Sharp MZ-80B Owner's Manual page 104

Mnemonic
DAA
CPL
NEG
CCF
SCF
NOP
HALT
DI
El
111' 1
0
IM 1
111' 1 2
Symbolic
Flags OP-Code
Operation
c
z
P/ V
s
N
H 76 543 210
Converts ace con-
t t
p
t
•
t
00 100 111
tent
int o
packed
BCD following add
or subtract with
packed BCD ope·
rands
A~A
•
•
• •
1 1 00 101 111
A ~A + 1
t
t v t
1
t
11 101 101
01 000 100
- -
CY ~ CY
t
• • •
0
X
00 111 111
CY~ 1 1
• • •
0 0 00 110 111
No operation
• • • • • •
00 000 000
PC ~PC + 1
CPU halt ed
•
• • •
• •
01 110 110
IFF ~ O
• • • • • •
11 110 011
IFF ~1
• • • • • •
11 111 011
Sst interrupt
•
• • •
• •
11 101 101
mode 0 01 000 110
Set interrupt
• • •
• • •
11 101 101
mode I
01 010 110
Set int e rrupt
• • • •
.
.
•
11 101 101
mode 2 01 011 110
Notes: IFF indicates the interrupt enable flip-flop
CY indicates the carry flip-flop.
Ko.
~0. 1\o.
of of M ofT
Comments
Bytes Cycles States
1 1
4
Decimal adjust accumulator
1
1 4
Compl ement accumu lator
( one's complement ) N
2
2
8
Negate ace. ( two's
compl ement )
1 1 4
Complement carry flag
1
1 4
Set carry flag
1
1
4
1
1 4
1
1
4
1
1
4
2 2 8
2
2
8
2
2
8
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.
GENERAL PURPOSE ARITHMETIC AND CPU CONTROL GROUPS
TABLE 4 .3-5
95