First post, by x_86
First off I would like to say, "what a cool site!"
I'll keep this as short as I can (warning: can be wordy *sorry) I have also attached a photo of the board.
I've been given a stack of am386 dx-40 (soldered chip) boards. I have been doing some extensive research to figure out what these were, where they came from, and what was their intended purpose. The boards are all the same and are UMC chipset based, along with having a am386 dx-40. However, there are two extra sockets located on the boards. One socket says W3167, which I'm assuming is for a weitek processor of some sorts. The other socket, strangely enough says...PGA 80286. The closet thing I have found to this board is a board made by Computrend Systems INC, located in Taiwan. Unfortunately the board is a little different, its listed as MS-3131 Ver 1.1, and is missing the extra processor socket. Mine is MS-3131 VER:1 with an extra socket, otherwise the board layouts were pretty dead on. Also there are two youtube videos with this very board, but minus the extra processor socket. They all have a 80MHz oscillator chipped attached to the boards, they seem removable, except for two boards, which have them soldered on. Also it seems they have a 14.311818MHz oscillator as well (guessing, looks identical and same brand). I'm restoring these boards and plan on making functional systems with them, I'm hoping these are some what of a hotrod 386 board that will do well with some cool DOS games 😀 😀 😀. ANY information would be so greatly appreciated, again, I have found ZERO matching information online about these boards, or anything else like them. I have found other tri-processor UMC boards that included a soldered am386, weitek socket, BUT a 80386 port, instead of the labeling 80286 which I have.
Basically, what do I have, what kind of coprocessor should I pair with it, aaaaand whats my best performance options....?