Sharp MZ-80B - Page 100

N ln emonic
CP IR
CPO
CPDR
Symbolic
Flags
OP-Code
No.
No.
No.
of
of M
ofT
Comments
Operation
c z P/V s N H 76 543 210
Bytes
Cycles States
I
@
CD
I I
I
I
A-(HL)
•
I
i
I
1
i
11 101 101
2
5
21 If BC * O and A* (HL)
HL•- HL+ 1
10 110 001
2 4 16
If BC = O or A=(HL)
BC•- BC - 1
Repeat until
A=(HL) or
BC = O
@
CD
A-(HL )
•
I
I
I
1
I
11 101 101 2
4
16
HL~HL-1
10 101 001
BC ~ BC - 1
@
CD
A- (HL)
•
I
I
I
1
I
11 101 101
2 5 21 If BC * O and A* (HL)
HL ~ HL - 1
10 111 001 2
4 16
If BC = O or A = (HL)
BC~BC-1
Repeat until
A=(HL) or
BC=O
Notes: !J P /V flag is 0 if the result of BC-1 = 0, otherwise P /V = 1
® Z flag is 1 if A= (HL), otherwise Z = 0.
Flag Notation: • = flag not affected, 0 = flag reset, 1 = flag set, X= flag is unknown,
i = flag is affected according to the result of the operation.
EXCHANGE GROUP AND BLOCK TRANSFER AND SEARCH GROUP
TABLE 4.3-3
93
I