CP
Comparison
\(A - s\)
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| CP r | ||||||||
| 1 | 0 | 1 | 1 | 1 | r | |||
| CP n | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | FE |
| n | ||||||||
| CP (HL) | ||||||||
| 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | BE |
| CP (IX+d) | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | BE |
| d | ||||||||
| CP (IY+d) | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | BE |
| 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 | set if borrow from bit 4 | ||||||||
| p/v | set if overflow | ||||||||
| c | set if borrow |
Opcode Matrix
| A | B | C | D | E | H | L | (HL) | (IX+d) | (IY+d) | n | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Op |
CP A
BF14 |
CP B
B814 |
CP C
B914 |
CP D
BA14 |
CP E
BB14 |
CP H
BC14 |
CP L
BD14 |
CP (HL)
BE17 |
CP (IX+d)
DDBEnn319 |
CP (IY+d)
FDBEnn319 |
CP n
FEnn27 |
|
Instruction
Opcode hexSize bytesCycle count
| Register | Memory | Implicit |
Last modified November 16, 2021: Add flags to math operations (63d34c2)