Zero and Add Packed

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(ZAP) An IBM 360/370 assembly language instruction used when performing packed decimal arithmatic to initialise an accumulator or to set the byte at a given address to a given value.

Use of the ZAP instruction is rumoured to be involved in the SuperZap utility program.

Last updated: 2021-03-21

Nearby terms:

ZEROzeroZero and Add Packedzero assignmentzero-contentZero Insertion Force

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