Z86E6116PSC Datasheet, PDF (57/69 Pages) Zilog, Inc. – Z86E61/Z86E63 CMOS Z8 16K/32K EPROM Microcontroller

Z86E61/E63
CMOS Z8 16K/32K EPROM Microcontroller
53
Flags. Control register (R252) contains the following six flags:
Symbol
C
Z
S
V
D
H
Meaning
Carry flag
Zero flag
Sign flag
Overflow flag
Decimal-adjust flag
Half-carry flag
Affected flags are indicated by:
Symbol
0
1
*
-
x
Meaning
Clear to zero
Set to one
Set to clear according to
operation
Unaffected
Undefined
CONDITION CODES
Table 31. Condition Codes
Value
1000
0111
1111
0110
1110
1101
0101
0100
1100
0110
1110
1001
Mnemonic Meaning
Always True
C
Carry
NC
No Carry
Z
Zero
NZ
Not Zero
PL
Plus
MI
Minus
OV
Overflow
NOV
No Overflow
EQ
Equal
NE
Not Equal
GE
Greater Than or Equal
Flags Set
C=1
C=0
Z=1
Z=0
S=0
S=1
V=1
V=0
Z=1
Z=0
(S XOR V) = 0
PS014401-1001