Diagnostic testing of the data path in a microprogrammed data pr

Details Diagnostic testing of the data path in a microprogrammed data pr Diagnostic testing of the data path in a microprogrammed data pr

1981-04-03

1983-10-18

Atkinson, Charles E.

Excavating

371 22, 364200, G06F 1100

Patent

active

044109849

ABSTRACT:
A microprogrammed controlled commercial instruction processor coupled to a common bus executes a diagnostic microprogram to check the data path of the common bus interface registers and their associated internal registers. Decoded bits of a predetermined microword of the diagnostic microprogram generate a signal which transfers a predetermined data word containing a plurality of bytes stored in a first of the internal registers sequentially through the interface registers to a second of the internal registers during one microword cycle. Apparatus generates bad parity for selected bytes. Subsequent microwords compare the contents of the first and second internal registers and verify the detection of the "bad" parity.

REFERENCES:
patent: 3465132 (1969-09-01), Crockett et al.
patent: 3491337 (1970-01-01), Guzak, Jr. et al.
patent: 3518413 (1970-06-01), Holtey
patent: 3566093 (1971-02-01), Joyce et al.
patent: 3579199 (1971-05-01), Anderson et al.
patent: 3784978 (1974-01-01), Zola
patent: 3831148 (1974-08-01), Greenwalt et al.
patent: 3846751 (1974-11-01), Prieto
patent: 4019033 (1977-04-01), Parmet
patent: 4038537 (1977-07-01), Cassarino
patent: 4048481 (1977-09-01), Bailey, Jr. et al.
patent: 4159534 (1979-06-01), Getson, Jr. et al.
patent: 4195770 (1980-04-01), Benton et al.
Schaaf, "Automatically Checked Photoelectric Apparatus," IBM Tech. Disclosure Bulletin, vol. 18, No. 12, 5/76.

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