Daisy chaining of device interrupts in a cathode ray tube device

Details Daisy chaining of device interrupts in a cathode ray tube device Daisy chaining of device interrupts in a cathode ray tube device

1978-12-26

1980-09-30

Boudreau, Leo H.

Boots, shoes, and leggings

G06F 946

Patent

active

042259428

ABSTRACT:
A microprocessor controlled cathode ray tube display system has a plurality of peripheral devices all connected in common to a system bus. Apparatus in each peripheral device activates a single interrupt signal. A single acknowledge response signal to all the devices enables the interrupting device to place its address signals on the system bus thereby initiating a firmware routine for making the interrupting device operative with the system.

REFERENCES:
patent: 3800287 (1974-03-01), Albright
patent: 3813651 (1974-05-01), Yamada
patent: 3815099 (1974-06-01), Cohen et al.
patent: 3832692 (1974-08-01), Henzel et al.
patent: 3833888 (1974-09-01), Stafford et al.
patent: 3866181 (1975-02-01), Gayman et al.
patent: 3911409 (1975-10-01), Kowal et al.
patent: 3993981 (1976-11-01), Cassarino, Jr. et al.
patent: 4106104 (1978-08-01), Nitta et al.

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