IBM 5100 User Manual

HOW TO FIND THE I/O BUFFER IN APL
In the following example, data was received from an I/O
device using the serial I/O Adapter feature. The I/O oper-
ation was
not completed because an end of buffer character
was
not received from the I/O device. Therefore, the data
received from
the I/O device is still in the I/O data buffer.
( This data can be displayed and interpreted as follows:
(
('
(
1. Using the DCP1 display function, display the address
of the start of the user workspace, which is located
at hex 0180 in read/write storage:
D OlElO
LOC@
01BO
ncp:l.
Address of the start of the user workspace
~~--"--""'''''
0000 OE80 8274 8342
DCPl
I~C(jO
0000
0000
(lOOO
Oleo 4003 5682 0000 0000 0000 0000 8l8E 8142
2. Add hex 0184 to the address of the start of the user
workspace:
Hex OE80 (start of user workspace)
Hex 0184
Hex 1004 (address of shared variable table entries)
3. Display the shared variable table entries
at hex address
1004.
P :1.004·
LOC@
l004·
DePl
Displacement address of I/O buffer area
r~--"''''''--",
(l00(l 2:1.C4 0000 2:1.84
DCPl
0000
0000
0000 nooo
1014 00000000 0000 0000 0000 0000 0000 0000
4. Now, to find the I/O buffer area, add the I/O buffer
area displacement address
to OE80 (address of the
start of the user workspace):
Hex 21C4
(110 buffer area displacement address)
Hex OE80 (address
of start of user workspace)
Hex
3044 (address of the I/O buffer area)
Language Support 6-13

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.