Mercurial > repos > blastem
diff z80_to_x86.c @ 335:14a937097c2b
Some Z80 interrupt fixes
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Tue, 14 May 2013 21:59:56 -0700 |
| parents | 684e71e9f0d0 |
| children | c42fae88d346 |
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--- a/z80_to_x86.c Tue May 14 00:46:34 2013 -0700 +++ b/z80_to_x86.c Tue May 14 21:59:56 2013 -0700 @@ -893,8 +893,11 @@ case Z80_EI: //TODO: Implement interrupt enable latency of 1 instruction afer EI dst = zcycles(dst, 4); + dst = mov_rrdisp8(dst, ZCYCLES, CONTEXT, offsetof(z80_context, int_enable_cycle), SZ_D); dst = mov_irdisp8(dst, 1, CONTEXT, offsetof(z80_context, iff1), SZ_B); dst = mov_irdisp8(dst, 1, CONTEXT, offsetof(z80_context, iff2), SZ_B); + //interrupt enable has a one-instruction latency, minimum instruction duration is 4 cycles + dst = add_irdisp8(dst, 4, CONTEXT, offsetof(z80_context, int_enable_cycle), SZ_D); dst = call(dst, (uint8_t *)z80_do_sync); break; case Z80_IM: