diff options
Diffstat (limited to '')
| -rw-r--r-- | src/instruction.ts | 43 |
1 files changed, 33 insertions, 10 deletions
diff --git a/src/instruction.ts b/src/instruction.ts index 8e52a80..6eafb19 100644 --- a/src/instruction.ts +++ b/src/instruction.ts @@ -452,42 +452,65 @@ export function avrInstruction(cpu: ICPU) { /* STY, 1000 001r rrrr 1000 */ if ((opcode & 0xfe0f) === 0x8208) { - /* not implemented */ + cpu.writeData(cpu.dataView.getUint16(28, true), cpu.data[(opcode & 0x1f0) >> 4]); } /* STY, 1001 001r rrrr 1001 */ if ((opcode & 0xfe0f) === 0x9209) { - /* not implemented */ + const i = cpu.data[(opcode & 0x1f0) >> 4]; + const y = cpu.dataView.getUint16(28, true); + cpu.writeData(y, i); + cpu.dataView.setUint16(28, y + 1, true); } /* STY, 1001 001r rrrr 1010 */ if ((opcode & 0xfe0f) === 0x920a) { - /* not implemented */ + const i = cpu.data[(opcode & 0x1f0) >> 4]; + const y = cpu.dataView.getUint16(28, true) - 1; + cpu.dataView.setUint16(28, y, true); + cpu.writeData(y, i); + cpu.cycles++; } - /* STY, 10q0 qq1r rrrr 1qqq */ + /* STDY, 10q0 qq1r rrrr 1qqq */ if ((opcode & 0xd208) === 0x8208) { - /* not implemented */ + cpu.writeData( + cpu.dataView.getUint16(28, true) + + ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)), + cpu.data[(opcode & 0x1f0) >> 4] + ); + cpu.cycles++; } /* STZ, 1000 001r rrrr 0000 */ if ((opcode & 0xfe0f) === 0x8200) { - /* not implemented */ + cpu.writeData(cpu.dataView.getUint16(30, true), cpu.data[(opcode & 0x1f0) >> 4]); } /* STZ, 1001 001r rrrr 0001 */ if ((opcode & 0xfe0f) === 0x9201) { - /* not implemented */ + const z = cpu.dataView.getUint16(30, true); + cpu.writeData(z, cpu.data[(opcode & 0x1f0) >> 4]); + cpu.dataView.setUint16(30, z + 1, true); } /* STZ, 1001 001r rrrr 0010 */ if ((opcode & 0xfe0f) === 0x9202) { - /* not implemented */ + const i = cpu.data[(opcode & 0x1f0) >> 4]; + const z = cpu.dataView.getUint16(30, true) - 1; + cpu.dataView.setUint16(30, z, true); + cpu.writeData(z, i); + cpu.cycles++; } - /* STZ, 10q0 qq1r rrrr 0qqq */ + /* STDZ, 10q0 qq1r rrrr 0qqq */ if ((opcode & 0xd208) === 0x8200) { - /* not implemented */ + cpu.writeData( + cpu.dataView.getUint16(30, true) + + ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)), + cpu.data[(opcode & 0x1f0) >> 4] + ); + cpu.cycles++; } /* SUB, 0001 10rd dddd rrrr */ |