ZiLOG Z8

Instruction Set
Condition Codes
Binary
Mnemonic Meaning
Flags Settings
0000 F Always false
"-
1000 (blank) Always true
0111
C
Carry C
1111
NC No carry
C 0
0110
Z Zero
Z 1
1110
NZ Not 0
Z 0
1101
PL Plus
S 0
0101
MI Minus
S
0100
OV Overflow
V
1100 NOV
No overflow
V = 0
0110
EQ
Equal
Z = 1
1110
NE Not equal
Z = 0
1001 GE
Greater than
or
(S XOR V)
0
equal
0001
LT Less than (S XOR V)
1
1010
GT
Greater Than (Z OR (S XOR V))=O
0010 LE
Less than or equal (Z OR (S XOR V))=1
1111 UGE
Unsigned greater than
C
0
or equal
0111 ULT
Unsigned
less than C
1011 UGT
Unsigned
greater than (C=O AND Z=O)
0011
ULE
Unsigned less than or
(C OR Z) = 1
equal
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