Core logic device of computer system

Details Core logic device of computer system Core logic device of computer system

2008-05-06

2008-05-06

Ray, Gopal C. (Department: 2111)

Electrical computers and digital data processing systems: input/

Interrupt processing

Handling vector

C710S260000

Reexamination Certificate

active

07370130

ABSTRACT:
A core logic device of a computer system includes a programmable interrupt controller (PIC), an input/output advanced programmable interrupt controller (I/O APIC) and a virtual wire unit. The PIC outputs a control signal to the virtual wire unit via an interrupt pin in response to an external interrupt signal asserted by a peripheral device before an operating system is loaded in the computer system. The virtual wire unit outputs an interrupt control packet to the CPU in response to the control signal wherein the interrupt vector contents carried by the interrupt control packet are ignored by the CPU. After the operating system is loaded in the computer system, the I/O APIC outputs another interrupt control packet to the CPU in response to the external interrupt signal.

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