Originally Posted by shattered
Using set_input_line from unmapped memory handler to trigger a bus error in the CPU isn't good enough -- it's async and bus errors can happen at insn fetch time. Worked around this for now (moved bus error tracking to machine from cpu) and some more tests are passing.

Also, DIV emulation code from SIMH apparently isn't quite right (this is a test specifically written to exercise emulation of 1801VM2):

[Linked Image from img-fotki.yandex.ru]

if that is true, you should let bob supnik know (bob
at supnik.org)