Channel hardware diagnostic apparatus and method

Boots – shoes – and leggings

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371 201, 3642419, 364267, G06F 1100, G06F 300

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active

049640364

ABSTRACT:
Provision is made for conducting an I/O channel diagnostic test by using a first I/O channel in a test mode to provide a sequence of test signals to a second I/O channel. The second I/O channel responds to the test sequence by producing a series of data transfer protocol signals which are conducted to the first channel. In the first channel, the series of data transfer protocol signals are used to check operation of the second channel.

REFERENCES:
patent: 4031375 (1977-06-01), Jaskulke et al.
patent: 4155117 (1979-05-01), Mitchell, Jr. et al.
patent: 4386400 (1983-05-01), Cope et al.
patent: 4719626 (1988-01-01), Ogasawara
patent: 4730313 (1988-03-01), Stephenson et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 4, Sep. 1982, "Channel Check System" by L. C. Eggebrecht and J. W. Freeman, pp. 2221-2222.
IBM publication GA22-6974-09, File No. S360/S370-19, IBM System/360 and System/370/I/O Interface Channel to Control Unit Original Equipment Manufacturers' Information.

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