IBM System/360 Field Engineering Manual

"'
0
Operation
Zero and Add
Mnemonic
ZAP
Op Code Format
Operands
FS SS Dl(Ll,Bl),
D2(L2,B2)
Description
InterruptiE~
_g~~
Opr 1 cleared and opr 2 placed in opr 1 Prat
O Result= O
(Low-order opr 's may coincide) Adr 1 Result < 0
(Opr 2 must be in packed format) Data
2 Result > O
(Opr 1 field must be large enough for all Dec Oflo
3
Overflow
opr 2 significant digits)

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English