I have dumped the rom with my minipro tl866cs programmer.

Upgraded this board as well from the stock 64kb of 20ns cache to 128Kb of 15ns cache (dont know if it will make sense to upgrade it later to 256kb.. Iam only going 100% working with 8MB memory at max.
Also added a 386 math co processor to this motherboard.

Picture of the board i can make later.
I also have a second one here, but that one needs to have a repair due battery leakage.. I dont know how much it damaged. But damaged looks small on my eyes.

Here it is on stason.org:

https://stason.org/TULARC/pc/motherboards/A/A … 1-TAM-40-U.html

And bios rom is included here:

eprom which used is a Texas instruments 27c512-15 (even and odd seems to be on one eprom)