Notation And Binary Encoding - ZiLOG Z8 Series User Manual

Table 36. Condition Codes
Binary Hex
0000 0
1000 8
0111 7
1111 F
0110 6
1110 E
1101 D
0101 5
0100 4
1100 C
0110 6
1110 E
1001 9
0001 1
1010 A
0010 2
1111 F
0111 7
1011 B
0011 3

Notation and Binary Encoding

In the detailed instruction descriptions that make up the rest of this chapter, operands and
status flags are represented by a notational shorthand. Operands, condition codes, address
modes, and their notations are as follows (see
UM001604-0108
Mnemonic Definition
F Always False
(blank) Always True
C Carry
NC No Carry
Z Zero
NZ Non-Zero
PL Plus
Ml Minus
OV Overflow
NOV No Overflow
EQ Equal
NE Not Equal
GE Greater Than or Equal
LT Less Than
GT Greater Than
LE Less Than or Equal
UGE Unsigned Greater Than or Equal
ULT Unsigned Less Than
UGT Unsigned Greater Than
ULE Unsigned Less Than or Equal
Flag Settings
—
—
C = 1
C = 0
Z = 1
Z = 0
S = 0
S = 1
V = 1
V = 0
Z = 1
Z = 0
(S XOR V) = 0
(S XOR V) = 1
(Z OR (S XOR V)) = 0
(Z OR (S XOR V)) = 1
C = 0
C = 1
(C = 0 AND Z = 0) = 1
(C OR Z) = 1
Table 37 on page 148).
®
Z8 CPU
User Manual
147
Instruction Set