Processor I/O and interrupt filters allowing a co-processor to r

Details Processor I/O and interrupt filters allowing a co-processor to r Processor I/O and interrupt filters allowing a co-processor to r

1985-02-28

1987-09-22

Williams, Jr., Archie E.

Boots, shoes, and leggings

G06F 1516

Patent

active

046959459

ABSTRACT:
A co-processor is connectable to a main system data bus to run software unknown to the main processor. The main processor can concurrently run other software and maintains priority over shared I/O facilities by providing trapping logic incorporated in a random access memory and dynamically loadable by the master processor which contains data related to the current useability by the co-processor of a shared I/O device. Additional logic is associated with the co-processor to manage interrupts between the co-processor and the system bus.

REFERENCES:
patent: 4495569 (1985-01-01), Kagawa
patent: 4591975 (1986-05-01), Wade et al.

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