Chip 91A/92A/6ADY

[Toca]

A gretting to all forum.
What motherboard is this?
Nonencounter documentation of these Chips.
You pardon my english.
Thanks.
.

[Ritchie]

Are you able to read any documentation off the board or chips.

Maybe you can get a clue on manufacturer or at least the chipset used.

If you can power it into POST, the BIOS string may enable you to track it down using Wim's BIOS BIOS Numbers Pages.

Based on what I can see in the photo you posted, I'd say you have either a late 486 board or early Pentium board. Depending on exactly what it is, it is possible the BIOS may not be flash upgradeable if that is what you are hoping to do.

[Toca]

Thanks to answer so fast.
I have not started up it, I am looking for an old power supply. Chipsets with reference has three.

91A/DY.
92A/AY.
6A/AY.
Bios Ami Pentium.
AI 5.1.

I also believe that it is a motherboard of first of pentium. But nonencounter reference of the manufacturer in the motherboard.

Greetings.

[sulbert]

White ISA slots -> PC Chips?

[Denniss]

There's already a thread at motherboards.org forum with this board in question .
Must be something from ECS/Pcchips according to the white ISA slots and the rebranded chips

Maybe a quetion for TH in the Pcchips Lottery ?

[KachiWachi]

There's a version number in the upper left of your photo (v2.2??)

It is still using old style L2 cache chips (upper right).

Could be Socket 7 with seperate VCore/VI/O support, as there are two regulators by the CPU socket.

It has the look of a PCChips board, as my M912 looked similar (though that is a 486 board...).

[edwin]

looks like sis 501/502/503 chipset (three large chips). would make sense to socket 5...

[aturdido]

There's a version number in the upper left of your photo (v2.2??)

Yes. The exact text is v2.2.

[ajzchips]

A larger picture (excellent quality) has been provided to me by aturdido here:
http://s87841630.onlinehome.us/MBHW/placa_base.jpg

Marginal stuff:
1) Seems like "6A/AY" is related to "UMC /UM8881F /9520-BCS /N45254", from: http://groups.google.com/groups?q=6A/AY ... ftn&rnum=2
2) "6A/AY" has further proof of its possible PCCHIPS origin: http://groups.google.com/groups?q=6A/AY ... .tw&rnum=5

Now... I believe it's definitely of the UMC chipset:
UMC 8891AF/8892AF/8886AF
(in bold, the digits that coincide with what's printed on the chipset).

I have a strong feeling it's the Fugutech P54C whose BIOS ID string is: 51-0100-001437-00101111-101094-P54C586-H

[Rainbow]

The chipset is almost sure UMC. I've seen marking like this on a M912/Cheetah board. Some of these boards have the chips marked properly with UMC logo and other data.
White ISA slots and version number near the keyboard connector - that should really be PC Chips (or something like that) Looks to be pretty rare board.

[th]

Hi

No it´s not the P54C, (I own one).
Anyway it´s pretty close, so we are in Fugutech Country.
Guess UMC is correct.
Most probably the same chipset as here:
http://de.shuttle.com/539.htm

What´s the problem?
Socket 5 don´t have much to configure. Bus speed, multi 1.5 or 2x (sometimes only), cache size (which should already be set).
Everything is printed there.

Bye
Thomas

[KachiWachi]

It's interesting to note that the second PCI slot is labeled "VGA SLOT". Maybe this is a key to its identity?

Any idea why JP6 (by the XTAL) says A, B, C but only has 4 posts??

Any labels on the sides of the sockets, or on the backside?