Boots – shoes – and leggings
Patent
1981-04-16
1985-01-15
Zache, Raulfe B.
Boots, shoes, and leggings
455607, G06F 1300
Patent
active
044941854
ABSTRACT:
A data processing system employing broadcast packet switching and having a plurality of subsystems and a system bus for linking the subsystems. The subsystems are grouped within stations that are each enclosed by a computer cabinet. The system bus includes a star coupler, first and second external transmission lines connecting each station to the star coupler, and first and second internal transmission lines within each station that are coupled to the first and second external transmission lines. The subsystems within each station are each coupled to the first and second internal transmission lines by a system bus interface. The system bus interface monitors the system bus for an idle condition, and passes a message from its subsystem to the system bus only when it detects an idle condition on the system bus. Each message on the system bus includes a postamble that is garbled by any system bus interface that detects an error in any message on the system bus. Each subsystem has a local memory that includes a mailbox for storing header information of messages that are to be copied by that subsystem. DMA circuitry in each system bus interface manages the operation of the mailbox in its subsystem. In alternate embodiments, the star coupler may be a magnetic star coupler or an electrical star coupler, and the system bus may be comprised of two channels, each channel including a star coupler and pairs of transmission lines connecting each station to the star coupler.
REFERENCES:
patent: 3995258 (1976-11-01), Barlow
patent: 4034346 (1977-07-01), Hostein
patent: 4063220 (1977-12-01), Metcalfe
patent: 4124889 (1978-11-01), Kaufman
patent: 4186380 (1980-01-01), Edwin
patent: 4210780 (1980-07-01), Hopkins
patent: 4227260 (1980-10-01), Vojvodich
patent: 4234968 (1980-11-01), Singh
patent: 4234969 (1980-11-01), Singh
patent: 4254884 (1981-01-01), Magura et al.
patent: 4257124 (1981-03-01), Porter et al.
patent: 4281380 (1981-07-01), DeMesa
patent: 4294508 (1981-10-01), Husbands
patent: 4333178 (1982-06-01), Farrington
patent: 4362359 (1982-12-01), Dammann et al.
Metcalf and Boggs, Ethernet: Distributed Packet Searching for Local Computer Network, 7 Comm. of the ACM 395 (1976).
Rawson and Metcalf, Fibernet: Multimode Optical Fibers for Local Computer Network, 26 IEEE Trans. on Comm. 93 (1978).
Gunderson Robert O.
Kocol James C.
Schuck David B.
Cavender J. T.
Dugas Edward
Eng David Y.
Jewett Stephen F.
NCR Corporation
LandOfFree
Data processing system employing broadcast packet switching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data processing system employing broadcast packet switching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data processing system employing broadcast packet switching will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1484619