Interrupt driven expanded option select interface for...

Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring

Reexamination Certificate

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Details

C710S008000, C710S010000, C710S011000, C710S014000, C455S066100

Reexamination Certificate

active

07127533

ABSTRACT:
A peripheral component (104) is attached to a portable electronic device (102), and indicates an option class of the peripheral component by use of an option select circuit. The option select circuit causes an interrupt to be generated in the portable electronic device, which then determines the option class by changing the logic levels of various option select lines. If an inversion of the logic state of one of the option select lines is detected, then the portable electronic device knows an option select circuit is present, and determines the option class of the peripheral component accordingly.

REFERENCES:
patent: 4608562 (1986-08-01), Minor et al.
patent: 5301360 (1994-04-01), Goldberg
patent: 6460094 (2002-10-01), Hanson et al.
patent: 2002/0065964 (2002-05-01), Lemke et al.
The Microsoft Computer Dictionary, 2002, Microsoft Press, 5th edition, pp. 209,210,368, and 369.

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