I might not be able to for a while, since my development machine is now on its last legs. I do think my change here is logically correct: NMI should be nonmaskable.

Code analysis: NMI is sourced from the E05A30, which asserts it (once) in device_reset. NMIs at reset have been known to cause problems with other CPUs (e.g. sdk85), because the internal flipflop will be set by the (synced) transition after the CPU's device_reset has already finished. Behavior may not be accurate in this particular case anyway.

Last edited by AJR; 07/12/20 06:05 PM.