The bootblock is now feature complete and I'm prettifying it without going over 1K.
My question in OP was based on emulation behavior, so it is answered by this:
Quote:
Originally Posted by Toni Wilen
Sounds like you trigger KS 1.3 bug, there is always 1/227 chance of NTSC misdetection.
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I 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.
I also wanted to ask about these two comments seen together:
Quote:
Originally Posted by Toni Wilen
68020+ prefetch long words. If unaligned, it still prefetches full long from aligned address (=address - 2).
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Quote:
Originally Posted by a/b
Wasn't that debunked?
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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+?