The ADD instruction performs an addition without carry.
Any overflow from the addition will be passed on to the carry flag.
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The ADD instruction performs an addition without carry.
Any overflow from the addition will be passed on to the carry flag.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|
| \(A \longleftarrow A + r\) | |||||||
| ADD A, r | |||||||
| 1 | 0 | 0 | 0 | 0 | r | ||
| Register | r |
|---|---|
| B | 000 |
| C | 001 |
| D | 010 |
| E | 011 |
| H | 100 |
| L | 101 |
| A | 111 |
| Flags |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| s | set if result negative | ||||||||
| z | set if result is 0 | ||||||||
| h | set if carry from bit 3 |
| A | B | C | D | E | H | L | |
|---|---|---|---|---|---|---|---|
| A |
ADD A,A
8714 |
ADD A,B
8014 |
ADD A,C
8114 |
ADD A,D
8214 |
ADD A,E
8314 |
ADD A,H
8414 |
ADD A,L
8514 |
|
Instruction
Opcode hexSize bytesCycle count
| Register |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| \(A \longleftarrow A + n\) | ||||||||
| ADD A, n | ||||||||
| 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | C6 |
| n | ||||||||
| Flags |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| s | set if result negative | ||||||||
| z | set if result is 0 | ||||||||
| h | set if carry from bit 3 | ||||||||
| p/v | set if overflow | ||||||||
| c | set if carry from bit 7 |
| n | |
|---|---|
| A |
ADD A,n
C6nn27 |
|
Instruction
Opcode hexSize bytesCycle count
| Implicit |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| \(A \longleftarrow A + (HL)\) | ||||||||
| ADD A, (HL) | ||||||||
| 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 86 |
| \(A \longleftarrow A + (IX+d)\) | ||||||||
| ADD A, (IX+d) | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 86 |
| d | ||||||||
| \(A \longleftarrow A + (IY+d)\) | ||||||||
| ADD A, (IY+d) | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 86 |
| d | ||||||||
| Flags |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| s | set if result negative | ||||||||
| z | set if result is 0 | ||||||||
| h | set if carry from bit 3 | ||||||||
| p/v | set if overflow | ||||||||
| c | set if carry from bit 7 |
| (HL) | (IX+d) | (IY+d) | |
|---|---|---|---|
| A |
ADD A,(HL)
8617 |
ADD A,(IX+d)
DD86nn319 |
ADD A,(IY+d)
FD86nn319 |
|
Instruction
Opcode hexSize bytesCycle count
| Memory |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
|---|---|---|---|---|---|---|---|---|
| \(HL \longleftarrow HL + dd\) | ||||||||
| ADD HL, dd | ||||||||
| 0 | 0 | dd | 1 | 0 | 0 | 1 | ||
| \(IX \longleftarrow IX + pp\) | ||||||||
| ADD IX, pp | ||||||||
| 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | DD |
| 0 | 0 | pp | 1 | 0 | 0 | 1 | ||
| \(IY \longleftarrow IY + mm\) | ||||||||
| ADD IY, mm | ||||||||
| 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | FD |
| 0 | 0 | mm | 1 | 0 | 0 | 1 | ||
| Value | dd | mm | pp |
|---|---|---|---|
| 00 | BC | BC | BC |
| 01 | DE | DE | DE |
| 10 | HL | IY | IX |
| 11 | SP | SP | SP |
| Flags |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| s | set if result negative | ||||||||
| z | set if result is 0 | ||||||||
| h | set if carry from bit 11 | ||||||||
| c | set if carry from bit 15 |
| BC | DE | HL | SP | IX | IY | |
|---|---|---|---|---|---|---|
| HL |
ADD HL,BC
09111 |
ADD HL,DE
19111 |
ADD HL,HL
29111 |
ADD HL,SP
39111 |
|
|
| IX |
ADD IX,BC
DD09215 |
ADD IX,DE
DD19215 |
|
ADD IX,SP
DD39215 |
ADD IX,IX
DD29215 |
|
| IY |
ADD IY,BC
FD09215 |
ADD IY,DE
FD19215 |
|
ADD IY,SP
FD39215 |
|
ADD IY,IY
FD29215 |
|
Instruction
Opcode hexSize bytesCycle count
| Register |