Reply 280 of 283, by LocalBus
So the P54CS SY045 CPU (i200) arrived and it works just fine at 1.5x and 2x 66 MHz. The BIOS report it as P100 while running at 133 MHz.
At 2.5x and 3.0x multiplier it does not POST. Time for the trusty POST code analyzer --> no code.
Could a BIOS update do anything about this situation or other aspects at play?
JP2 and JP3 goes to BF0 and BF1 respectively. JP1 goes to PICD1. Jumper closed means tied to GND for these three.
EDIT: My bad, JP3 goes to STPCLK# so no wonder it does not run with this jumper closed. Interesting design choice... 🤔
So need to ground BF1 then. Will try to install this neatly with a switch or similar.