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Adventech PCA-6147 386/486 Rev.B2 documention for jumpers and dip switch settings needed.

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First post, by pentiumspeed

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I recently contacted Adventech and they stated don't have the documentation. But I'm asking for any hopes in their email again, explaining about few reasons about vintage computing and PCA-6147 turns up frequently on auction sites so people wanted this if they have it.

This SBC board has 3 unique features. One it has onboard 3.3V regulator *and* 3.3V power input, for low voltage 486 processors, secondly, cache has dual tag with 256K soldered on. Finally this board has solder pads for SMD 386DX. The main chipset is SiS 461.

For this reason, I cannot blindly insert the 486 processor without knowing what card was set up for specific processor.

Cheers,

Great Northern aka Canada.

Reply 1 of 6, by Horun

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Hmm the archives have PCA-6143, 6144, 6145, then skips to 6148 and 6149. Maybe that is why they cannot find the manual either. Odd 6145 is dated 2000 but 6148 is 1995....

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 6, by PC Hoarder Patrol

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It is listed on their US & Taiwan archive sites (no manual or support files though) and a manual did exist (global ftp search finds PCA-6147.PDF) but seemingly no longer reachable 🙁

Reply 3 of 6, by Horun

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I looked but never saw it on either site looking from about 1997 to about 2001. Did find a spec sheet off a 1994 Gov PDF with it and the 6146 listed, it even has some jumper settings for the 6146 but not the 6147 in the full Gov pdf.
And this more recent FAQ about clearing PWD or reset cmos: https://www.advantech.com/en-us/support/detai … aq?id=1+FY+1354

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 5 of 6, by Horun

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Thanks ! for some reason was getting lots of server errors/pages not found from archive org last few days...

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 6 of 6, by pentiumspeed

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Update:
Using auction and web looked at photos with different CPUs in use, I got some limited jumper layouts including jumpers with the soldered Am386DX-40. Then 2 more: One is Ti DX2-80, one is Intel DX4-100 but don't know if CPU is &EW or not. I'm referring to write-back and write-through modes.

I already have the datasheet for the clock generator IC. Two jumper block in use but there is 3rd clock selection but not used nor a space for jumper. The doc was useful. 25, 33, 40 and 50MHz.

Since this is a SiS 461 chipset, is this possible to map more jumpers settings by looking at connections between 486 CPU socket and the SiS chipset?

At least about 15 or 20 SBC cards is visible on websites including auction sites for PCA-6147 (486 version) and occasional PCA-6137 that has soldered 386DX-40 but the socket takes 387 coprocessor and 486 and yes there is a jumper next to the 386 to disable it.

But cost is too high, and majority of these have no 486 processor installed. I was lucky to get mine cheaply.

Cheers,

Great Northern aka Canada.

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