look like it's been made by PCCHIPS).

Might not be fake cache, but I am not going to get too optimistic about it until the board boots and CACHECHK is run on it.

the "cache chips" are soldered so that's a massive red flag, I might have seen actual cache chips soldered once on someone's picture. I've seen those "AA26256AK" chips before and they were fake unfortuantely. However you should be able to remove them, put sockets and use real cache

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

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