Undocumented Math instructions with the IX register
Undocumented math instructions for IX register
Opcode Matrix
| INC | DEC | ADD A | ADC A | SUB | SBC A | AND | XOR | OR | CP | |
|---|---|---|---|---|---|---|---|---|---|---|
| IXh |
INC IXh
DD24 |
DEC IXh
DD25 |
ADD A,IXh
DD84 |
ADC A,IXh
DD8C |
SUB IXh
DD94 |
SBC A,IXh
DD9C |
AND IXh
DDA4 |
XOR IXh
DDAC |
OR IXh
DDB4 |
CP IXh
DDBC |
| IXl |
INC IXl
DD2C |
DEC IXl
DD2D |
ADD A,IXl
DD85 |
ADC A,IXl
DD8D |
SUB IXl
DD95 |
SBC A,IXl
DD9D |
AND IXl
DDA5 |
XOR IXl
DDAD |
OR IXl
DDB5 |
CP IXl
DDBD |
|
Instruction
Opcode hex
| Undocumented |
Last modified November 16, 2021: Optimise undocumented pages (5f13800)