IBM 5100 User Manual

Input/Output Control Blocks
The 10CB (input/output control block) is the interface be-
tween
the APl or BASIC interpreter and the I/O supervisor.
When the APl or BASIC interpreter executes an APl or
BASIC statement that requires an I/O function, the APl or
~BAS'IC' interpreter places the appropriate I/O code in the
approp.r:ia1;e 10CB and branches to the I/O supervisor. The
I/O supervisor executes the I/O function specified by
the
,liOcodeand places a return code inthe IOCB to inform
the APl or BASIC interpreter how the 110 operation is
,completed. This return code is checked by the APl or
BASIC interpreter.
The following 10CB formats are the same for both languages
unless specified otherwise:
COMMAND 10CB (BASIC ONLY)
Hex
Displacement
o
Length
Form
Binary
Binary
Description
Defines
the device assigned to the 10CB:
Hex
00 Display screen
Hex
04 Keyboard
Hex
01 ROS
Hex 05 Printer
Hex
OE
- Tape
Hex
08 - Expansion feature
1
Specifies subdevice:
Hex
00 Not used
Hex
80
Built-in tape unit
Hex
40 Auxiliary tape unit
Hex
08 - Serial 110 command device
Hex
04 - Serial 110 output device
Hex
02 - Serial 110 input device
Hex
20 - Serial 110 BASIC load
Hex
40 - Serial 110 BASIC save
1 Hardware and communications device address is hex OS. Serial 1/0 device address is hex OA.
6-16
/
\.

IBM 5100 Specifications

General

Release Year	1975
RAM	16 KB - 64 KB
Storage	204 KB tape drive
Display	5-inch CRT
Operating System	APL/BASIC
Processor	IBM PALM (1.9 MHz)

Summary

Preface

CE Safety Practices

General Considerations

Safety precautions for working with IBM equipment, general guidelines.

Rescue Breathing for Adults

Step-by-step instructions for administering rescue breathing to adults.

Using the IBM 5100 Portable Computer Maintenance Library

5100 Maintenance Library Overview

Description of the 5100 maintenance library components including MAPs, MIMs, logics, catalogs, and tools.

MAPs

MAP Organization

Flowchart and explanation of how MAPs are structured and used for troubleshooting.

Using the MAPs

Instructions on how to read and follow MAPs, including sequences and probing.

MAP Example

Illustration and explanation of a sample MAP process, including entry/exit points and references.

Maintenance Information Manual

Maintenance

Details on location drawings and procedures for repairing or replacing FRUs.

Diagnostic Aids

Information on diagnostic programs, halt codes, and error conditions.

Theory

Descriptions of functional units and features, including a system overview.

Circuits

Information on card plug charts, signal cable charts, and logic diagrams.

Language Support

Reference material for determining causes of programming problems.

Appendix

Installation procedures and additional maintenance information.

Abbreviations and Glossary

Definitions of terms and abbreviations used in the manual and MAPs.

Index

A detailed listing of all topics within the maintenance information manual.