Dynamic address assignment system

Details Dynamic address assignment system Dynamic address assignment system

G - Physics

06

F

354/233

G06F 12/06 (2006.01) H04L 29/12 (2006.01)

Patent

CA 1249374

- 23 - ABSTRACT For a computer system having peripheral devices coupled to a common bus through interface devices transmitting and receiving messages containing an ad- dress code matching a stored address code, a dynamic address assignment system stores a unique address code in each interface device following system startup. On system startup each interface device stores a type number and an adjustable serial number, type numbers for peripheral devices of the same type being identical while serial numbers for all peripheral devices of the same type are adjusted to different values. A master controller transmits to all peripheral devices a series of universally addressed count commands. each inter- face device counts the count commands and, when the count reaches a poll number determined by the unique combination of stored type and serial numbers, requests and obtains a unique address code from the host compu- ter. The interface device thereafter stores and uses the unique address code in transmitting and receiving messages on the bus.

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