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comparison z80_to_x86.c @ 1903:62166274e6c0

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Fix edge case in Z80 interrupt handling. Fixes music in Metal Blast 2277
author Michael Pavone <pavone@retrodev.com>
date Tue, 25 Feb 2020 20:03:04 -0800
parents 37afb9cf58be
children 6fdac0108e47
comparison
equal deleted inserted replaced
1902:32a3aa7b4a45 1903:62166274e6c0
3410 3410
3411 options->gen.handle_cycle_limit_int = code->cur; 3411 options->gen.handle_cycle_limit_int = code->cur;
3412 neg_r(code, options->gen.cycles, SZ_D); 3412 neg_r(code, options->gen.cycles, SZ_D);
3413 add_rdispr(code, options->gen.context_reg, offsetof(z80_context, target_cycle), options->gen.cycles, SZ_D); 3413 add_rdispr(code, options->gen.context_reg, offsetof(z80_context, target_cycle), options->gen.cycles, SZ_D);
3414 cmp_rdispr(code, options->gen.context_reg, offsetof(z80_context, int_cycle), options->gen.cycles, SZ_D); 3414 cmp_rdispr(code, options->gen.context_reg, offsetof(z80_context, int_cycle), options->gen.cycles, SZ_D);
3415 jcc(code, CC_B, skip_int);
3416 //check that we are not past the end of interrupt pulse
3417 cmp_rrdisp(code, options->gen.cycles, options->gen.context_reg, offsetof(z80_context, int_pulse_end), SZ_D);
3415 jcc(code, CC_B, skip_int); 3418 jcc(code, CC_B, skip_int);
3416 //set limit to the cycle limit 3419 //set limit to the cycle limit
3417 mov_rdispr(code, options->gen.context_reg, offsetof(z80_context, sync_cycle), options->gen.scratch2, SZ_D); 3420 mov_rdispr(code, options->gen.context_reg, offsetof(z80_context, sync_cycle), options->gen.scratch2, SZ_D);
3418 mov_rrdisp(code, options->gen.scratch2, options->gen.context_reg, offsetof(z80_context, target_cycle), SZ_D); 3421 mov_rrdisp(code, options->gen.scratch2, options->gen.context_reg, offsetof(z80_context, target_cycle), SZ_D);
3419 neg_r(code, options->gen.cycles, SZ_D); 3422 neg_r(code, options->gen.cycles, SZ_D);