IBM System/360 System Programmer's Guide

EXECUTE DIRECT ACCESS PROGRA~ (XDAP) MACRO-INSTRUCTION
This chapter explains what the Execute
Direct-Access Program (XDAP) macro-
instruction does and how yeu can use it.
The control block generated when XDAP is
issued and the rracro-instructions uSEd with
XDAP are also discussed.
The XDAP macro-instruction provides you
with a roeans of reading, verifying, or
updating blocks on direct-access volumes
without using an access method and without
writing your own channel frogram. SincE
most of the specifications for XDAP are
similar to those for the Execute Channel
program (EXCP) macro-instructicn, it is
recommended that you be falliiliar with the
"EXCP Macro-Instruction" chapter of this
putlication, as well as with the
information contained in the required fut-
lication.
PREREQUISITE PUBLICATION
The IBM Systero/360 Operating System:
Data Managewent putlication (Form C28-6537)
explains the standard procedures fer I/O
processing under the operating system.
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IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English