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Originally Posted by Photon
sent it to Toni and he replied emulation is always started with fixed data - regarding this KS1.3 bug, in a real Amiga there's always some randomness. WinUAE, too, can get this randomness. It's enough to boot without the disk and insert it after the disk picture is show to introduce some, and then the bug triggers, not every time, but likely 1/227 times.
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It can happen but don't depend it. Any version update can change it. Almost anything can change it
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Is it settled by Toni's comment? I.e. reset;jmp (a0) combo must be aligned by CNOP 0,4 to not fail on 68020+?
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I didn't say it would fail. 68020 will always prefetch at least 1 word (if unaligned), jmp (a0) fits in single word: it will work even if unaligned. (at least as long as jmp(a0) is not located at the very end of memory space, where next address is some read sensitive IO..)