IBM 5100 User Manual

Clock Ring
A clock ring is a free-running binary trigger ring consisting of
a number of polarity hold latches connected in series. The
output of one latch is the input to the next latch.
Clock Ring
REG
---1+1
Input +1 r1.Ilftru1.n.fl
Clock 1
Clock2 Clock 1 ~
Clock3 Clock2~
'---~
Clock3~
Parity Generator (PG)
This block generates a parity
(P) bit to keep the bit count
odd.
Read only storage and read/write storage - The symbol
for
the functional block is MREG. An MREG block with
buffered output is labeled MREGB.
Address lines - Address lines are identified by line
function symbol
A. The active bits in these lines select
the positions to be accessed. The number in parentheses
above the input group indicates the number
of lines that
must be active to get an active output. Activating the
o line selects addresses 0 through 127. Activating the 128
line selects addresses 128 through 255.
R/W (read/write control) line - The R/W (read/write
control line causes a read operation
to be performed
when the line
is at the indicated polarity, and a write
operation when
the line is at the opposite polarity.
Output buffer reset line (RB) - The output buffer reset
line, when it
is at the indicated polarity, resets the output
buffer.
Address ----(0-71
Low Order Select __ -I
High Order Select-- ....
Device Select -----I
Read or Write - __ --I
Output Gate --_--I
Reset Output Buffer
Data
In ____ (0-7)
5-12
MREGB
Line Function Symbols
(0-1) _Data Out
BUNDLING OF SIGNAL LINES
Bundling groups signal lines together that represent buses,
and
in some cases, similar functions, or similar sources
(block output) and sinks (block input).
Each line (strand)
is identified both at the point it enters
the bundle and
at the point it leaves the bundle. A single
line
that crosses the bundle is not identified, as shown in
the following illustration:
Strands
Enter a
Bundle
o
2
3
4
-----11------ Line Crossing a Bundle
Note: Logic lines always enter a bus from the left and
exit a bus on the right. The active level
of each line is
shown at its source logic block or by its line name. All
lines of a particular bundle might not have the same
active level.
/'
\,
\
/

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.