lsi.txt corrects mismatch condition. When the mismatch happens, register ia saves the instruction address. However, QEMU call lsi_bad_phase first, update new dsp and
then save it into register ia. The patch correct this problem. Another fix is in the table indirect addressing. s->rbc is the same as s->dbc in direct, indirect, and table indirect mode.
I test 25 times debian installation automatically and there is no problem in scsi.