Personal computer bus and video adapter for high performance...

Details Personal computer bus and video adapter for high performance... Personal computer bus and video adapter for high performance...

G - Physics

06

F

G06F 13/00 (2006.01) G06F 13/12 (2006.01)

Patent

CA 2044835

KI9-90-003 PERSONAL COMPUTER BUS AND VIDEO ADAPTER FOR HIGH PERFORMANCE PARALLEL INTERFACE ABSTRACT OF THE DISCLOSURE Adapters attach the bus or video display of a personal computer or workstation to a high performance parallel interface (HIPPI) channel of a host computer. The HIPPI channel operate. at a burst rate of 100 megabytes (MB) per second. The adapter includes an electrical circuit interface to provide compatible signal levels between the HIPPI channel and the bus of the personal computer or workstation. The adapter attaching the bus includes a first-in, first-out (FIFO) buffer that receives data words from the HIPPI channel. Control logic monitors the status of the FIFO buffer and interlocks the operation of the personal computer or workstation bus with the HIPPI channel so that proper data transfer is performed by the FIFO buffer. The adapter attaching the video display includes a pair of buffers operating in a ping-pong fashion to allow data to be written while data is being read. The buffers can be addressed by the personal computer or workstation as if they were internal memory. To allow a plurality of workstations to be connected to a single HIPPI channel, the HIPPI adapter is modified to include a pass through function allowing the devices to be connected in a "Daisy chain".

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