Priority vectored interrupt using direct memory access

Details Priority vectored interrupt using direct memory access Priority vectored interrupt using direct memory access

1976-10-04

1978-05-16

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 918, G06F 1300

Patent

active

040902382

ABSTRACT:
Circuit for receiving service request signals from peripheral devices in a computer system and providing an address to the computer to effect a program transfer to an appropriate service subroutine. An interrupt request signal is generated to cause the computer to jump to a subroutine. A DMA (direct memory access) request is used to store the address at which the proper subroutine is stored. The proper subroutine depends on the highest priority device supplying a service request signal and on the status of that device. Provision is also made for storing a double-length address.

REFERENCES:
patent: 3665415 (1972-03-01), Beard et al.
patent: 3766526 (1973-10-01), Buchanan
patent: 3800287 (1974-03-01), Albright
patent: 3833888 (1974-09-01), Stafford et al.
patent: 3905025 (1975-09-01), Davis et al.
patent: 3943495 (1976-03-01), Garlic
patent: 3944985 (1976-03-01), Brandstaetter et al.

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