| Mnemonic |
Symbolic
Operation |
Flags
S Z H P/V N C |
Opcode
76 543 210 |
Hex |
Bytes |
M
Cycles |
Clock
Cycles |
Comments |
| BIT b, r |
__
Z ¬ rb |
X ↕ 1 X 0 • |
11 001 011
01 b r |
CB |
2 |
2 |
8 |
r Reg
000 B
001 C
010 D
011 E
100 H
101 L
111 A
b Bit
000 0
001 1
010 2
011 3
100 4
101 5
110 6
111 7
|
| BIT b, (HL) |
____
Z ¬ (HL)b |
X ↕ 1 X 0 • |
11 001 011
01 b 110 |
CB |
2 |
3 |
12 |
| BIT b, (IX + d) |
______
Z ¬ (IX+ d)b |
X ↕ 1 X 0 • |
11 011 101
11 001 011
¬ d
®
01 b 110 |
DD
CB |
4 |
5 |
20 |
| BIT b, (IY + d) |
______
Z ¬ (IY+ d)b |
X ↕ 1 X 0 • |
11 111 101
11 001 011
¬ d
®
01 b 110 |
FD
CB |
4 |
5 |
20 |
| SET b, r |
rb ¬
1 |
• • • • • • |
11 001 011
11
b r
|
CB |
2 |
2 |
8 |
| SET b, (HL) |
(HL)b ¬ 1 |
• • • • • • |
11 001 011
11
b 110 |
CB |
2 |
4 |
15 |
| SET b, (IX + d) |
(IX+ d)b ¬
1 |
• • • • • • |
11 011 101
11 001 011
¬
d ®
11 b 110 |
DD
CB |
4 |
6 |
23 |
| SET b, (IY + d) |
(IY+ d)b ¬
1 |
• • • • • • |
11 111 101
11 001 011
¬
d ®
11 b 110 |
FD
CB |
4 |
6 |
23 |
| RES b, r |
rb ¬
0 |
• • • • • • |
11 001 011
10
b r
|
CB |
2 |
2 |
8 |
| RES b, (HL) |
(HL)b ¬ 0 |
• • • • • • |
11 001 011
10
b 110 |
CB |
2 |
4 |
15 |
| RES b, (IX + d) |
(IX+ d)b ¬
0 |
• • • • • • |
11 011 101
11 001 011
¬
d ®
10 b 110 |
DD
CB |
4 |
6 |
23 |
| RES b, (IY + d) |
(IY+ d)b ¬
0 |
• • • • • • |
11 111 101
11 001 011
¬
d ®
10 b 110 |
FD
CB |
4 |
6 |
23 |
| Notes: |
The notation mb indicates bit b (0 to 7) of location
m.
BIT instructions are performed by an bitwise AND. |
| Flag Notation: |
• = flag is not affected, 0 = flag is reset, 1 = flag is
set, X = flag is “don’t care”,
↕ = flag is set according to the result of the operation. |
|
