HARRY R KELLER
Engineers in Phoenix, AZ
License number
Pennsylvania PE011849E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Phoenix, AZ 85009
Pennsylvania
Pennsylvania
Professional information
Rapid Bus Priority Resolution
US Patent:
3983540, Sep 28, 1976
Filed:
Sep 8, 1975
Appl. No.:
5/611439
Inventors:
Harry Keller - Phoenix AZ
Edward H. Forrester - Phoenix AZ
Edward H. Forrester - Phoenix AZ
Assignee:
Honeywell Inc. - Minneapolis MN
International Classification:
G06F 300
US Classification:
3401725
Abstract:
In a computer system wherein a number of peripheral devices contend with each other for access to a communication bus, a priority selection system is provided. The priority selection system includes priority address code setting means as a part of each of the peripheral devices. A contention bus is provided to which all of the peripheral devices are connected in parallel. Logic means are provided as a functional part of each of the peripheral devices. A logic means are responsive to the setting of the priority address codes to resolve the priority selection among the several contenders. With the logic means and the address code means being a part of the peripheral devices, the selection is independent of card cage slot position or of slot gaps. The system is also independent of the length of the communication bus.