Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral adapting
Patent
1998-09-09
2000-04-04
Teska, Kevin J.
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral adapting
710112, 710126, 710128, G06F 1300
Patent
active
060471204
ABSTRACT:
The dual mode bus bridge accommodates either two 64-bit personal computer interface (PCI) buses or four 32-bit PCI buses. In either case, only a single load is applied to the host bus. The dual mode bridge includes a bridge controller unit connected to a pair of expansion bridge units by respective internal buses. Each expansion bridge unit includes two sets of 64-bit wide queues and buffers. For 32-bit PCI operation, the two sets of queues and buffers are operated in parallel. For 64-bit PCI operation, the two sets of queues and buffers are linked together so as to appear in series to provide a single queue structure having twice the depth of the separate queue structures for a 32-bit mode operation. As such, undue duplication of queue and buffer resources is avoided. Method and apparatus embodiments of the invention are described.
REFERENCES:
patent: 5590287 (1996-12-01), Zeller et al.
patent: 5592631 (1997-01-01), Kelly et al.
patent: 5682484 (1997-10-01), Lambrecht
patent: 5828865 (1998-10-01), Bell
patent: 5884027 (1999-03-01), Garbus et al.
patent: 5941970 (1999-08-01), Lange
Intel Corporation
Phan Thai
Teska Kevin J.
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