Processor Control - IBM AT 5170 Technical Reference

Processor Control
CLC
=
Clear Carry
11111000
~
CMC
=
Complement Carry
11110101
STC
=
Set Carry
11111001
CLD
=
Clear Direction
11111100
STD
=
Set Direction
11111101
~
CLI Clear Interrupt
11111010
STI
=
Set Interrupt
11111011
HLT
=
Halt
11110100
WAIT
=
Wait
10011011
LOCK
=
Bus Lock Prefix
~
11110000
Instruction Set 6-17