Z80 instruction set
This is an overview of the Z80 instruction set. Undocumented instructions are included (note that Sean Young wrote an extensive document about them), and the R800 instructions MULUB and MULUW as well as R800 timing information.
Important note: the timings in this list are excluding the so-called M1 waits specific to the MSX. What happens is that the MSX engine adds one additional wait state to every M1 cycle (the first or first two cycles of an instruction). This is an important trait to know about if you want to do speed calculations, for example. The M1 waits are inserted like this:
- Every instruction has 1 additional M1 wait state
- Instructions starting with a CB, DD, ED, FD, DDCB or DDFD opcode have two additional M1 wait states
Examples:
- XOR A has opcode AF and is documented as taking 4 T-states. On MSX, it takes 5 (one more).
- BIT 0,A has opcode CB 47 and is documented as taking 12 T-states. On MSX, it takes 14 (two more).
- SRL (IX+0) has opcode DD CB 00 3E and is documented as taking 23 T-states. On MSX, it takes 25 (two more).
For the R800, it is an even more complex story (Warning: preliminary info! To be frank, this is just a guess/indication. I need to verify!):
- In internal RAM, 0 wait states are inserted, and an additional wait state for every memory access where the MSB changes (far).
- In external RAM, 2 wait states are inserted.
- In ROM, 3 wait states are inserted.
- For every far memory fetch, additional wait states are inserted depending on the memory type.
Well, here's the list:
| Instruction | Timing Z80 |
Timing R800 |
Opcode | Size |
|---|---|---|---|---|
| ADC A,(HL) | 7 | 2 | 8E | 1 |
| ADC A,(IX+o) | 19 | 5 | DD 8E oo | 3 |
| ADC A,(IY+o) | 19 | 5 | FD 8E oo | 3 |
| ADC A,n | 7 | 2 | CE nn | 2 |
| ADC A,r | 4 | 1 | 88+r | 1 |
| ADC A,IXp | 8 | 2 | DD 88+p | 2 |
| ADC A,IYq | 8 | 2 | FD 88+q | 2 |
| ADC HL,BC | 15 | 2 | ED 4A | 2 |
| ADC HL,DE | 15 | 2 | ED 5A | 2 |
| ADC HL,HL | 15 | 2 | ED 6A | 2 |
| ADC HL,SP | 15 | 2 | ED 7A | 2 |
| ADD A,(HL) | 7 | 2 | 86 | 1 |
| ADD A,(IX+o) | 19 | 5 | DD 86 oo | 3 |
| ADD A,(IY+o) | 19 | 5 | FD 86 oo | 3 |
| ADD A,n | 7 | 2 | C6 nn | 2 |
| ADD A,r | 4 | 1 | 80+r | 1 |
| ADD A,IXp | 8 | 2 | DD 80+p | 2 |
| ADD A,IYq | 8 | 2 | FD 80+q | 2 |
| ADD HL,BC | 11 | 1 | 09 | 1 |
| ADD HL,DE | 11 | 1 | 19 | 1 |
| ADD HL,HL | 11 | 1 | 29 | 1 |
| ADD HL,SP | 11 | 1 | 39 | 1 |
| ADD IX,BC | 15 | 2 | DD 09 | 2 |
| ADD IX,DE | 15 | 2 | DD 19 | 2 |
| ADD IX,IX | 15 | 2 | DD 29 | 2 |
| ADD IX,SP | 15 | 2 | DD 39 | 2 |
| ADD IY,BC | 15 | 2 | FD 09 | 2 |
| ADD IY,DE | 15 | 2 | FD 19 | 2 |
| ADD IY,IY | 15 | 2 | FD 29 | 2 |
| ADD IY,SP | 15 | 2 | FD 39 | 2 |
| AND (HL) | 7 | 2 | A6 | 1 |
| AND (IX+o) | 19 | 5 | DD A6 oo | 3 |
| AND (IY+o) | 19 | 5 | FD A6 oo | 3 |
| AND n | 7 | 2 | E6 nn | 2 |
| AND r | 4 | 1 | A0+r | 1 |
| AND IXp | 8 | 2 | DD A0+p | 2 |
| AND IYq | 8 | 2 | FD A0+q | 2 |
| BIT b,(HL) | 12 | 3 | CB 46+8*b | 2 |
| BIT b,(IX+o) | 20 | 5 | DD CB oo 46+8*b | 4 |
| BIT b,(IY+o) | 20 | 5 | FD CB oo 46+8*b | 4 |
| BIT b,r | 8 | 2 | CB 40+8*b+r | 2 |
| CALL nn | 17 | 5 | CD nn nn | 3 |
| CALL C,nn | 17/10 | 5/3 | DC nn nn | 3 |
| CALL M,nn | 17/10 | 5/3 | FC nn nn | 3 |
| CALL NC,nn | 17/10 | 5/3 | D4 nn nn | 3 |
| CALL NZ,nn | 17/10 | 5/3 | C4 nn nn | 3 |
| CALL P,nn | 17/10 | 5/3 | F4 nn nn | 3 |
| CALL PE,nn | 17/10 | 5/3 | EC nn nn | 3 |
| CALL PO,nn | 17/10 | 5/3 | E4 nn nn | 3 |
| CALL Z,nn | 17/10 | 5/3 | CC nn nn | 3 |
| CCF | 4 | 1 | 3F | 1 |
| CP (HL) | 7 | 2 | BE | 1 |
| CP (IX+o) | 19 | 5 | DD BE oo | 3 |
| CP (IY+o) | 19 | 5 | FD BE oo | 3 |
| CP n | 7 | 2 | FE nn | 2 |
| CP r | 4 | 1 | B8+r | 1 |
| CP IXp | 8 | 2 | DD B8+p | 2 |
| CP IYq | 8 | 2 | FD B8+q | 2 |
| CPD | 16 | 4 | ED A9 | 2 |
| CPDR | 21/16 | 4 | ED B9 | 2 |
| CPI | 16 | 4 | ED A1 | 2 |
| CPIR | 21/16 | 4 | ED B1 | 2 |
| CPL | 4 | 1 | 2F | 1 |
| DAA | 4 | 1 | 27 | 1 |
| DEC (HL) | 11 | 4 | 35 | 1 |
| DEC (IX+o) | 23 | 7 | DD 35 oo | 3 |
| DEC (IY+o) | 23 | 7 | FD 35 oo | 3 |
| DEC A | 4 | 1 | 3D | 1 |
| DEC B | 4 | 1 | 05 | 1 |
| DEC BC | 6 | 1 | 0B | 1 |
| DEC C | 4 | 1 | 0D | 1 |
| DEC D | 4 | 1 | 15 | 1 |
| DEC DE | 6 | 1 | 1B | 1 |
| DEC E | 4 | 1 | 1D | 1 |
| DEC H | 4 | 1 | 25 | 1 |
| DEC HL | 6 | 1 | 2B | 1 |
| DEC IX | 10 | 2 | DD 2B | 2 |
| DEC IY | 10 | 2 | FD 2B | 2 |
| DEC IXp | 8 | 2 | DD 05+8*p | 2 |
| DEC IYq | 8 | 2 | FD 05+8*q | 2 |
| DEC L | 4 | 1 | 2D | 2 |
| DEC SP | 6 | 1 | 3B | 1 |
| DI | 4 | 2 | F3 | 1 |
| DJNZ o | 13/8 | 2 | 10 oo | 2 |
| EI | 4 | 1 | FB | 1 |
| EX (SP),HL | 19 | 5 | E3 | 1 |
| EX (SP),IX | 23 | 6 | DD E3 | 2 |
| EX (SP),IY | 23 | 6 | FD E3 | 2 |
| EX AF,AF' | 4 | 1 | 08 | 1 |
| EX DE,HL | 4 | 1 | EB | 1 |
| EXX | 4 | 1 | D9 | 1 |
| HALT | 4 | 2 | 76 | 1 |
| IM 0 | 8 | 3 | ED 46 | 2 |
| IM 1 | 8 | 3 | ED 56 | 2 |
| IM 2 | 8 | 3 | ED 5E | 2 |
| IN A,(C) | 12 | 3 | ED 78 | 2 |
| IN A,(n) | 11 | 3 | DB nn | 2 |
| IN B,(C) | 12 | 3 | ED 40 | 2 |
| IN C,(C) | 12 | 3 | ED 48 | 2 |
| IN D,(C) | 12 | 3 | ED 50 | 2 |
| IN E,(C) | 12 | 3 | ED 58 | 2 |
| IN H,(C) | 12 | 3 | ED 60 | 2 |
| IN L,(C) | 12 | 3 | ED 68 | 2 |
| IN F,(C) | 12 | 3 | ED 70 | 3 |
| INC (HL) | 11 | 4 | 34 | 1 |
| INC (IX+o) | 23 | 7 | DD 34 oo | 3 |
| INC (IY+o) | 23 | 7 | FD 34 oo | 3 |
| INC A | 4 | 1 | 3C | 1 |
| INC B | 4 | 1 | 04 | 1 |
| INC BC | 6 | 1 | 03 | 1 |
| INC C | 4 | 1 | 0C | 1 |
| INC D | 4 | 1 | 14 | 1 |
| INC DE | 6 | 1 | 13 | 1 |
| INC E | 4 | 1 | 1C | 1 |
| INC H | 4 | 1 | 24 | 1 |
| INC HL | 6 | 1 | 23 | 1 |
| INC IX | 10 | 2 | DD 23 | 2 |
| INC IY | 10 | 2 | FD 23 | 2 |
| INC IXp | 8 | 2 | DD 04+8*p | 2 |
| INC IYq | 8 | 2 | FD 04+8*q | 2 |
| INC L | 4 | 1 | 2C | 1 |
| INC SP | 6 | 1 | 33 | 1 |
| IND | 16 | 4 | ED AA | 2 |
| INDR | 21/16 | 4/3 | ED BA | 2 |
| INI | 16 | 4 | ED A2 | 2 |
| INIR | 21/16 | 4/3 | ED B2 | 2 |
| JP nn | 10 | 3 | C3 nn nn | 3 |
| JP (HL) | 4 | 1 | E9 | 1 |
| JP (IX) | 8 | 2 | DD E9 | 2 |
| JP (IY) | 8 | 2 | FD E9 | 2 |
| JP C,nn | 10 | 3 | DA nn nn | 3 |
| JP M,nn | 10 | 3 | FA nn nn | 3 |
| JP NC,nn | 10 | 3 | D2 nn nn | 3 |
| JP NZ,nn | 10 | 3 | C2 nn nn | 3 |
| JP P,nn | 10 | 3 | F2 nn nn | 3 |
| JP PE,nn | 10 | 3 | EA nn nn | 3 |
| JP PO,nn | 10 | 3 | E2 nn nn | 3 |
| JP Z,nn | 10 | 3 | CA nn nn | 3 |
| JR o | 12 | 3 | 18 oo | 2 |
| JR C,o | 12/7 | 3/2 | 38 oo | 2 |
| JR NC,o | 12/7 | 3/2 | 30 oo | 2 |
| JR NZ,o | 12/7 | 3/2 | 20 oo | 2 |
| JR Z,o | 12/7 | 3/2 | 28 oo | 2 |
| LD (BC),A | 7 | 2 | 02 | 1 |
| LD (DE),A | 7 | 2 | 12 | 1 |
| LD (HL),n | 10 | 3 | 36 nn | 2 |
| LD (HL),r | 7 | 2 | 70+r | 1 |
| LD (IX+o),n | 19 | 5 | DD 36 oo nn | 4 |
| LD (IX+o),r | 19 | 5 | DD 70+r oo | 3 |
| LD (IY+o),n | 19 | 5 | FD 36 oo nn | 4 |
| LD (IY+o),r | 19 | 5 | FD 70+r oo | 3 |
| LD (nn),A | 13 | 4 | 32 nn nn | 3 |
| LD (nn),BC | 20 | 6 | ED 43 nn nn | 4 |
| LD (nn),DE | 20 | 6 | ED 53 nn nn | 4 |
| LD (nn),HL | 16 | 5 | 22 nn nn | 3 |
| LD (nn),IX | 20 | 6 | DD 22 nn nn | 4 |
| LD (nn),IY | 20 | 6 | FD 22 nn nn | 4 |
| LD (nn),SP | 20 | 6 | ED 73 nn nn | 4 |
| LD A,(BC) | 7 | 2 | 0A | 1 |
| LD A,(DE) | 7 | 2 | 1A | 1 |
| LD A,(HL) | 7 | 2 | 7E | 1 |
| LD A,(IX+o) | 19 | 5 | DD 7E oo | 3 |
| LD A,(IY+o) | 19 | 1 | FD 7E oo | 3 |
| LD A,(nn) | 13 | 4 | 3A nn nn | 3 |
| LD A,n | 7 | 2 | 3E nn | 2 |
| LD A,r | 4 | 1 | 78+r | 1 |
| LD A,IXp | 8 | 2 | DD 78+p | 2 |
| LD A,IYq | 8 | 2 | FD 78+q | 2 |
| LD A,I | 9 | 2 | ED 57 | 2 |
| LD A,R | 9 | 2 | ED 5F | 2 |
| LD B,(HL) | 7 | 2 | 46 | 1 |
| LD B,(IX+o) | 19 | 5 | DD 46 oo | 3 |
| LD B,(IY+o) | 19 | 5 | FD 46 oo | 3 |
| LD B,n | 7 | 2 | 06 nn | 2 |
| LD B,r | 4 | 1 | 40+r | 1 |
| LD B,IXp | 8 | 2 | DD 40+p | 2 |
| LD B,IYq | 8 | 2 | FD 40+q | 2 |
| LD BC,(nn) | 20 | 6 | ED 4B nn nn | 4 |
| LD BC,nn | 10 | 3 | 01 nn nn | 3 |
| LD C,(HL) | 7 | 2 | 4E | 1 |
| LD C,(IX+o) | 19 | 5 | DD 4E oo | 3 |
| LD C,(IY+o) | 19 | 5 | FD 4E oo | 3 |
| LD C,n | 7 | 2 | 0E nn | 2 |
| LD C,r | 4 | 1 | 48+r | 1 |
| LD C,IXp | 8 | 2 | DD 48+p | 2 |
| LD C,IYq | 8 | 2 | FD 48+q | 2 |
| LD D,(HL) | 7 | 2 | 56 | 1 |
| LD D,(IX+o) | 19 | 5 | DD 56 oo | 3 |
| LD D,(IY+o) | 19 | 5 | FD 56 oo | 3 |
| LD D,n | 7 | 2 | 16 nn | 2 |
| LD D,r | 4 | 1 | 50+r | 1 |
| LD D,IXp | 8 | 2 | DD 50+p | 2 |
| LD D,IYq | 8 | 2 | FD 50+q | 2 |
| LD DE,(nn) | 20 | 6 | ED 5B nn nn | 4 |
| LD DE,nn | 10 | 3 | 11 nn nn | 3 |
| LD E,(HL) | 7 | 2 | 5E | 1 |
| LD E,(IX+o) | 19 | 5 | DD 5E oo | 3 |
| LD E,(IY+o) | 19 | 5 | FD 5E oo | 3 |
| LD E,n | 7 | 2 | 1E nn | 2 |
| LD E,r | 4 | 1 | 58+r | 1 |
| LD E,IXp | 8 | 2 | DD 58+p | 2 |
| LD E,IYq | 8 | 2 | FD 58+q | 2 |
| LD H,(HL) | 7 | 2 | 66 | 1 |
| LD H,(IX+o) | 19 | 5 | DD 66 oo | 3 |
| LD H,(IY+o) | 19 | 5 | FD 66 oo | 3 |
| LD H,n | 7 | 2 | 26 nn | 2 |
| LD H,r | 4 | 1 | 60+r | 1 |
| LD HL,(nn) | 16 | 5 | 2A nn nn | 3 |
| LD HL,nn | 10 | 3 | 21 nn nn | 3 |
| LD I,A | 9 | 2 | ED 47 | 2 |
| LD IX,(nn) | 20 | 6 | DD 2A nn nn | 4 |
| LD IX,nn | 14 | 4 | DD 21 nn nn | 4 |
| LD IXh,n | 11 | 3 | DD 26 nn | 2 |
| LD IXh,p | 8 | 2 | DD 60+p | 2 |
| LD IXl,n | 11 | 3 | DD 2E nn | 2 |
| LD IXl,p | 8 | 2 | DD 68+p | 2 |
| LD IY,(nn) | 20 | 6 | FD 2A nn nn | 4 |
| LD IY,nn | 14 | 4 | FD 21 nn nn | 4 |
| LD IYh,n | 11 | 3 | FD 26 nn | 2 |
| LD IYh,q | 8 | 2 | FD 60+q | 2 |
| LD IYl,n | 11 | 3 | FD 2E nn | 2 |
| LD IYl,q | 8 | 2 | FD 68+q | 2 |
| LD L,(HL) | 7 | 2 | 6E | 1 |
| LD L,(IX+o) | 19 | 5 | DD 6E oo | 3 |
| LD L,(IY+o) | 19 | 5 | FD 6E oo | 3 |
| LD L,n | 7 | 2 | 2E nn | 2 |
| LD L,r | 4 | 1 | 68+r | 1 |
| LD R,A | 9 | 2 | ED 4F | 2 |
| LD SP,(nn) | 20 | 6 | ED 7B nn nn | 4 |
| LD SP,HL | 6 | 1 | F9 | 1 |
| LD SP,IX | 10 | 2 | DD F9 | 2 |
| LD SP,IY | 10 | 2 | FD F9 | 2 |
| LD SP,nn | 10 | 3 | 31 nn nn | 3 |
| LDD | 16 | 4 | ED A8 | 2 |
| LDDR | 21/16 | 4 | ED B8 | 2 |
| LDI | 16 | 4 | ED A0 | 2 |
| LDIR | 21/16 | 4 | ED B0 | 2 |
| MULUB A,r | 14 | ED C1+8*r | 2 | |
| MULUW HL,BC | 36 | ED C3 | 2 | |
| MULUW HL,SP | 36 | ED F3 | 2 | |
| NEG | 8 | 2 | ED 44 | 2 |
| NOP | 4 | 1 | 00 | 1 |
| OR (HL) | 7 | 2 | B6 | 1 |
| OR (IX+o) | 19 | 5 | DD B6 oo | 3 |
| OR (IY+o) | 19 | 5 | FD B6 oo | 3 |
| OR n | 7 | 2 | F6 nn | 2 |
| OR r | 4 | 1 | B0+r | 1 |
| OR IXp | 8 | 2 | DD B0+p | 2 |
| OR IYq | 8 | 2 | FD B0+q | 2 |
| OTDR | 21/16 | 4/3 | ED BB | 2 |
| OTIR | 21/16 | 4/3 | ED B3 | 2 |
| OUT (C),A | 12 | 3 | ED 79 | 2 |
| OUT (C),B | 12 | 3 | ED 41 | 2 |
| OUT (C),C | 12 | 3 | ED 49 | 2 |
| OUT (C),D | 12 | 3 | ED 51 | 2 |
| OUT (C),E | 12 | 3 | ED 59 | 2 |
| OUT (C),H | 12 | 3 | ED 61 | 2 |
| OUT (C),L | 12 | 3 | ED 69 | 2 |
| OUT (n),A | 11 | 3 | D3 nn | 2 |
| OUTD | 16 | 4 | ED AB | 2 |
| OUTI | 16 | 4 | ED A3 | 2 |
| POP AF | 10 | 3 | F1 | 1 |
| POP BC | 10 | 3 | C1 | 1 |
| POP DE | 10 | 3 | D1 | 1 |
| POP HL | 10 | 3 | E1 | 1 |
| POP IX | 14 | 4 | DD E1 | 2 |
| POP IY | 14 | 4 | FD E1 | 2 |
| PUSH AF | 11 | 4 | F5 | 1 |
| PUSH BC | 11 | 4 | C5 | 1 |
| PUSH DE | 11 | 4 | D5 | 1 |
| PUSH HL | 11 | 4 | E5 | 1 |
| PUSH IX | 15 | 5 | DD E5 | 2 |
| PUSH IY | 15 | 5 | FD E5 | 2 |
| RES b,(HL) | 15 | 5 | CB 86+8*b | 2 |
| RES b,(IX+o) | 23 | 7 | DD CB oo 86+8*b | 4 |
| RES b,(IY+o) | 23 | 7 | FD CB oo 86+8*b | 4 |
| RES b,r | 8 | 2 | CB 80+8*b+r | 2 |
| RET | 10 | 3 | C9 | 1 |
| RET C | 11/5 | 3/1 | D8 | 1 |
| RET M | 11/5 | 3/1 | F8 | 1 |
| RET NC | 11/5 | 3/1 | D0 | 1 |
| RET NZ | 11/5 | 3/1 | C0 | 1 |
| RET P | 11/5 | 3/1 | F0 | 1 |
| RET PE | 11/5 | 3/1 | E8 | 1 |
| RET PO | 11/5 | 3/1 | E0 | 1 |
| RET Z | 11/5 | 3/1 | C8 | 1 |
| RETI | 14 | 5 | ED 4D | 2 |
| RETN | 14 | 5 | ED 45 | 2 |
| RL (HL) | 15 | 5 | CB 16 | 2 |
| RL (IX+o) | 23 | 7 | DD CB oo 16 | 4 |
| RL (IY+o) | 23 | 7 | FD CB oo 16 | 4 |
| RL r | 8 | 2 | CB 10+r | 2 |
| RLA | 4 | 1 | 17 | 1 |
| RLC (HL) | 15 | 5 | CB 06 | 2 |
| RLC (IX+o) | 23 | 7 | DD CB oo 06 | 4 |
| RLC (IY+o) | 23 | 7 | FD CB oo 06 | 4 |
| RLC r | 8 | 2 | CB 00+r | 2 |
| RLCA | 4 | 1 | 07 | 1 |
| RLD | 18 | 5 | ED 6F | 2 |
| RR (HL) | 15 | 5 | CB 1E | 2 |
| RR (IX+o) | 23 | 7 | DD CB oo 1E | 4 |
| RR (IY+o) | 23 | 7 | FD CB oo 1E | 4 |
| RR r | 8 | 2 | CB 18+r | 2 |
| RRA | 4 | 1 | 1F | 1 |
| RRC (HL) | 15 | 5 | CB 0E | 2 |
| RRC (IX+o) | 23 | 7 | DD CB oo 0E | 4 |
| RRC (IY+o) | 23 | 7 | FD CB oo 0E | 4 |
| RRC r | 8 | 2 | CB 08+r | 2 |
| RRCA | 4 | 1 | 0F | 1 |
| RRD | 18 | 5 | ED 67 | 2 |
| RST 0 | 11 | 4 | C7 | 1 |
| RST 8H | 11 | 4 | CF | 1 |
| RST 10H | 11 | 4 | D7 | 1 |
| RST 18H | 11 | 4 | DF | 1 |
| RST 20H | 11 | 4 | E7 | 1 |
| RST 28H | 11 | 4 | EF | 1 |
| RST 30H | 11 | 4 | F7 | 1 |
| RST 38H | 11 | 4 | FF | 1 |
| SBC A,(HL) | 7 | 2 | 9E | 1 |
| SBC A,(IX+o) | 19 | 5 | DD 9E oo | 3 |
| SBC A,(IY+o) | 19 | 5 | FD 9E oo | 3 |
| SBC A,n | 7 | 2 | DE nn | 2 |
| SBC A,r | 4 | 1 | 98+r | 1 |
| SBC A,IXp | 8 | 2 | DD 98+p | 2 |
| SBC A,IYq | 8 | 2 | FD 98+q | 2 |
| SBC HL,BC | 15 | 2 | ED 42 | 2 |
| SBC HL,DE | 15 | 2 | ED 52 | 2 |
| SBC HL,HL | 15 | 2 | ED 62 | 2 |
| SBC HL,SP | 15 | 2 | ED 72 | 2 |
| SCF | 4 | 1 | 37 | 1 |
| SET b,(HL) | 15 | 5 | CB C6+8*b | 2 |
| SET b,(IX+o) | 23 | 7 | DD CB oo C6+8*b | 4 |
| SET b,(IY+o) | 23 | 7 | FD CB oo C6+8*b | 4 |
| SET b,r | 8 | 2 | CB C0+8*b+r | 2 |
| SLA (HL) | 15 | 5 | CB 26 | 2 |
| SLA (IX+o) | 23 | 7 | DD CB oo 26 | 4 |
| SLA (IY+o) | 23 | 7 | FD CB oo 26 | 4 |
| SLA r | 8 | 2 | CB 20+r | 2 |
| SRA (HL) | 15 | 5 | CB 2E | 2 |
| SRA (IX+o) | 23 | 7 | DD CB oo 2E | 4 |
| SRA (IY+o) | 23 | 7 | FD CB oo 2E | 4 |
| SRA r | 8 | 2 | CB 28+r | 2 |
| SRL (HL) | 15 | 5 | CB 3E | 2 |
| SRL (IX+o) | 23 | 7 | DD CB oo 3E | 4 |
| SRL (IY+o) | 23 | 7 | FD CB oo 3E | 4 |
| SRL r | 8 | 2 | CB 38+r | 2 |
| SUB (HL) | 7 | 2 | 96 | 1 |
| SUB (IX+o) | 19 | 5 | DD 96 oo | 3 |
| SUB (IY+o) | 19 | 5 | FD 96 oo | 3 |
| SUB n | 7 | 2 | D6 nn | 2 |
| SUB r | 4 | 1 | 90+r | 1 |
| SUB IXp | 8 | 2 | DD 90+p | 2 |
| SUB IYq | 8 | 2 | FD 90+q | 2 |
| XOR (HL) | 7 | 2 | AE | 1 |
| XOR (IX+o) | 19 | 5 | DD AE oo | 3 |
| XOR (IY+o) | 19 | 5 | FD AE oo | 3 |
| XOR n | 7 | 2 | EE nn | 2 |
| XOR r | 4 | 1 | A8+r | 1 |
| XOR IXp | 8 | 2 | DD A8+p | 2 |
| XOR IYq | 8 | 2 | FD A8+q | 2 |
In this overview, the following variables were used:
- b
- 3-bit value
- n
- 8-bit value
- nn
- 16-bit value
- o
- 8-bit offset (2-complement)
- r
- Register. This can be A, B, C, D, E, H, L or (HL). Add the following value to the last byte of the opcode:
Register Register bits value A 7 B 0 C 1 D 2 E 3 H 4 L 5 (HL) 6 - p, IXp
- Denotes the high or low part of the IX register: IXh or IXl. Add the following value to the last byte of the opcode:
Register Register bits value A 7 B 0 C 1 D 2 E 3 IXh 4 IXl 5 - q, IYq
- Denotes the high or low part of the IY register: IYh or IYl. Add the following value to the last byte of the opcode:
Register Register bits value A 7 B 0 C 1 D 2 E 3 IYh 4 IYl 5
Grauw