3 ms·
I agree with the first comment there, that it's important to know which revision of the 386 this came from, since the 386 did receive many small changes over it
by userbinator 5mo ago
I agree with the first comment there, that it's important to know which revision of the 386 this came from, since the 386 did receive many small changes over its 22-year production run.
- rep_lodsb 5mo agoWell, one indication is the value loaded into EDX on reset: 9B5 BIST1 -> TMPD 0x0303 PASS2 9B6 SIGMA -> EDX 9B7 BIST2 -> TMPE TMPD XOR 9B8 SIGMA 0x3ddc0c2c XOR 9B9 SIGMA -> EAX BOOTUP_JUMP JFPUOK 0x303 = family 3, model 0, stepping id 3.
- userbinator 5mo agoThat's either a B0 or B1 according to https://www.pcjs.org/documents/manuals/intel/80386/ https://www.pcjs.org/documents/manuals/intel/80386/ , or an A3 according to https://www.geoffchappell.com/studies/windows/km/cpu/precpuid.htm https://www.geoffchappell.com/studies/windows/km/cpu/precpui... , all of which are very buggy.