ZiLOG Z80 Handbook page 284

Table C-10. Call and Return Group
Flags
OP-Code
No. No.
No.
Symbolic
P of of M
of T
Mnemonic Operation
C Z V S N H 76 543 210
Bytes Cycles States
Comments
CALL no (SP-1)-PCH • •
001 101 3
5 17
(SP-2)-PC L
n
PC--nn
n
CALL cc, on If condition
I 1 cc 100
3
3 10 If cc is false
cc is false
n
continue,
otherwise
n
3 5 17 If cc is true
same as
CALL nn
RET PCL-(SP)
I1 001 001 l 3
10
PCH-( SP+1)
RET cc
If condition
11 cc 000
1
1
5 If cc is false
cc is false
wntrwise
otherwise
1
3 11 If cc is true
same as cc Condition
RET
000
NZ non zero
001
Z zero
RETI
Return from
•
101 101 2
4
14
010
011
NC non carry
C carr
interrupt
01 001 l01
y
parity odd
REIN Return from
11 101 101 2 4 14
] 01
PE parity even
non maskable
interrupt
01 000 101
110
111
P sign positive
M sign negative
RST p
(SP-l)--PCH
11 t 111 1 3 11
(SP-2)-PCL
PCH -0
PCL--P
P
000 OOH
001 08H
010 10H
011 18H
100
20H
101 28H
110 30H
111 38H
Flag Notation : a = flag not affected , 0 = flag reset , I = flag set , X = flag is unknown
t = flag is affected according to the result of the operation.
293