Programming instructions

Foreword

This manual is for programmers and users of the Programmed Data

Processor-4, a high speed, stored program, digital computer manufac-

tured by the Digital Equipment Corporation. Chapters 2 and 3 contain the

detailed information necessary to make use of the machine. Chapter 1

summarizes the machine’s electrical and logical design. Chapter 4 pre-

sents information helpful in making the electrical connections to input-

output devices. Appendices provide detailed data which may be helpful

in specific programming assignments. Although program examples are

given in this document, no attempt has been made to teach programming

techniques. However, Appendix 4 explains the meaning and use of special

characters used in the programming examples.