System for testing a data processing unit

Details System for testing a data processing unit System for testing a data processing unit

1974-05-21

1976-10-26

Atkinson, Charles E.

Registers

Transfer mechanism

Traveling pawl

G06F 1104

Patent

active

039885798

ABSTRACT:
The disclosure described improved apparatus for testing a data processing system including first and second functional members. First and second microprograms for testing the first and second functional members, respectively, are held in a read only store. If an error is detected in the first functional member while the data processing system is processing data, a circuit transmits the starting address of the first microprogram to an address register for the store, so that the first microprogram tests the defective first functional member. As the first functional member is tested, the symptoms needed to diagnose the defect are collected. If the first microprogram is completed without all of the symptoms required for diagnosis being collected, another circuit transmits the first address to the address register so that the first microprogram is executed again. The first microprogram continues to be executed until all of the symptoms needed for diagnosis are collected. The same procedure is used for the testing of the second functional member.

REFERENCES:
patent: 3519808 (1970-07-01), Lawder
patent: 3631229 (1971-12-01), Bens et al.
patent: 3813531 (1974-05-01), King et al.
patent: 3838260 (1974-09-01), Nelson

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