The board is missing the 8042 KBC, the two bios chips (hi and lo) and the 286 cpu. Also needs ram, either 41256 or 411000 dips OR 1Mb 30pin SIPPS. Chipset says 16mhz but it has a 40mhz crystal,seems odd.
It looks very similar to a Protek board that someone was looking for info a few years ago but none was found iirc

FYI the brand "Chips" 82C206 has nothing to do with the brand "pc chips" AFAIK.

For an AT-compatible 286 (like this) I do think you should be able to get away with any keyboard controller.

From what I've read they can get more specific when you get into thinks like PS/2 mouse, turbo switching through software (maybe you do care about that one), and especially, power management.

AMIBIOS will query the KBC to determine whether it's an AMI one, and if it is, append the KBC version number to the POST string at the bottom.

Thank you the replies! I am going to source the missing parts to move forward.

One question regarding the on board memory: how the SIPP memories can be used? Only SIPPs or the DIP memory chips separately or can it be mixed? If SIPP can be used alone than I would go to this direction instead of the DIP memories. Using the 30pin SIMM memory socket inserted into the SIPP socket would result an easier solution.

By the way I found the close "sibling" MB for this board. I am going to use its BIOS as a try. https://theretroweb.com/motherboards/s/caching-tech-cor-n286. There are some component placement differencies but it seems a close match. Some investigation will be needed to figure out the jumpers because the jumper configurations is quite different in my board.

Regarding the bios: it is a bit strange both files are 66KB size. I assume it should not be larger than 64KB burned into a 27c512 based on th DIP28 socket size. How the 66KB will fit into 64KB Eprom?

weedeewee wrote on 2024-07-13, 21:08:

FYI the brand "Chips" 82C206 has nothing to do with the brand "pc chips" AFAIK.

correct, that is a Chips & Tech chipset.

https://en.wikipedia.org/wiki/Chips_and_Technologies

the chip in question is from the NEAT chipset. IIRC, there are utilities available to control this chipset to do arbitrary memory paging and shadowing in the adapter region, including EMS functions.

Yup, found it (them)
https://www.dosdays.co.uk/topics/neat_chipset.php

The datasheet (http://bitsavers.informatik.uni-stuttgart.de/ … Book_198710.pdf, p. 39) suggests that the chipset supports up to a maximum of 8MB memory, in four banks of 2MB each.

It takes 18 DIPs or two SIPPs to make one bank. So if you had all the DIPs filled with 1Mx1 chips, plus four 1MB SIPPs, you would have 8MB RAM. Unless this board is wired completely differently than that.

jakethompson1 wrote on 2024-07-15, 23:52:

The datasheet (http://bitsavers.informatik.uni-stuttgart.de/ … Book_198710.pdf, p. 39) suggests that the chipset supports up to a maximum of 8MB memory, in four banks of 2MB each.

It takes 18 DIPs or two SIPPs to make one bank. So if you had all the DIPs filled with 1Mx1 chips, plus four 1MB SIPPs, you would have 8MB RAM. Unless this board is wired completely differently than that.

Thank you the info. I ordered some DIM memories, Eproms, SIMM sockets for the SIPP and I have 1MB SIMMs. I will try out the expandability. 8MB in a 80286 MB? Incredible. What could be the price of 8MB at that time? About 1986-89?

wierd_w wrote on 2024-07-15, 23:47:

correct, that is a Chips & Tech chipset. […]
Show full quote

weedeewee wrote on 2024-07-13, 21:08:

FYI the brand "Chips" 82C206 has nothing to do with the brand "pc chips" AFAIK.

correct, that is a Chips & Tech chipset.

https://en.wikipedia.org/wiki/Chips_and_Technologies

the chip in question is from the NEAT chipset. IIRC, there are utilities available to control this chipset to do arbitrary memory paging and shadowing in the adapter region, including EMS functions.

Yup, found it (them)
https://www.dosdays.co.uk/topics/neat_chipset.php

Thank you the info!

mita wrote on 2024-07-16, 06:40:

jakethompson1 wrote on 2024-07-15, 23:52:

The datasheet (http://bitsavers.informatik.uni-stuttgart.de/ … Book_198710.pdf, p. 39) suggests that the chipset supports up to a maximum of 8MB memory, in four banks of 2MB each.

It takes 18 DIPs or two SIPPs to make one bank. So if you had all the DIPs filled with 1Mx1 chips, plus four 1MB SIPPs, you would have 8MB RAM. Unless this board is wired completely differently than that.

Thank you the info. I ordered some DIM memories, Eproms, SIMM sockets for the SIPP and I have 1MB SIMMs. I will try out the expandability. 8MB in a 80286 MB? Incredible. What could be the price of 8MB at that time? About 1986-89?

You found 30pin simm sockets ? Care to divulge where ?

Ebay has some reasonably priced (considering unobtanium new) NOS ones.
https://www.ebay.com/itm/122004729920

wierd_w wrote on 2024-07-16, 17:27:

Ebay has some reasonably priced (considering unobtanium new) NOS ones.
https://www.ebay.com/itm/122004729920

ah yes, I keep forgetting that sometimes they show up there.

weedeewee wrote on 2024-07-16, 15:59:

mita wrote on 2024-07-16, 06:40:

jakethompson1 wrote on 2024-07-15, 23:52:

The datasheet (http://bitsavers.informatik.uni-stuttgart.de/ … Book_198710.pdf, p. 39) suggests that the chipset supports up to a maximum of 8MB memory, in four banks of 2MB each.

It takes 18 DIPs or two SIPPs to make one bank. So if you had all the DIPs filled with 1Mx1 chips, plus four 1MB SIPPs, you would have 8MB RAM. Unless this board is wired completely differently than that.

Thank you the info. I ordered some DIM memories, Eproms, SIMM sockets for the SIPP and I have 1MB SIMMs. I will try out the expandability. 8MB in a 80286 MB? Incredible. What could be the price of 8MB at that time? About 1986-89?

You found 30pin simm sockets ? Care to divulge where ?

The last item the SIMM socket on my shopping list. It seemed I will be able to get in within Hungary but it never happened. I could order from Italy on ebay but but it is turned out the solder pins of the SIMM sockets are too small in diameter and the connections with the SIP socket is very lousy. I decided to desolder some SIMM sockets from a donor board, desolder the SIPP sockets from the target board and replace them with the SIMM sockets.
I am not dare to start this soldering without a desoldering gun so I opened a side project to build one. I think this tool is one of the most important one for diy retro repairs. Diy beause it is fun. Buying is easy. Building and programming is a challenge.