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File No. 1620/1710-03
Form A26-5730-2
Systems Reference Library
IBM 1443 PRINTER for 1620/1710 Systems
This publication describes the IBM 1443 Printer as an on-line
output unit for the 1620 Data Processing Systems, :Models 1 and
2, and for the 1710 Control System.
This is a reprint of an earlier publication; it incorporates the follow-
ing Technical Newsletters:
Fonn No. Pages Dated
N26-0076 1,2,3,3.1,4,5, and 6 6/16/64
N26-0118 3 and 3.1 4/1/65
N26-0124 2 4/30/65
N26-0142 3.1 and 4 11/2/65
Copies of this and other IBM publications can be obtained through IBM Branch Offices.
Comments concerning the contents of this publication may be addressed to:
IBM, Product Publications Department, San Jose, Calif. 95114
ii
Contents
Page Page
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 1443 Program Indicators ........................... 3
Printing Operation ............................... . 1 IBM 1443 Printer Controls. . . . . . . . . . . . . . . . . . . . . . . .. 4
Print Control ................................... . 1 Control Tape .................................... 7
Pr.int Instructions ................................ . 2 Forms ........................................... 12
Tape-Controlled Carriage ......................... . 2
Space and Skip Instructions ........................ . 3 Index ............................................ 15
iii
Introduction
The IBM 1443 Printer is an on-line output unit for Lines Per Minute
Character
both models of the 1620 Data Processing System and Set 1443-1 1443-2
the 1710 Control System. Standard features include a
13 430 600
tape-controlled caniage for transporting continuous
paper forms, an interchangeable type bar, and buffer 39 190 300
storage.
52 150 240
The easy interchangeability of the type bar enables
the operator to select type-style and character-set for
As shown above, it is the smaller character sets that
specific applications.
provide the greatest speed. A smaller number of type
The printer buffer enables the computer to transfer characters allows more character set repetition on the
core storage data to the buffer, and then continue proc- type bar, and as a result, less type bar travel is neces-
essing during the relatively slow printing operation. sary to pass all the characters in front of every print
Printing speed is from 150 to 600 lines a minute, de- hammer. Less type bar travel, of course, enables great-
pending on the 1443 Model and the character-set of er printing speeds.
the type bar in use. A print line consists of 120 charac-
ters. An additional 24 characters are available as a
special feature for each line. Print Control
Data to be printed must first be edited and arranged
in core storage in exactly the format to be printed.
Printing Operation The appropriate 1620 output instruction can then be
The 1443 type bar can print the standard 1620 char- executed to transfer the data to the print buffer.
acter set, i.e., each of the 120 or 144 print positions The print buffer contains 197 positions even though
can print anyone of 48 different characters: 26 alpha- the 1443 prints only 120 or 144 positions. The Printer
betic, 10 numeric, and 12 special characters. Dump (PRD-35) instruction transfers a full buffer load
of data, 197 characters, including group mark (=