IBM System/360 System Programmer's Guide

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EXECUTE

CHANNEL

PROGRAM

(EXCP) MACRO-INSIRUCTION

This

chapter

contains

a

general

description

of

the

function

and

application

of

the

Execute

Channel

Program

(EXCP)

macro-instruction,

accompanied

by

descrip-

tions

of

specific

control

blocks

and

macro-

instructions

used

with

EXCP.

Factors

that

affect

the

operation

of

EXCP,

such

as

device

variations

and

program

modification,

are

also

discussed.

The

EXCP

macro~instruction

provides

you

with

a

device-dependent

means

of

performing

the

I/O

operations.

Before

reading

this

chapter,

you

should

be

familiar

with

system

functions

and

with

the

structure

of

control

blocks,

as

well

as

with

the

operational

characteristics

of

the

I/O

devices

required

by

your

channel

programs.

Operational

characteristics

of

specific

I/O

devices

are

contained

in

IBM

System

Reference

Library

publications

for

each

device.

Documentation

of

the

internal

logic

of

the

input/output

supervisor

can

be

obtained

through

your

IBM

Branch

Office.

PREREQUISITE PUBLICATIONS

The

IBM

System/360

Operating

System:

Data

Management

publication

(Form

C28-6537)

explains

the

standard

procedures

for

I/O

processing

under

the

operating

system.

The

IBM

System/360

Operating

System:

Assemtler

Language

publication

(Form

C28-6514)

contains

the

information

neces-

sary

to

code

programs

in

the

assembler

language.

The

IBM

System/360

Operating

System:

Control

Program

Services

publication

(Form

C28-6541)

describes

the

system

macro-

instructions

that

can

be

used

in

programs

coded

in

the

assembler

language.

The

IBM

System/360

Opezating

System:

System

Control

Block

publication

(Forro

C28-6628)

contains

format

and

field

de-

scriptions

of

the

system

control

clocks

referred

to

in

this

chapter.

74

Table of Contents

Other manuals for IBM System/360

User Guide118 pages

Operating Guide48 pages

Field Engineering Manual131 pages

Questions and Answers:

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IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English

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