Contention handling apparatus for generating user busy signal by

Details Contention handling apparatus for generating user busy signal by Contention handling apparatus for generating user busy signal by

1990-10-12

1994-04-05

Lee, Thomas C.

Boots, shoes, and leggings

395325, 395800, 3642426, 3642427, 364DIG1, 36493701, G06F 1314, G06F 1300

Patent

active

053013301

ABSTRACT:
Contention handling apparatus which receives access request signals from a number of users and processes these requests to allow controlled access to a shared resource. The contention handling apparatus includes a number of access blocks, with one of the access blocks being associated with each user. A busy line of each of the access blocks is connected to receive a busy signal; the busy signal being an access request signal from a higher priority user, thereby indicating that the shared resource is unavailable. Each access block receiving a busy signal, latches the corresponding access request signal until the busy signal is deasserted. If the busy signal and the access request signal occur at the same time, the corresponding access block generates a wait output signal. The logical sum of the wait output of an access block associated with a next higher priority user and the access request signals of all the higher priority users serves as the busy signal for one of the access blocks.

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