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40 lines
483 B
C
40 lines
483 B
C
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/*
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* mos6502.exec.c
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*/
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#include "mos6502.h"
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#include "mos6502.enums.h"
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DEFINE_INST(brk)
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{
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cpu->P |= INTERRUPT;
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mos6502_push_stack(cpu, cpu->PC);
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cpu->PC += 2;
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}
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DEFINE_INST(jmp)
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{
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cpu->PC = cpu->last_addr;
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}
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DEFINE_INST(jsr)
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{
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mos6502_push_stack(cpu, cpu->PC + 2);
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cpu->PC = cpu->last_addr;
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}
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DEFINE_INST(nop)
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{
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// do nothing
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}
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DEFINE_INST(rti)
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{
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cpu->PC = mos6502_pop_stack(cpu);
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}
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DEFINE_INST(rts)
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{
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cpu->PC = mos6502_pop_stack(cpu);
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}
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