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Help Identifying UMC 486 SBC Motherboard

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First post, by ajacocks

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I just acquired this UMC-based SBC 486 motherboard, from eBay:

The attachment D3D2D857-B40F-4F1C-AE39-3871DFCCC259.jpeg is no longer available

And here is the back:

The attachment 646FD4AF-CB41-4E38-AE9E-05CB9B64DBF0.jpeg is no longer available

It came among with this attached VGA card:

The attachment 219FD2B3-76BD-4FED-8A8C-CF9650F00A1C.jpeg is no longer available

The only label on the board is INS-UMB486DX/LAN/CACHE. I’m guessing that “INS” is either the manufacturer, or a shortened version of “industrial single board computer.” Neither the LAN nor the cache options seem to be populated, on the board. The board has jumper settings for CPU speeds between 20 and 80 MHz.

Any suggestions are welcome. I can figure out most of the headers, but some are mysterious.

- Alex

Reply 1 of 3, by Warlord

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Sick, those headers are for modules, theres probably seperate lan and cache modules. I looked everywhere, I tried searching for the VGA part number and came up with nothing as well.

Searching for PTP MV-1 I get alot of results. So I guess PTP is the manufacturer of the PCB anyways.

Reply 2 of 3, by ajacocks

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Here is the location (I think) for the unpopulated RJ45 port, and the onboard LAN IC:

The attachment 480817C5-51E2-4E95-9B3E-3D9C2D0DE13E.jpeg is no longer available

The missing cache, I believe, would be here:

The attachment B1F2CB6B-75D0-4D48-9A08-927A85F85122.jpeg is no longer available

- Alex

Reply 3 of 3, by ajacocks

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Has anyone seen anything similar?

- Alex

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