I thought I'd search thew forum before posting for help, this thread is similar but not quite the same:
https://www.vintage-radio.net/forum/...41&postcount=1
I'm also trying to get a 486-based machine working which has also lost its BIOS settings due to a flat bios battery.
This one says something along the lines of 'cmos battery error - default settings loaded..press CTRL-ALT-DEL to continue'.
The PC keyboard however is not used, and instead the MB provides the connector shown in the photo. I'm thinking if I can figure out how to connect the keyboard to this header, the rest will be easy.
The VGA monitor is also connected via a MB header, but luckily there is a coiled-up cable in the enclosure with the header at one end and the HD15 vga connector at the other.
So...my question is, might there be a way to 'scope' or trace out the keyboard pin out on this header? Other facilities on the header include the reset switch, keyboard disable switch and a programmable button matrix.