8 Bit Arithmetic
| Mnemonic | Bytes | T-States | Description |
|---|---|---|---|
| add a,r | 1 | 4 | Adds a to r and stores the result in a |
| add a,n | 2 | 7 | Adds a to n and stores the result in a |
| add a,(hl) | 1 | 7 | Adds a to (hl) and stores the result in a |
| add a,(ii + d) | 3 | 19 | Adds a to (ii + d) and stores the result in a |
| adc a,r | 1 | 4 | Adds a and the carry flag to r and stores the result in a |
| adc a,n | 2 | 7 | Adds a and the carry flag to n and stores the result in a |
| adc a,(hl) | 1 | 7 | Adds a and the carry flag to (hl) and stores the result in a |
| adc a,(ii + d) | 3 | 19 | Adds a and the carry flag to (ii + d) and stores the result in a |
| sub r | 1 | 4 | Subtracts r from a and stores the result in a |
| sub n | 2 | 7 | Subtracts n from a and stores the result in a |
| sub (hl) | 1 | 7 | Subtracts (hl) from a and stores the result in a |
| sub (ii + d) | 3 | 19 | Subtracts (ii + d) from a and stores the result in a |
| sbc a,r | 1 | 4 | Subtracts r and the value of the carry flag from a and stores the result in a |
| sbc a,n | 2 | 7 | Subtracts n and the value of the carry flag from a and stores the result in a |
| sbc a,(hl) | 1 | 7 | Subtracts (hl) and the value of the carry flag from a and stores the result in a |
| sbc a,(ii + d) | 3 | 19 | Subtracts (ii + d) and the value of the carry flag from a and stores the result in a |
| inc r | 1 | 4 | Adds 1 to r |
| inc (hl) | 1 | 11 | Adds 1 to (hl) |
| inc (ii + d) | 3 | 23 | Adds 1 to (ii + d) |
| dec r | 1 | 4 | Subtracts 1 from r |
| dec (hl) | 1 | 11 | Subtracts 1 from (hl) |
| dec (ii + d) | 3 | 23 | Subtracts 1 from (ii + d) |
| cp r | 1 | 4 | Subtracts r from a and stores the result nowhere |
| cp n | 2 | 7 | Subtracts n from a and stores the result nowhere |
| cp (hl) | 1 | 7 | Subtracts (hl) from a and stores the result nowhere |
| cp (ii + d) | 3 | 19 | Subtracts (ii + d) from a and stores the result nowhere |
16 Bit Arithmetic
| Mnemonic | Bytes | T-States | Description |
|---|---|---|---|
| add hl,dd | 1 | 11 | Adds hl to dd and stores the result in hl |
| adc hl,dd | 2 | 15 | Adds hl and the value of the carry flag to dd and stores the result in hl |
| sbc hl,dd | 2 | 15 | Subtracts dd from hl and stores the result in hl |
| add ix,pp | 2 | 15 | Adds ix to pp and stores the result in ix |
| add iy,rr | 2 | 15 | Adds iy to rr and stores the result in iy |
| inc dd | 1 | 6 | Adds 1 to dd |
| inc ii | 2 | 10 | Adds 1 to ii |
| dec dd | 1 | 6 | Subtracts 1 from dd |
| dec ii | 2 | 10 | Subtracts 1 from ii |
Logic Instructions
| Mnemonic | Bytes | T-States | Description |
|---|---|---|---|
| and r | 1 | 4 | Performs a binary and operation on a and r and stores the result in a |
| and n | 2 | 7 | Performs a binary and operation on a and n and stores the result in a |
| and (hl) | 1 | 7 | Performs a binary and operation on a and (hl) and stores the result in a |
| and (ii + d) | 3 | 19 | Performs a binary and operation on a and (ii + d) and stores the result in a |
| or r | 1 | 4 | Performs a binary or operation on a and r and stores the result in a |
| or n | 2 | 7 | Performs a binary or operation on a and n and stores the result in a |
| or (hl) | 1 | 7 | Performs a binary or operation on a and (hl) and stores the result in a |
| or (ii + d) | 3 | 19 | Performs a binary or operation on a and (ii + d) and stores the result in a |
| xor r | 1 | 4 | Performs a binary exclusive-or operation on a and r and stores the result in a |
| xor n | 2 | 7 | Performs a binary exclusive-or operation on a and n and stores the result in a |
| xor (hl) | 1 | 7 | Performs a binary exclusive-or operation on a and (hl) and stores the result in a |
| xor (ii + d) | 3 | 19 | Performs a binary exclusive-or operation on a and (ii + d) and stores the result in a |
| cpl | 1 | 4 | Stores the one's complement of a in a |
| neg | 2 | 8 | Stores the two's complement of a in a |
