Method and apparatus for indicating a time-out by generating a t

Details Method and apparatus for indicating a time-out by generating a t Method and apparatus for indicating a time-out by generating a t

1996-04-25

1997-07-22

Barry, Esq., Lance Leonard

Excavating

371 201, 371 62, 395878, 395555, G06F 1100

Patent

active

056511132

ABSTRACT:
A channel time-out apparatus in a data processing system having a channel processor for controlling the allocation of a plurality of input/output channels. The channel time-out apparatus comprises a clock for generating time indications, an address generator for generating an address for each input/output channel of the plurality of input/output channels, a time-out generator for generating a time-out indicator for an input/output channel whenever that input/output channel processes an instruction, storage for storing the last time-out indicator generated by the time-out means for each input/output channel and a comparator for comparing the last time-out indicator stored in the storage for the input/output channel whose address is presently being generated by the address generator with a time indicator presently being generated by the clock for determining when a time-out event has occurred without requiring intervention by the processor.

REFERENCES:
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patent: 4090239 (1978-05-01), Twibell et al.
patent: 4099255 (1978-07-01), Stanley et al.
patent: 4220990 (1980-09-01), Alles
patent: 4327409 (1982-04-01), Maruoka et al.
patent: 5404356 (1995-04-01), Abe

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