VOGONS


First post, by perhenden

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A mystery motherboard has found it's way to my house!
Can you identify this Socket 7 motherboard?

I can't find the model and manufacturer of this Socket 7 motherboard, nor it's jumper settings documentation
On the back of the board, TGS 90200 REV B 960228 is printed.

It's using the Intel 430fx chipset, and an onboard Trident tgui9680 - 1 graphics chip.
It has a 60 pin SCSI header (EDIT: No, that's something else).
An Intel Pentium 100Mhz and EDO-ram came with the board.
There is a riser board (2 isa, 2 pci), and there is a cache expansion slot.

Picture attached.

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  • mystery_board.jpg
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    mystery_board.jpg
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    TGS 90200 REV B socket 7 motherboard
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Last edited by perhenden on 2020-05-08, 19:20. Edited 1 time in total.

Reply 1 of 17, by synrgy87

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It's a TriGem board used in prebuilts like compaq or hp or olivetti, I can't provide much more information than that but maybe looking for socket 7 models or pentium models of oviletti(and others they supplied many OEMS) systems would help, if it boots it may have a useful bios id string, worth checking for.

Reply 2 of 17, by dionb

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Not at all sure that 60p connector is for SCSI - for starters there don't seem to be any SCSI controller chips on the board, also 50p and 68p SCSI were a thing, 60p wasn't.

But jumper settings seem pretty well documented on the board - what are you trying to do that you're stuck with?

Reply 3 of 17, by perhenden

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dionb wrote on 2020-05-07, 16:14:

Not at all sure that 60p connector is for SCSI - for starters there don't seem to be any SCSI controller chips on the board, also 50p and 68p SCSI were a thing, 60p wasn't.

That makes sense, I noticed a label saying SCSI somewhat close to the header, that's where my guess came from.
EDIT: the manual says it's for an audio expansion card.

Last edited by perhenden on 2021-04-21, 17:12. Edited 1 time in total.

Reply 4 of 17, by perhenden

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dionb wrote on 2020-05-07, 16:14:

But jumper settings seem pretty well documented on the board - what are you trying to do that you're stuck with?

I didn't see how to select frequency and multiplier for the CPU

Reply 7 of 17, by evasive

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J7 J8 Bus speed
2-3 1-2 50
1-2 1-2 60
2-3 2-3 66
1-2 2-3 not documented

J1(BF1) J2(BF0) Multiplier
2-3 2-3 1.5x
2-3 1-2 2x
1-2 1-2 2.5x
1-2 2-3 3x

So if you have a Pentium 90, use 60MHz bus speed and 1.5x Multiplier

J10 CPU voltage
1-2 3.3V
2-3 3.5V

J11 AT bus clock
1-2 PCI clock /3
2-3 PCI clock /4

It seems the maximum this thing will take is a 166MHz Pentium, pay attention to the voltage setting.

Reply 8 of 17, by dionb

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perhenden wrote on 2020-05-07, 19:37:
dionb wrote on 2020-05-07, 16:14:

But jumper settings seem pretty well documented on the board - what are you trying to do that you're stuck with?

I didn't see how to select frequency and multiplier for the CPU

See above for the spoonfeed version, but in terms of background/how to figure this out yourself:
- BF0 and 1 are the So5 multiplier pins, you can read the encoding in Pentium datasheets if nowhere else.
- S0 and S1 are not as universal, but if it says CLK, that's your FSB. By setting a low (1.5x) multiplier, you can safely test what all four possible S0/S1 combinations do.

Reply 10 of 17, by perhenden

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This BA2284 motherboard comes from an Olivetti PCS 5130, I found the manual.
https://www.ardent-tool.com/Olivetti/Docs/ser … tems2/cap16.pdf

Last edited by perhenden on 2021-07-31, 08:27. Edited 1 time in total.

Reply 12 of 17, by charliegolf

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I have an olivetti xana 53-120 and this is the motherboard that is in that. It takes up to 200 non mmx pentium. The big brown slot is for a riser that you need for expansion. Has built in s3 graphics. The funny connector behind the riser slot is for a proprietory soundblaster that came with it.

YouTube:
66Mhz Brain

Reply 15 of 17, by perhenden

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I upgraded the bios, from 1.2x to version 1.30-0 (rom0130.zip), from https://www.driverguide.com/driver/detail.php?driverid=1125.
Unfortunately the new bios version has a very long delay during POST, before RAM test, because it takes super long to initialize the IDE-devices.
My backup bios cannot be found, or I'd submit and use that.
I've done a backup of this bios (attached). The motherboard works well with it, except the long POST time.

Charliegolf provided the bios from his olivetti xana 53-120, attached as bios_xana_53_120.zip.
Within this zip file there are two files. The file called bios was done using NSSI the file called unibios was done using uniflash.
In my case uniflash reported a checksum error when flashing the 'unibios' file and a size mismatch with the 'bios' file.
It's unsafe to reboot after this checksum error on write, best to reflash the backup instead, which worked well in my case.

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  • Filename
    bios_xana_53_120.zip
    File size
    65.24 KiB
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    9 downloads
    File comment
    BIOS 1.2x for PCS Xana 53-120, unverified
    File license
    Public domain
  • Filename
    romo130.zip
    File size
    851.65 KiB
    Downloads
    14 downloads
    File comment
    BIOS 1.30-0 for PCS 51xx & PCS 61xx & Xana 53-xxx & Xana 73-xxx, verified, uniflash
    File license
    Public domain
Last edited by perhenden on 2021-09-12, 11:34. Edited 1 time in total.

Reply 16 of 17, by perhenden

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evasive wrote on 2021-05-03, 07:32:

Thank you for that info, could you please make a bios dump so it can be added to the page-to-be-in UH19?

Ready now, @evasive.