Desk top electronic computer with a removably mounted ROM

Details Desk top electronic computer with a removably mounted ROM Desk top electronic computer with a removably mounted ROM

1976-01-07

1978-05-23

Thomas, James D.

Boots, shoes, and leggings

G06F 1502, G06F 1300

Patent

active

040914461

ABSTRACT:
An electronic computer is provided with a numerical keyboard, a microprogrammed CPU, as well as RAMs and ROMs, some of them of pluggable type. A pluggable ROM stores a plurality of programs and comprises a portion formed of an associated plurality of registers each one storing a jump instruction and the associated programs. The numerical addresses of said registers are represented by a series of numerals which can be entered by the keyboard. Programs can be entered from the numerical keyboard into a RAM memory, in form of a sequence of numerical codes, each code corresponding to a subroutine prerecorded in a ROM. Each program so "learned" by the computer can be repeatedly executed by depressing a fixed code on the keyboard.

REFERENCES:
patent: 3355714 (1967-11-01), Culler
patent: 3469244 (1969-09-01), Perotto
patent: 3495222 (1970-02-01), Perotto
patent: 3533076 (1970-10-01), Perkins
patent: 3573746 (1971-04-01), Robinson
patent: 3588841 (1971-06-01), Ragen
patent: 3593313 (1971-07-01), Tomaszewski
patent: 3594734 (1971-07-01), Wang
patent: 3610902 (1971-10-01), Rahenkamp
patent: 3623012 (1971-11-01), Lowry
patent: 3636523 (1972-01-01), De Sandre
patent: 3691531 (1972-09-01), Saltini
patent: 3760171 (1973-09-01), Wang
patent: 3839630 (1974-10-01), Olander, Jr.
patent: 3859635 (1975-01-01), Watson
patent: 3971925 (1976-07-01), Wenninger
patent: 4012725 (1977-03-01), Spangler

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