Sharp MZ-80B Owner's Manual page 102

Mnemonic
CPIR
CPO
CPDR
Symbolic
Flags OP-Code
No.
No.
of of M
Operation
c z
P/V
s
N H 76 543 210
Bytes
Cycles
I
0 CD
A-(HL)
•
t t
t
1
t
11 101 101 2 5
HL ~ HL + l
10 110 001 2
4
BC~BC - 1
Repeat until
A = (HL) or
BC = O
0 CD
A - (HL)
•
t
t
t
1
t
II 101 101
2 4
HL ~ HL - 1
10 101 001
BC ~BC - 1
0 CD
A - (HL)
•
t t t
1
t
II 101 101 2 5
HL ~ HL - 1
10 I II 001
2 4
BC~BC-1
Repeat until
A = (HL) or
BC = O
Notes: ; . } .J P
IV
flag is 0 if the result of BC-1
=
0, otherwise P
IV
=
1
0
Z flag is 1 if A= (HL), otherwise Z = 0.
No.
ofT
Comments
States
21 If BCctO and A ct (HL)
16
If BC = O or A = (HL)
16
21
If BC ct O and A ct (HL)
16 If
BC = O or A = (HL)
Flag Notation: • = flag not affected, 0 = flag reset, 1 = flag set, X= flag is unknown,
t
=
flag is affected according to the result of the operation.
EXCHANGE GROUP AND BLOCK TRANSFER AND SEARCH GROUP
TABLE 4.3-3
93
I