Method for performing writes of non-contiguous bytes on a PCI bu

Details Method for performing writes of non-contiguous bytes on a PCI bu Method for performing writes of non-contiguous bytes on a PCI bu

1994-03-07

1995-09-05

Ray, Gopal C.

Static information storage and retrieval

Magnetic bubbles

Guide structure

395821, 395427, 36518905, 365221, 364239, 3642391, 3642397, 364240, 364DIG1, G06F 1300

Patent

active

054487048

ABSTRACT:
A PCI bus writes non-contiguous data in a maximum of two PCI bus write cycles. A Bridge is provided which can combine data within its write buffer such that non-contiguous data results. Some I/O devices on the PCI bus cannot handle non-contiguous data, so the Bridge detects non-contiguous data, and generates appropriate write cycles to the PCI bus to transfer this data in a contiguous fashion. The method described takes advantage of the multiple data phase capability of the PCI bus to transfer data at more than one address during one PCI bus write cycle, and optimizes these transfers to assure that all non-contiguous transfers can occur in only two PCI bus write cycles.

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