Method and apparatus for testing a digital computer

Details Method and apparatus for testing a digital computer Method and apparatus for testing a digital computer

1982-09-29

1985-01-08

Smith, Jerry

Excavating

324 73R, G06F 1100

Patent

active

044930780

ABSTRACT:
A system for on-line, concurrent self-testing of a computer is disclosed which is capable of checking the "test kernel" of the computer; that is, the portion of the computer that must be fault-free in order for the computer to test itself with a self-test program. The test kernel includes the computer CPU, the ROM which contains the self-test program, and the intraboard data, address and control buses, bus drivers and multiplexers. The system operates in a transparent fashion to test the computer during its normal operation. The system includes a linear feedback shift register connected to control signal outputs of the CPU and thus determines whether the CPU produces the proper control signals during fetch and/or execution of each program instruction.

REFERENCES:
patent: 4108359 (1978-08-01), Proto
patent: 4142243 (1979-02-01), Bishop et al.
patent: 4369511 (1983-01-01), Kimura et al.
patent: 4441182 (1984-04-01), Best et al.

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