Patent ID: 6192425
Filing Date: 2001-02-20
Classification: G06F

Abstract:
An interrupt line sharing circuit for use in a computer system, said computer system includes a computer, a plurality of peripheral devices and one common interrupt line provided in common to said plurality of peripheral devices, said computer being configured to perform a predetermined input/output access when said computer has completed an interrupt processing, and wherein each peripheral device includes a respective interrupt line sharing circuit, each line sharing circuit comprising:an input/output monitor which monitors whether or not said predetermined input/output access has been performed;an interrupt line monitor connected to said input/output monitor, said interrupt line monitor monitors said common interrupt line and determines than an interrupt processing is started if an interrupt request is sent onto said common interrupt line from any one of said plurality of peripheral devices, said interrupt line monitor further determines that said interrupt processing has been completed when said input/output monitor detects said predetermined input/output access; andan interrupt line controller, coupled to said interrupt line monitor, said interrupt line controller sends said interrupt request generated in said plurality of peripheral devices, to said common interrupt line after said completion of said interrupt processing.