Cycle counter for timeout microdiagnostics

Details Cycle counter for timeout microdiagnostics Cycle counter for timeout microdiagnostics

1988-04-01

1989-12-26

Fleming, Michael R.

Excavating

364900, G06F 1104

Patent

active

048902853

ABSTRACT:
A method and apparatus for reducing the console interaction time in the performing of microdiagnostic tests on a central processing unit. A microdiagnostic code RAM operates the microdiagnostic code in the central processing unit. The microdiagnostic code RAM performs tests on the CPU. The microdiagnostic also loads a cycle counter with a value from the microdiagnostic code. At the beginning of a test, the cycle counter is initialized and begins counting. If the cycle counter reaches the previously loaded value before completion of the test, a machine-check trap occurs allowing the microdiagnostic code RAM to gain control of the test regardless of any error conditions that are present.

REFERENCES:
patent: 4538273 (1985-08-01), Lasser
patent: 4611271 (1986-09-01), Hattori
patent: 4696002 (1987-09-01), Schleupen
patent: 4752930 (1988-06-01), Kitamura
patent: 4803682 (1989-02-01), Hara

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