A collection of motherboards, mostly partly- or non-functional.
Physically large, this is quite a motherboard. It doesn't work currently, there's a short somewhere on the board and the PSU overcurrent protection just trips. Fitted with a 10MHz Intel 286. Now sold.
Decoding the BIOS string with the help of https://www.wimsbios.com/aminumbers.jsp shows it to be an ECS motherboard. I'm not sure whether it was for PC use or whether it was a special as the only info I've found about it on the web suggests it might be from a Milltronics product - could it be from a CNC milling machine? It's got a soldered-on AMD 386SX-33 and has a pleasingly small baby AT form factor. Using two good 1MB SIMMs it can only see 1792kB, this represents a missing 256kB. Adding another 2MB resuts in it seeing 3840kB, still missing 256kB, so I assume the missing 256kB must be memory mapped I/O for something, perhaps related to the Milltronics application.
This seems like it should be a nice motherboard, it has cache RAM and all 16 SIMM slots are on an expansion card. Currently fitted with an Intel 386DX-33. Unfortunately the test PSU overcurrent protection trips as soon as power is supplied. I've removed the only fully shorted tant, but it looks like others are breaking down as soon as voltage is applied, so I'm working through them at the moment.
Bought on ebay for 1GBP, this came with a non-MMX Pentium 200MHz CPU, 64MB of RAM in SIMMS, and has onboard sound and ATI Rage 3D graphics. This has the makings of a very nice Pentium PC, and I'm thinking of making a custom shallow case for it using a slim Sun PSU I've got which should be fine with the right connectors fitted.
