INC 16-bit Increment
Increment 16-bit register pair by 1
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| \(dd \longleftarrow dd + 1\) | ||||||||
| INC qq | ||||||||
| 0 | 0 | dd | 0 | 0 | 1 | 1 | ||
| \(IX \longleftarrow IX + 1\) | ||||||||
| INC IX | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 23 |
| \(IY \longleftarrow IY + 1\) | ||||||||
| INC IY | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 23 |
| Value | dd |
|---|---|
| 00 | BC |
| 01 | DE |
| 10 | HL |
| 11 | SP |
Flags Affected
| None. |
Opcode Matrix
| BC | DE | HL | SP | IX | IY | |
|---|---|---|---|---|---|---|
| Op |
INC BC
0316 |
INC DE
1316 |
INC HL
2316 |
INC SP
3316 |
INC IX
DD23210 |
INC IY
FD23210 |
|
Instruction
Opcode hexSize bytesCycle count
| Register |
Last modified November 16, 2021: Add flags to math operations (63d34c2)