IP , ; (CS).
IP .
Flags (PSW) , . (. .3).
Flags | OF | DF | IF | TF | SF | ZF | AF | PF | CF | ||||||||||
.3
:
- ( ), ;
- ( ), .
.
AF (Auxiliary Carry flag) , BCD-, 1 ( ). BCD (Binary Coded Decimal) - .
CF (Carry flag) , , , 16 .
OF (Overflow flag) , . 1, , .
PF (Parity flag) , , 1, .
SF (Sign flag) , 1 .
ZF (Zero flag) .
.
DF (Direction flag) , . DF=1 , DF=0 .
DF | |
STD | |
CLD |
IF (Interrupt-Enable flag) , .
IF | ||
STI | ||
CLI |
TF (Trap flag) , () . TF=1 , . TF , , .