Reply 20 of 119, by ricardo.contieri
jakethompson1 wrote on 2020-10-09, 02:16:
There should be three extra jumpers to set for a WB CPU. I believe these connect the WB/WT#, HITM#, and CACHE# pins. You can read a bit about what changes were made to the 486 pinout to accommodate WB it here. http://datasheets.chipdb.org/SGS%20Thomson/x86/486/4193.PDF
(I kinda deserve the newbie badge!)
I have found these pages on the manual which would point differences on JP28, 29 and 30 from a standard DX4-100:
Tryed that P24D pin-out (green jumpers)
But still ended up with this:
Any suggestions on wherelse I should poke on this board?
I've also done the BIOS update for the AMI Dec 1995 version (from an Award Bios) but still no juice!