Common diagnostic bus for computer systems to enable testing con

Details Common diagnostic bus for computer systems to enable testing con Common diagnostic bus for computer systems to enable testing con

1975-04-14

1977-05-10

Nusbaum, Mark E.

Communications: electrical

Digital comparator systems

235153R, G06F 1100

Patent

active

040231429

ABSTRACT:
A common reliability and serviceability (RAS) bus is connected to each functional combination of LSI apparatus, i.e., storage control, central processing unit (CPU), input/output (I/O) attachments and devices, and system control adapter constituting a computer system. The common RAS bus includes a unique address line to facilitate discrete addressing of each functional unit from the system control adapter. Logic is included in each I/O type of functional unit which is responsive to the address signal and a test mode signal for degating or blocking data normally transferring between the functional units.
Other logic provides control signals for causing the addressed functional unit to go thru one clock cycle, one shift cycle, one machine cycle or one instruction cycle. This enables the addressed unit to go thru an operation after a test pattern has been loaded into the functional unit while the system continues to operate concurrently, if the addressed unit is other than the CPU. The status of the addressed unit is then checked by the system control adapter.

REFERENCES:
patent: 3641505 (1972-02-01), Artz et al.
patent: 3668644 (1972-06-01), Looschen et al.
patent: 3768074 (1973-10-01), Sharp et al.
patent: 3786430 (1974-01-01), Hajdu et al.
patent: 3825901 (1974-07-01), Golnek et al.
patent: 3828321 (1974-08-01), Wilber et al.
patent: 3876987 (1975-04-01), Dalton et al.

Affiliated with

Also associated with

Rating

Common diagnostic bus for computer systems to enable testing con does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Common diagnostic bus for computer systems to enable testing con, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Common diagnostic bus for computer systems to enable testing con will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1986623