Communication multiplexer variable priority scheme

Details Communication multiplexer variable priority scheme Communication multiplexer variable priority scheme

G - Physics

06

F

354/234

G06F 13/00 (2006.01) G06F 13/22 (2006.01) G08C 15/12 (2006.01)

Patent

CA 1169158

ABSTRACT OF THE DISCLOSURE A communication multiplexer stores the receive and transmit channel numbers of input/output devices coupled to the multiplexer by communication lines in a first in-first out (FIFO) memory. The input/output devices are polled by sending the channel numbers from the FIFO to the input/output devices. An input/output device requesting service responds to its channel number. The remaining channel numbers in the FIFO are recirculated to give the receive channel numbers priority over the transmit channel numbers. This gives high priority to a most recently used receive channel operative in a burst mode and equal priority to all transmit channels.

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