Editor and Assembler for 57A Magnetic Tape System

8-180

Donald C. Uber, Lawrence Radiation Laboratory, Livermore,

California

The symbolic Editor and MACRO-8 Assembler have been

modified to replace paper tape with IBM-compatible magnetic

tape for more rapid and convenient program development.

The system requires an 8K PDP-8 and a 57A Tape Control

with one transport.

The Editor reads and writes ASCII text in a file on magnetic

tape. Text is stored in "pages" which may be individually

accessed by Teletype commands. All the original operations

are retained, including paper tape I/O.

MACRO-8 assembles the text file, completing all three passes

before halting. Binary output is on high or low speed paper

tape. The symbol table and Pass 3 listing may be on Teletype

or written in a second tape file for listing on a line printer.

A third program moves pages of text from one area of tape

to another whenever re-editing and re-assembly are

necessary.

Minimum Hardware:
PDP-8, 8K memory, ASR-33,

57A Magnetic Tape Control with

one transport.

Other Programs Needed:
Symbolic Editor (DEC-08-ESAB)

High-Speed MACRO-8 (DEC-8-8-

S)

Storage Requirement:
Fields 0 and 1; locations 0-7577

Source Language:
MACRO-8

Restrictions:
The 57A needs modification for

Extended Memory operations.

Catalog: November 1969

Minimum Hardware:	PDP-8, 8K memory, ASR-33, 57A Magnetic Tape Control with one transport.
Other Programs Needed:	Symbolic Editor (DEC-08-ESAB) High-Speed MACRO-8 (DEC-8-8- S)
Storage Requirement:	Fields 0 and 1; locations 0-7577
Source Language:	MACRO-8
Restrictions:	The 57A needs modification for Extended Memory operations.
Catalog:	November 1969