Method and apparatus for interrupt processing in a computer syst

Details Method and apparatus for interrupt processing in a computer syst Method and apparatus for interrupt processing in a computer syst

1988-12-12

1992-06-02

Shaw, Greth D.

Boots, shoes, and leggings

3642411, 3642412, 3649403, G06F 1324, G06F 1337

Patent

active

051194961

ABSTRACT:
An interrupt processing method and an interrupt processing apparatus provides an end indicative information storing unit for storing an end indicative information of a daisy chain for at least one of a plurality peripheral units, the peripheral unit receiving the indicative information when the peripheral unit receives an acknowledge signal but does not output a request signal, and the peripheral unit outputs a specific chain end state signal to the central processing unit, so that the central processing unit is returned from a response waiting state. Therefore, when an error request signal is produced by noise, etc., delay at a central processing unit is reduced. Further, the daisy chain connection is cut at an optional portion and a request signal from an irrevelant peripheral unit is ignored, so that the efficiency of the processing is improved.

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European Search Report
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WO-A-8-502-474, (American Telephone & Telegraph Co.).
IEEE Micro, vol. 5, No. 1, Feb. 1985, pp. 53.66.

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