One for 680x0 experts - move16 issues...

[itix]

I vaguely remember that move16 instruction was buggy on some 040 chips. Couldnt find anything from google though.

But it could be a cache issue?

[itix]

@mdma

Found this from the article:

there’s a bug in some early versions of the 68040 chip (including some shipped Quadras) that requires you to use a Nop instruction before any set of Move16 instructions. The problem is that if you have a pending write to an address subsequently referenced by a Move16 instruction that executes before the pending write completes you’ll get bogus data.

[itix]

Heh. After reading that article I feel MacOS classic is piece of {bleep} :-D