Data processing unit having scan-in and scan-out means

Details Data processing unit having scan-in and scan-out means Data processing unit having scan-in and scan-out means

1977-10-21

1979-09-11

Thomas, James D.

Boots, shoes, and leggings

235302, G06F 300, G06F 1106

Patent

active

041677803

ABSTRACT:
Disclosed herein is a data processing unit including a scan-in register, a scan-out register and conventional facility and control circuit divisions. The scan-in register supplies at any desired time external predetermined control data to the facility circuit division independently from control data produced by the control circuit division. The scan-out register transmits at any desired time the control data produced by the control circuit division. Then the control data is extracted from the data processing unit. Both the scan-in register and the scan-out register are used for carrying out a diagnostic check of the facility and control circuit divisions.

REFERENCES:
patent: 3061192 (1962-10-01), Terzian
patent: 3462742 (1969-08-01), Miiller
patent: 3702988 (1972-11-01), Haney
patent: 3740722 (1973-06-01), Greenberg
patent: 3793631 (1974-02-01), Silverstein
patent: 3833888 (1974-09-01), Stafford
patent: 3938098 (1976-02-01), Garlic
patent: 3984813 (1976-10-01), Chung
patent: 4086658 (1978-04-01), Finlay
"Intel MCS-4 Micro Computer Set," Intel Corp., Jan. 1972.

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