Biprogrammable electronic accounting machine

Details Biprogrammable electronic accounting machine Biprogrammable electronic accounting machine

1975-09-02

1977-03-29

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

G06F 918, G06F 300

Patent

active

040152456

ABSTRACT:
A biprogrammable computer is provided with an operator actuable selector switch. Each position of the selector switch of the computer assigns the keyboard, the console and the display to a selected one of the two programs in progress, so that the data entered by the keyboard is automatically transferred to the memory zone allocated to the program selected at the same time the display displays messages of the selected program. If the program not selected by the selector switch must alert the operator to some abnormalities, it activates a lamp and an associated buzzer. The operator after the end of the keyboard operation, actuates the selector switch and removes the cause of the abnormality. Registers are provided for storing the point of interruption of a program being processed, as well as information for determining if the data being entered by the keyboard relates to the program selected.

REFERENCES:
patent: 3373408 (1968-03-01), Ling
patent: 3406379 (1968-10-01), Palevsky et al.
patent: 3465298 (1969-09-01), La Duke et al.
patent: 3533076 (1970-10-01), Perkins et al.
patent: 3566358 (1971-02-01), Hasbrouck
patent: 3631406 (1971-12-01), Kurner
patent: 3769621 (1973-10-01), Osborne
patent: 3787673 (1974-01-01), Watson et al.
patent: 3810119 (1974-05-01), Zieve et al.
patent: 3858182 (1974-12-01), Delagi et al.
patent: 3905023 (1975-09-01), Perpiglia

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