SLA Shift bits left with Carry and store in register
Undocumented Shift bits left with carry and store in register
This instruction performs an SLA (IX+dd) or SLA (IX+dd) operation but then also stores
the result in a register as well as in the memory location.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| SLA r,(IX+d) | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | CB |
| d | ||||||||
| 0 | 0 | 1 | 0 | 0 | r | |||
| SLA r,(IY+d) | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | CB |
| d | ||||||||
| 0 | 0 | 1 | 0 | 0 | r | |||
| Register | r |
|---|---|
| B | 000 |
| C | 001 |
| D | 010 |
| E | 011 |
| H | 100 |
| L | 101 |
| A | 111 |
Note: r=%110 does exist. It doesn't do a copy into a register as it's the existing official, documented instruction.
Opcode Matrix
| A | B | C | D | E | H | L | |
|---|---|---|---|---|---|---|---|
| (IX+d) |
SLA A,(IX+d)
DDCBnn27 |
SLA B,(IX+d)
DDCBnn20 |
SLA C,(IX+d)
DDCBnn21 |
SLA D,(IX+d)
DDCBnn22 |
SLA E,(IX+d)
DDCBnn23 |
SLA H,(IX+d)
DDCBnn24 |
SLA L,(IX+d)
DDCBnn25 |
| (IY+d) |
SLA A,(IY+d)
FDCBnn27 |
SLA B,(IY+d)
FDCBnn20 |
SLA C,(IY+d)
FDCBnn21 |
SLA D,(IY+d)
FDCBnn22 |
SLA E,(IY+d)
FDCBnn23 |
SLA H,(IY+d)
FDCBnn24 |
SLA L,(IY+d)
FDCBnn25 |
|
Instruction
Opcode hex
| Undocumented |
Last modified November 16, 2021: Optimise undocumented pages (5f13800)