diff options
Diffstat (limited to 'src/instruction.ts')
| -rw-r--r-- | src/instruction.ts | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/instruction.ts b/src/instruction.ts index f7789d2..63c4caa 100644 --- a/src/instruction.ts +++ b/src/instruction.ts @@ -425,7 +425,7 @@ export function avrInstruction(cpu: ICPU) { /* STX */ if ((opcode & 0xfe0f) === 0x920c) { - /* not implemented */ + cpu.writeData(cpu.dataView.getUint16(26, true), cpu.data[(opcode & 0x1f0) >> 4]); } /* STX */ @@ -436,7 +436,10 @@ export function avrInstruction(cpu: ICPU) { /* STX */ if ((opcode & 0xfe0f) === 0x920e) { - /* not implemented */ + const i = cpu.data[(opcode & 0x1f0) >> 4]; + cpu.dataView.setUint16(26, cpu.dataView.getUint16(26, true) - 1, true); + cpu.writeData(cpu.dataView.getUint16(26, true), i); + cpu.cycles++; } /* STY */ |