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.
9B5 BIST1 -> TMPD 0x0303 PASS2
9B6 SIGMA -> EDX
9B7 BIST2 -> TMPE TMPD XOR
9B8 SIGMA 0x3ddc0c2c XOR
9B9 SIGMA -> EAX BOOTUP_JUMP JFPUOK