IBM 5100 User Manual

Example 2: In the floating-point number 40 CO 00 00
00 00 00 00,
bit 0 of byte 0 is off, so the number is
positive. Bits 1-7 equal hex 40 indicating no movement
of the hexadecimal point. After dropping trailing zeros,
the hexadecimal number is .C (hex C = 12). Using the
chart in example 1, multiply
12 by 1/16, which equals
0.75. The decimal value of the floating-point number
40
CO 00 00 00 00 00 00 is 0.75.
Example 3: In the floating-point number BF 50 00 00
00 00 00 00,
bit 0 of byte 0 is on so the number is
negative. Bits 1-7 equal 3F indicating that the hexadecimal
point
be moved 1 half byte to the left. After dropping
the trailing
zeros and moving the hexadecimal point, the
hex number .50000000000000
becomes -0.05. Using
the chart in example 1,
multiply:
Ox 1/16
5 x 1/256
Result
o
0.01953125
-0.01953125
So the decimal value of the floating-point number BF
50 00 00 00 00 00 00 is -0.01953125.
By using this procedure, any floating-point number
can
be converted to its decimal value.
6-12
( ~\
/
i
/

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.