IBM AT 5170 Technical Reference page 384

LOOPNZ/LOOPNE
=
Loop while Not Zero/Not Equal
I
11100000
I
disp
JCXZ
=
Jump on CX Zero
11100011
I
disp
ENTER
=
Enter Procedure
11001000
I
data-low data-high
LEAVE
=
Leave Procedure
11001001
INT
=
Interrupt
Type Specified
11001101 Type
Type 3
11001100
INTO
=
Interrupt on Overflow
11001110
IRET
=
Interrupt Return
11001111
BOUND
=
Detect Value Out of Range
01100010
mod reg rim
6-16 Instruction Set