Programmable calculator including key-log printing means

Details Programmable calculator including key-log printing means Programmable calculator including key-log printing means

1977-11-10

1980-05-13

Nusbaum, Mark E.

Boots, shoes, and leggings

364710, G06F 312, G06F 302

Patent

active

042031524

ABSTRACT:
The modular read-write and read-only memory, central processing, input-output control keyboard input and output printer units of the calculator described herein provide an adaptable programmable calculator that may be operated manually by the user from the keyboard input unit or automatically by a program stored in memory. Programs may be loaded directly into memory from the keyboard and either data or programs may be separately transferred bi-directionally between the memory unit and an external magnetic card. Programs stored in the memory unit may be edited and key-coded logs, program lists, labels, and messages may be printed by the output printer unit by specifying one of several modes of the calculator. In one of the modes, the printer will print a log comprising a listing of a key code for each key actuated, of nearly all programmable operations performed from the keyboard.

REFERENCES:
patent: 3593313 (1971-07-01), Tomaszewski et al.
patent: 3623012 (1971-11-01), Lowry et al.
patent: 3744031 (1973-07-01), Avery et al.
patent: 3760171 (1973-09-01), Wang et al.
Programmer's Guide to the IBM System/360, Bradley, 1969, pp. 246-255, 294-297.

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