Data processing apparatus having diagnosis function

Details Data processing apparatus having diagnosis function Data processing apparatus having diagnosis function

1979-12-13

1982-06-15

Zache, Raulfe B.

Boots, shoes, and leggings

371 29, G06F 1132

Patent

active

043354254

ABSTRACT:
A data processing apparatus incorporating a function referred to as the scan-out diagnosis function for reading out and checking sequentially internal states of the apparatus. In addition to the address designating means for the scan-out diagnosis function, an address register is provided which is validated in place of the address designating means only when the latter is inoperative, to thereby designate a particular flip-flop. An observing means is provided for observing continuously the state of the particular flip-flop as read out. Thus, the state of the flip-flop designated by the address register can be continually visually observed independently of the address designating means for the scan-out diagnosis function.

REFERENCES:
patent: 3751649 (1973-08-01), Hart, Jr.
patent: 4099668 (1978-07-01), Feilchenfeld et al.
patent: 4125763 (1978-11-01), Drabing et al.

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