First post, by rpocc
I've got this board for parts with a set of other mostly dead motherboards, wasn't able to start it up with 486DX2-66 and probably going to extract some parts out of it, but maybe I've found something very rare?
I'm out of ideas of how to identify it.
Images attached.
1. The most similar MB to this one is MB for IBM Valuepoint series PS/2, listed here:
https://theretroweb.com/motherboards/s/ibm-ps … 472,-6482,-6484
2. There are differences in layout and the most important difference is the obscure 112-pin slot marked Cache Slot. I wasn't able to find any information on this type of slot.
3. At least there is no any documentation on this board on theretroweb. There is only one 6-pin jumper marked J53V and when I've tried moving jumper from 1-2 to 2-3 and started it up, SUDDENLY it blown up the fuse in my test PSU. I've stopped further attempts to start it up.
4. It has Flash dual BIOS, Intel P28F001BX-T-150. The contents are attached.
The first half contains BIOS for Trio64 VGA integrated video, the second half consists of IBM BIOS. The only interesting strings I've found are these:
19551H: "AJAX for Pecan"
1402BH: "NCR BIOS Version . (., .)...!!! Pre-release version / for evaluation only !!!...QPS"
So, what are your thoughts on this board? Maybe I should keep it for history? The problem is that I can't even insert a post-card because I have no such type of riser.