Communications: electrical – Digital comparator systems
Patent
1974-09-10
1976-02-17
Springborn, Harvey E.
Communications: electrical
Digital comparator systems
G06F 900
Patent
active
039394557
ABSTRACT:
A program-controlled microprocessor of the microprogramming type adapted to be incorporated in a system including external circuit devices. The microprocessor is provided with an interface arrangement for connecting the microprocessor to the external circuit device wherein the interface arrangement includes data buses which are an extension of at least a portion of the data buses of the arithmetic section in the microprocessor. The interface arrangement also includes a control bus arrangement adapted to provide outputs relating to the contents in a read-only-memory register for microprogramming and an address bus arrangement which is adapted, when the external circuit device receives a microprocessing instruction through the control bus arrangement, to provide the external circuit device connected thereto with means for designating an address of the next micro-programming instruction to be executed.
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patent: 3681761 (1972-08-01), Schrenemann et al.
patent: 3704448 (1972-11-01), Osborne
patent: 3725868 (1973-03-01), Malmer, Jr. et al.
Hitachi , Ltd.
Springborn Harvey E.
Woods Paul R.
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