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First post, by RiP

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Does anyone know the model of this OPTi 82C495SLC motherboard? 😕

ZDgPJEpj_t.jpg

Last edited by RiP on 2023-07-18, 18:24. Edited 3 times in total.

Reply 2 of 21, by evasive

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If there's no other markings, from the color/design it looks like a Soyo motherboard that has lost its paper sticker (yes, Soyo is using paper stickers at the time as only means of labeleing/marking! ).
This would mean we need the bios to wake up, for that you need to put back the oscillator that is missing from the socket near the bottom. Do you have an eeprom reader?

Reply 5 of 21, by Deksor

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There's sticker on the side of the bottom ISA slot, can you show us what it says ?

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Reply 7 of 21, by RiP

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evasive wrote on 2020-07-08, 10:12:

If there's no other markings, from the color/design it looks like a Soyo motherboard that has lost its paper sticker (yes, Soyo is using paper stickers at the time as only means of labeleing/marking! ).
This would mean we need the bios to wake up, for that you need to put back the oscillator that is missing from the socket near the bottom. Do you have an eeprom reader?

I installed 66MHz oscillator and 386DX. The board is running fine but there is no motherboard model in the BIOS.

386SX wrote on 2020-07-08, 10:06:

Are there any codes on the back side of the PCB? Anyway great mainboard.

No.

Deksor wrote on 2020-07-08, 13:38:

There's sticker on the side of the bottom ISA slot, can you show us what it says ?

It's broken.

Reply 8 of 21, by Deksor

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RiP wrote on 2020-07-09, 08:12:
evasive wrote on 2020-07-08, 10:12:

If there's no other markings, from the color/design it looks like a Soyo motherboard that has lost its paper sticker (yes, Soyo is using paper stickers at the time as only means of labeleing/marking! ).
This would mean we need the bios to wake up, for that you need to put back the oscillator that is missing from the socket near the bottom. Do you have an eeprom reader?

I installed 66MHz oscillator and 386DX. The board is running fine but there is no motherboard model in the BIOS.

If it's a Ami bios or award, then there is ! Take a picture of the POST screen please ^^

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Reply 9 of 21, by RiP

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Here you are:

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Reply 10 of 21, by Deksor

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According to the POST string shown at the bottom of the POST screen, this is made by "TAKEN CORPORATION", whoever they are ...

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Reply 11 of 21, by evasive

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there's 4 Taken Corporation motherboards in TH99 but all is socket7 or newer.

archive.org is showing only 486PCI and newer...
https://web.archive.org/web/19970416201600/ht … .tw/CATALOG.HTM

Dang, how close can you go:
https://www.elhvb.com/webhq/models/486vlb3/opti495.html
Do the jumper names match even a bit? It looks like boards from this era have been relabeled all over the place, maybe we can pry a manual from one of the other brands.

Reply 13 of 21, by Deksor

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Could you please dump the bios so we can add your board to ultimateretro.net ?

For the jumper settings, I don't think there's much to do except figuring out the settings yourself. If you can find which pin goes where, maybe some of us could help you. Cache settings probably go to the main chip of the chipset whereas CPU select stuff probably go to the CPU sockets.
Depending on which pins we might be able to determine how to configure the board

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Reply 14 of 21, by RiP

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Deksor wrote on 2021-12-24, 00:00:

Could you please dump the bios so we can add your board to ultimateretro.net ?

For the jumper settings, I don't think there's much to do except figuring out the settings yourself. If you can find which pin goes where, maybe some of us could help you. Cache settings probably go to the main chip of the chipset whereas CPU select stuff probably go to the CPU sockets.
Depending on which pins we might be able to determine how to configure the board

I don't have a programmer.

I really want to add 486DLC with 256KB cache but it's configured for 386 and 128KB cache 🙁

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Reply 15 of 21, by Deksor

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You don't need a programmer to dump a 64kb or less bios (which is your case) 😀

Disable shadow bios in the CMOS setup if it's enabled and then run this program http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP

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Reply 16 of 21, by RiP

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Deksor wrote on 2022-05-06, 09:17:

You don't need a programmer to dump a 64kb or less bios (which is your case) 😀

Disable shadow bios in the CMOS setup if it's enabled and then run this program http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP

Here you are:

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Reply 18 of 21, by evasive

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evasive wrote on 2020-07-08, 12:54:

@pano69: you seem to have a DataExpert EXP-3406
https://th99.classic-computing.de/m/C-D/31975.htm

This is a different brand most likely.

QDI to be exact: https://www.ultimateretro.net/en/motherboards/5380

Reply 19 of 21, by evasive

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RiP wrote on 2022-05-23, 17:48:
Deksor wrote on 2022-05-06, 09:17:

You don't need a programmer to dump a 64kb or less bios (which is your case) 😀

Disable shadow bios in the CMOS setup if it's enabled and then run this program http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP

Here you are:

Made a page for it:
https://www.ultimateretro.net/en/motherboards/11527