Sharp MZ-80B - Page 101

94
Symbolic
Fl ags
OP-Code
1\o.
i\o .
:'o/o.
Mn emonic
of oD I
ofT
Co mme nts
Operation
c
z P/ Y
s
N H 76 543 210
Byte s
Cy cles
States
ADD
A,r
A ~ A + r
t t
v
t
0
t
10 [QQQ]
r 1 1 4 r
Reg.
ADD
A, n
A ~ A + n
t t
v
t
0
t
11 [@Q) 110 2
2 7
000 B
~
n
......
001
c
ADD
A,(HL)
A ~ A + (HL)
t
I
v
t
0
t
10 100oi 1 10 1 2 7
010
D
ADD
A,(IX + d)
A •- A + (IX + d)
t
t
v
t
0
t
11 011 101
3 5
19
011
E
10 [QQQ] 110
100
H
~
d
......
101
L
ADD A, (IY + d)
A ~ A + (I Y + d)
I
t
v
t
0
t
Ill
A
11 111 101 3 5 19
10 IQQQ] 110
~
d
......
ADC A ,s A ~ A + s + CY
t t
v
t
0
t
[@!]
s is any of r, n, ( HL), (IX +
SUB s
A~A-s
t t
v
t
1
t
lliQJ
d), (IY + d) as s hown for
SBC A ,s
A ~ A - s-CY
t
t
v
t
I
t
[QTI]
ADD instruction
AND s
A ~A /\ s
0
t
p
t
0
1
[QQ]
The indi cated bits replace
OR s
A ~ Avs
0
t
p
t
0
0
[ITQ]
the [QQQJ in the ADD set
above.
XOR s
A ~ AVs
0
t
p
t
0 0
m
CP s
A- s
t t
v
t
1
t
[ill
INC r
r ~ r + 1
•
t
v
t
0
t
00
r [ @] 1 1
4
INC
(HL)
(HL)<-{HL) + l
•
t
v
t
0
t
00 110 [QQ] 1
3
11
INC
(IX + d)
(IX + d) ~
•
t
v
t
0
t
11 011 101 3 6 23
(IX + d) + l 00 110 [QQ]
~
d
......
IN C (IY + d)
(IY + d)~
•
t
v
t
0
t
11 111 101
3 6 23
(IY+d) + l 00 110 [QQ]
~
d
......
DEC m
m ~ m - 1
•
t
v
t
1
t
I!Q!)
m is any of r, (HL), (IX + d),
(IY + d) as shown for INC.
Sa me format and states as
INC.
Replace
ITQQ] with l!QI] in
OP-code.
Notes: The V sy mbol in the P/V flag column indicates that the P/V flag contains the overflow of the result of the
operation Similarly the
P symbol indicates parity. V = 1 means overflow, V = 0 means not overflow, P = 1
means parity
of the result is even, P = 0 means panty of the result is odd.
Flag Notation:
• = flag not affected, 0 = flag reset, 1 = flag set, X= flag is un known,
t = flag is affected according to the result of the operation.
8- BIT ARITHMETIC AND LOGICAL GROUP
TABLE 4.3-4