Mercurial > repos > blastem
changeset 1366:c74a2f31ae5f
Fix regression in horizontal interrupt timing that was breaking the "water" palette swap in the Sonic series and other games
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 22 May 2017 21:11:13 -0700 |
| parents | 6dd2c3edd0b5 |
| children | 52c99430ba5f |
| files | vdp.c |
| diffstat | 1 files changed, 7 insertions(+), 0 deletions(-) [+] |
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--- a/vdp.c Fri May 19 22:07:50 2017 -0700 +++ b/vdp.c Mon May 22 21:11:13 2017 -0700 @@ -3283,6 +3283,13 @@ if (hint_line > context->inactive_start) { return 0xFFFFFFFF; } + if (hint_line >= context->vcounter) { + //Next interrupt is for a line in the next frame that + //is higher than the line we're on now so just passing + //that line number to vdp_cycles_to_line will yield the wrong + //result + return context->cycles + vdp_cycles_to_line(context, 0) + hint_line * MCLKS_LINE - HINT_FUDGE; + } } } else { uint32_t jump_start, jump_dst;