diff options
Diffstat (limited to '')
| -rw-r--r-- | src/cpu/interrupt.ts | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/cpu/interrupt.ts b/src/cpu/interrupt.ts index 1c7d835..1bfa035 100644 --- a/src/cpu/interrupt.ts +++ b/src/cpu/interrupt.ts @@ -12,7 +12,10 @@ export function avrInterrupt(cpu: ICPU, addr: number) { const sp = cpu.dataView.getUint16(93, true); cpu.data[sp] = cpu.pc & 0xff; cpu.data[sp - 1] = (cpu.pc >> 8) & 0xff; - cpu.dataView.setUint16(93, sp - 2, true); + if (cpu.pc22Bits) { + cpu.data[sp - 2] = (cpu.pc >> 16) & 0xff; + } + cpu.dataView.setUint16(93, sp - (cpu.pc22Bits ? 3 : 2), true); cpu.data[95] &= 0x7f; // clear global interrupt flag cpu.cycles += 2; cpu.pc = addr; |