OR
Binary OR
\(A \longleftarrow A \lor s\)
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| OR r | ||||||||
| 1 | 0 | 1 | 1 | 0 | r | |||
| OR n | ||||||||
| 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | F6 |
| n | ||||||||
| OR (HL) | ||||||||
| 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | B6 |
| OR (IX+d) | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | B6 |
| d | ||||||||
| OR (IY+d) | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | B6 |
| d | ||||||||
| Register | r |
|---|---|
| B | 000 |
| C | 001 |
| D | 010 |
| E | 011 |
| H | 100 |
| L | 101 |
| A | 111 |
Flags Affected
| Flags |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| s | set if result negative | ||||||||
| z | set if result is 0 | ||||||||
| h | reset | ||||||||
| p/v | set if overflow | ||||||||
| c | reset |
Opcode Matrix
| A | B | C | D | E | H | L | (HL) | (IX+d) | (IY+d) | n | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A |
OR A,A
B714 |
OR A,B
B014 |
OR A,C
B114 |
OR A,D
B214 |
OR A,E
B314 |
OR A,H
B414 |
OR A,L
B514 |
OR A,(HL)
B617 |
OR A,(IX+d)
DDB6nn319 |
OR A,(IY+d)
FDB6nn319 |
OR A,n
F6nn27 |
|
Instruction
Opcode hexSize bytesCycle count
| Register | Memory | Implicit |
Last modified November 16, 2021: Add flags to math operations (63d34c2)