Microprocessor system with source address selection

Details Microprocessor system with source address selection Microprocessor system with source address selection

1979-06-27

1981-09-15

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 1300

Patent

active

042901065

ABSTRACT:
A microprocessor system having control lines and bus connections to an application dependent logic module having control logic, external registers and external memory for data transfers to/from a specific type of peripheral device. Addressing means are provided in said microprocessor whereby a program counter is used to address program memory and a memory reference register is used to provide addresses for access to external memory, and said memory reference register includes a low order bit field which selects whether the program counter or the memory reference register will be the address source for memory accesses.

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patent: 4084236 (1978-04-01), Chelberg et al.
patent: 4106092 (1978-08-01), Millers
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patent: 4162520 (1979-07-01), Cook et al.
patent: 4174352 (1979-11-01), Cook et al.
patent: 4189769 (1980-02-01), Cook et al.

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