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DUEL halt bug #57

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dbalsom opened this issue Aug 22, 2023 · 1 comment
Open

DUEL halt bug #57

dbalsom opened this issue Aug 22, 2023 · 1 comment
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dbalsom commented Aug 22, 2023

Seen on twitter:
https://twitter.com/sonneveld/status/1682635904824016896

From the disassembly, that sure is a lot of halts. MartyPC only halts in an error state if the interrupt flag is disabled, since an interrupt is the only thing that can resume from halt.

Need to investigate.
@dbalsom dbalsom added the bug Something isn't working label Aug 22, 2023
@dbalsom dbalsom self-assigned this Aug 22, 2023
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dbalsom commented Dec 28, 2023

After a bit of research, it would seem DUEL requires simulation of floppy drive access timings - it is not happy with a virtual floppy that seeks/reads instantly. I anticipated there would be some titles that used this method for copy protection.

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