Boots – shoes – and leggings
Patent
1984-08-27
1989-09-26
Zache, Raulfe B.
Boots, shoes, and leggings
3642222, 364238, 3642423, G06F 1300
Patent
active
048705667
ABSTRACT:
A communications concentrator and message multiplexer featuring direct access from the communications adapters to main memory via direct memory access means which eliminates the usual scanner or polling facility in a concentrator or multiplexer is described. A control microprocessor manages the allocation of memory, the conversion of message protocols and the servicing of interrupts to a plurality of port interface adapter microprocessors. The interface adapter microprocessors directly set up and control the DMA operation instead of having the DMA operation controlled by the control processor. One of the port adapters serves as a service adapter over a dedicated interface allowing a remote disgnostician access to internal registers in the control processor system, access to a dedicated read only storage for servicing, and logical interface to the main control processor for the purpose of entering instructions and directing functional operations to test each component of the system.
REFERENCES:
patent: 4075691 (1978-02-01), Davis et al.
patent: 4100601 (1978-07-01), Kaufman et al.
patent: 4106092 (1978-08-01), Millers, II
patent: 4174536 (1979-11-01), Misunas et al.
patent: 4328543 (1982-05-01), Brickman et al.
patent: 4471427 (1984-09-01), Harris
patent: 4571675 (1986-02-01), Stambaugh et al.
Cooper Ronald J.
Marsico Mario A.
Matlack, Jr. Richard C.
Pescatore John C.
Smith, Jr. Robert L.
Duffield Edward H.
International Business Machines Corp.
Zache Raulfe B.
LandOfFree
Scannerless message concentrator and communications multiplexer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scannerless message concentrator and communications multiplexer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scannerless message concentrator and communications multiplexer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-191825