Computer system having dynamically programmable linear/fairness

Details Computer system having dynamically programmable linear/fairness Computer system having dynamically programmable linear/fairness

1994-09-29

1996-04-09

Teska, Kevin J.

Boots, shoes, and leggings

395728, 3642419, 3642426, 3642427, 3642428, G06F 1336

Patent

active

055069720

ABSTRACT:
A computer system having a plurality of devices which transmit and receive information over a channel is presented. The system includes, in the preferred embodiment, a central arbitration control circuit and a local arbiter associated with each device contending for channel access. Each local arbiter, corresponding to a device which desires channel access, generates a channel request signal to the central control circuit. At the appropriate time when the channel becomes available, the central control circuit generates an arbitrate signal. All local arbiters, then contending for channel access, compare the priority level on the arbitration bus with the priority value of the device it is arbitrating on behalf of, with the winning device gaining access to the channel. Each of the local arbiters contains a programmable circuit which enables the arbiter to operate either utilizing a linear priority arbitration technique or a fairness priority arbitration technique. Thus, each device is dynamically programmable to operate in a linear mode or a fairness mode depending on user and/or application needs. Additionally, each local arbiter includes a circuit which detects whether the device is a burst transfer device or a single transfer device.

REFERENCES:
patent: 4257095 (1981-03-01), Nadir
patent: 4703420 (1987-10-01), Irwin
patent: 4787033 (1988-11-01), Bomba et al.

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