![]() ![]() ![]() ![]() ![]() |
![]() ![]() ![]() ![]() ![]() |
![]() ![]() |
![]() |
( 460 of 478 ) |
United States Patent | 4,030,072 |
Bjornsson | June 14, 1977 |
A data processing system includes a control processor in communication with the various devices comprising the data processing system. Communication between the control processor and the data processing system devices occurs on a separate maintenance and diagnostic bus. The control processor initiates diagnostics stored within several of the data processing system devices. The self-diagnosing devices provide an indication to the control processor of successful completion of the diagnostic stored therein. The device being diagnosed and the control processor operate asynchronously of each other and utilize a register bit to indicate successful completion of the diagnostic test.
Inventors: | Bjornsson; Eyjolf Steuart (Manhattan Beach, CA) |
Assignee: |
Xerox Corporation
(Stamford,
CT)
|
Appl. No.: | 05/534,045 |
Filed: | December 18, 1974 |
Current U.S. Class: | 714/31 ; 714/32; 714/E11.174 |
Current International Class: | G06F 11/273 (20060101); G06F 11/267 (20060101); G06F 011/04 () |
Field of Search: | 340/172.5 445/1 |
3421150 | January 1969 | Quosig et al. |
3623011 | June 1969 | Brynard, Jr. et al. |
3643227 | February 1972 | Smith et al. |
3648252 | March 1972 | Thron et al. |
3763474 | October 1973 | Freman et al. |
3771131 | November 1973 | Ling |
3806878 | April 1974 | Edstrom |
3825901 | June 1974 | Golnek, Sr. |
![]() ![]() |
![]() ![]() ![]() ![]() ![]() |