IBM 5150 Hardware Reference Manual page 289

8088 CONDITIONAL TRANSFER OPERATIONS
Instruction Condition
Interpretation
JE or JZ ZF = 1
"equal" or "zero"
JL or JNGE
(SF xor OF) = 1
"less" or "not greater or equal"
JLEorJNG
((SP xor OF) or
"less or equal" or "not greater"
ZF)
=
1
JB or JNAE CF
=
1
"below" or "not above or equal"
JBE or JNA
(CForZF)=l
"below or equal" or "not above"
JP or JPE
PF = 1 "parity" or "parity even"
JO
OF = 1 "overflow"
JS SF
=
1 "sign"
JNE or JNZ ZF = 0 "not equal" or "not zero"
JNLorJGE (SF xor OF)
=
0 "not less" or "greater or equal"
JNLE or JG ((SF xor OF) or "not less or equal" or "greater"
ZF)
=
0
JNB or JAE
CF
=
0
"not below" or "above or equal"
JNBE or JA (CF or ZF) = 0
"not below or equal" or "above"
JNP or JPO
PF
=
0
"not parity" or "parity odd"
JNO OF = 0
"not overflow"
JNS
Sf
=
0 "not sign"
*"
Above" and "below" refer to the relation between two unsigned
values, while "greater" and "less" refer to the relation between
two signed values.
INT
=
Interrupt
Type specified
11 1 0 0 1 1 0 1 type 1
Type 3
111001101
INTO = Interrupt on overflow
1110011101
IRET
=
Interrupt return
11 1 001 1 1 1
PROCESSOR CONTROL
CLC
=
Clear carry STC
=
Set carry
1 1 1 1 1 1 0 0
o
I
1 1 1 1 0 0
11
CMC
=
Complement carry
NOP = No operation
1
1 1
0 1 0
11
1 0 0 1
I
11
0 0 0
o
I
B-14