Help with old VLSI motherboard \ VOGONS

Help with old VLSI motherboard

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First post, by Rikintosh

Posted on 2021-09-08, 02:30

Rikintosh Offline

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I have this old 486 computer, if I reset the bios, it will turn on normally, but after I make changes and save, if I reset it, it will no longer show an image on the monitor, unfortunately I don't have the manual for this motherboard to to know if there is any jumper out of place, and I also don't understand some of the bios configuration options, if anyone can help me, I would be eternally grateful

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Reply 1 of 9, by Rikintosh

Posted on 2021-09-08, 02:34

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some more pictures

The motherboard looks like an IBM clone. It has several onboard features, including an ide controller, but it also has these connectors to connect some kind of flat cable that I don't know about.

It has a intel overdrive ready socket, and it has a 486 dx100 or amd 75mhz (I don't remember for sure), and a 16mb memory of 60ns

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Reply 2 of 9, by pentiumspeed

Posted on 2021-09-08, 02:40

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This actually was IBM. What model, I know not.

Cheers,

Great Northern aka Canada.

Reply 3 of 9, by BitWrangler

Posted on 2021-09-08, 02:52

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Probably one of their PS/ValuePoint series tryna out packard bell Packard Bell.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 4 of 9, by jakethompson1

Posted on 2021-09-08, 03:04

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Suspect the unknown sockets might be for Zigzag Inline Package (ZIP) video memory.
I have never seen an IBM system that used stock AMIBIOS-did they?
After resetting the CMOS, what if you use setup to reset to Power-On defaults (rather than standard defaults) before saving and then see if it will let you reboot.

Reply 5 of 9, by Eep386

Posted on 2021-09-08, 03:06

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Set C000 and C400 16KB Cacheability to Disabled, and see if that fixes the no-display problem after reboot.
Also disable Video BIOS Cacheable if it's a thing in the BIOS.
Both of those frequently cause various head-scratching problems on old systems.

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

Reply 6 of 9, by Rikintosh

Posted on 2021-09-08, 03:16

Rikintosh Offline

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jakethompson1 wrote on 2021-09-08, 03:04:

Suspect the unknown sockets might be for Zigzag Inline Package (ZIP) video memory.
I have never seen an IBM system that used stock AMIBIOS-did they?
After resetting the CMOS, what if you use setup to reset to Power-On defaults (rather than standard defaults) before saving and then see if it will let you reboot.

Any changes I make, I can save and exit, it won't restart, and will try to boot. As soon as I restart (either ctrl+ alt+del or button reset) it won't show image.

If I don't change it, as soon as I exit the bios utility, it will pop up the bios screen with wait, and after a few seconds, it will show a parity error message, and it won't do anything else.

Take a look at my blog: http://rikintosh.blogspot.com
My Youtube channel: https://www.youtube.com/channel/UCfRUbxkBmEihBEkIK32Hilg

Reply 7 of 9, by Rikintosh

Posted on 2021-09-08, 03:18

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This motherboard never left this case, it is an "OEM" computer from a Brazilian manufacturer called Scopus, model nexus

https://www.youtube.com/watch?v=7ZM5jHh1Gns

Take a look at my blog: http://rikintosh.blogspot.com
My Youtube channel: https://www.youtube.com/channel/UCfRUbxkBmEihBEkIK32Hilg

Reply 8 of 9, by Eep386

Posted on 2021-09-08, 04:55

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Also, have you tried a different stick of RAM?
If you're using non-parity RAM (that is, RAM with an even number of chips per stick), then turn off Parity Generation and re-test.

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

Reply 9 of 9, by mR_Slug

Posted on 2021-09-11, 18:14

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Just wondering if the bios is original to the system?

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