Input/output controller circuit using a single transceiver to se

Details Input/output controller circuit using a single transceiver to se Input/output controller circuit using a single transceiver to se

1992-10-16

1995-05-16

Lee, Thomas C.

Boots, shoes, and leggings

364238, 3642382, 3642383, 364DIG1, G06F 300

Patent

active

054169097

ABSTRACT:
An input/output (I/O) controller uses a single transceiver to service multiple I/O ports in a small computer system, such as an IBM PS/2 computer. Arbitration logic controls the access of the ports to the transceiver, and once the arbitration logic directs one of the ports to the transceiver, all other I/O devices are locked out until the transfer to or from the current I/O device is complete. Once the current transfer is complete, the arbitration logic then goes back to arbitrating, looking for the next I/O device that needs service. The associated circuitry to implement the arbitration and control logic is much smaller than the circuitry required for an additional transceiver, resulting in a lower system cost.

REFERENCES:
patent: 4100601 (1978-07-01), Kaufman et al.
patent: 4124889 (1978-11-01), Kaufman et al.
patent: 4396915 (1983-08-01), Farnsworth et al.
patent: 4574355 (1986-03-01), Beatty et al.
patent: 4825402 (1989-04-01), Jalali

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