COMPUTING

048 TELETYPE ASR-33 MODEL 3320 6WA (c1970)
Teletype
80*60*100
Grey metal & plastic paper tape punch, 7-bit CCITT No. 5 U.S. ASCII keyboard. Automatic Sending and Receiving unit, combines a keyboard, page printer, reperforator (paper tape punch) and tape transmitter. Can transmit directly from keyboard or paper tape. Receives either by page printing or punching paper tape. Tape may be punched from keyboard while off-line for later transmission. Uses ASCII codes.

Used as a terminal with the first PDP-11 in Queensland from 1973 and with phase ionosode until 1984.

References:

Martin, James, "Telecommunications and the Computer", 2nd ed, Prentice- Hall, 1976, Ch3.

T.E.

049 IBM CARD PUNCH MODEL 29 (c1970)
International Business Machines
90*75*84
Keyboard and card bed assembly mounted on desk. Card bed assembly has (covered) removable program drum with 'starwheel' cogged wheels; punch station with punching mechanism; read station with cogged wheels. Keyboard has various switches for card bed mechanism control. Punched cards have 12 rows and 80 columns. Card punch creates new punched cards from data entered from keyboard or replicates other punched cards. Each card holds 80 characters. Operation can be controlled by program card, with 1 or 2 punch control programs(s) on it. The program card is read by cogged wheels which rotate in accordance with the punched pattern on the program card. Cards are punched at the punch station by small arm punches. Cards to be duplicated are also read by cogged wheels. Card punches such as this were mainly used to store programs written in FORTRAN.
References:

IBM Card Punch User's Manual.

G.P.

50 9820A PROGRAMMABLE CALCULATOR (c 1971)

Hewlett-Packard Company, USA, No. 1144A00875

45*54*14

The desk-top calculator has a metal casing with a plastic front. Its features include LED display, 5K RAM, 95-key keyboard, magnetic card storage and printer. The program memory can store up to 500 program steps, and the data memory can store 51 data numbers. The calculator has three slots designed for plug-in special purpose ROMs called function blocks. These allow the user to upgrade to higher mathematics capabilities, including statistical computations, or add on optional peripherals. Function blocks MATHEMATICS 11221A and PERIPHERAL CONTROL I11220A are installed. Programs and data can be recorded on magnetic cards. The cards are six inches long, and up to 500 program steps can be stored on each side. The printer uses paper rolls 3 inches in width. The similar 9810A model was priced at $US2,975.