First post, by megatron-uk
I recently picked up this combo 386/486 board as 'scrap' from a Russian auction site:
It's a neat 386DX/Cx486/486DX2 combo board with up to 256KB cache. It's using the FRX46C421A chipset which is supported in 'The Last Byte'. Mine has a Am386DX-40 PLCC soldered on and the combo 486/387 socket is purely 387 only.
Initial problems:
- Battery leak
- Corrosion on keyboard connector
- Physical damage (cracked package) to a 74LS245N between ISA slot 2 and 3.
- Corrosion (rust?) on a 74LS245N in front of the SIMM sockets
- Missing/bent pins in ISA slot 3.
So far I've repaired the battery corrosion everywhere, replaced the keyboard connector and fitted new headers for the external battery connection. I've also replaced the ISA socket and fitted two new 74LS245N chips. The Jetkey keyboard controller and AMI BIOS chips had no corrosion present when they were removed, so they were just refitted after I did all the repair work.
My collection database and technical wiki:
https://www.target-earth.net