ZiLOG Z80 Handbook page 285

Table C-11. Input and Output Group
Flags
Op-Code
No. No.
No.
Symbolic
/
of of M
of T
Mnemonic Operation C Z V S N H 76 543 210
Bytes
Cycles States Comments
IN A, (n) A -- (n) I I Oil 011 2 3 10
n to AO - A7
n -- Acc to A8-A15
INr,(C) r-(C)
I P 1
0 t
II 101 101 2 3
II
Cto AO -A7
ifr= 110 only OI r 000
Bto A8^ A15
the flags will
be affected
INI (HL) - (C)
• I
X X I X I1 101 101 2 4
15
C to A0 - A7
B-B-I 10 100 010
Bto A8-A13
HL -- HL+I
INIR (HL) - (C) I
X X
I X I1 101 101
2
5 20 C to A - A
B -- B - I 10 110 010
(IfBx0)
0 7
Bto A8-A15
HL - HL+I
2 4
15
Repeat until
(If B = 0)
B=0
IND (HL) - (C)
1
• I
X X I X 11 101 101 2 4 I5 CtoA0-A7
B - B - 1
10 101 010
BtoA6 A15
HL--HL-1
INDR
(HL) - (C) I X X I X I 1 101 101
2 5
20 C to A0 - A7
B - B - 1 10 111 010
(IfB*0)
Bto A8-A15
HL-HL-1
.2
4 15
Repeat until
( If B = 0)
B=0
OUT (n), A
(n) -A
I I 010 Oil 2 3 1 1
A All
Arc to A8 _ A15
OUT(C),r (C) - r 101 101
II
2 3
12
CtoA0-A7
.
01 r 001
Bto A8-A15
OUTI (C) - (HL) • I X X I X 11 101 101 2 4
15 C t. All - A7
B - B - I 10 100 Oil Bto A8-A15
HL - HL+I
OTIR (C) - (HL) I X X I X I1 101 101 2 5 20 C to A0 - A7
B - B - 1 10 110011
( lfBx0 )
Btu A8-A15
HL - HL+I
2
4
IS
Repeat until
(If B = 0)
B = 0
0
OUTD (C) - (HL)
• I
X X I X II 101 101 2 .4 IS
C to AO-A7
- • B-B-I 10 1 0 1 ()It
Bto AB A15
HL-HL- I
OTDR
(C) - (HL) • I X X I X I I 101 101 2 5
20 C lo A
- A
B - B - 1
10 111 011
(lfBS0)
0 7
BtoA8-A15
HL-HL-1
2
4 IS
Repeat until
(If B = 0)
8 = 0
Notes : (1 If the result of B - 1 is zero the Z flag is set, otherwise it is reset
Flag Notation : = flag not affected, 0 = flag reset , I = flag set, X = flag is unknown,
flag is affected according to the result of the operation.
294