IBM 5150 - 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
oI
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
oI
B-14