Method and apparatus for driving a parallel part to provide mult

Details Method and apparatus for driving a parallel part to provide mult Method and apparatus for driving a parallel part to provide mult

1997-03-31

1999-12-21

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral configuration

710 29, 710 31, 710 35, 710 52, 709301, G06F 1300, G06F 1314

Patent

active

060062843

ABSTRACT:
A system and method for providing multiple modes of parallel communications between a host and a peripheral. In the system and method, a driver provides support for a plurality of transfer modes while satisfying the streams requirements of a host kernel during both forward and reverse transfers. The driver begins in a known mode and negotiates the host and peripheral into a best mode supported by both the host and the peripheral. The driver satisfies streams requirements, thereby permitting high level handshaking and use of ioct1s in UNIX based systems. When data is to be transferred, a message is placed on a queue to be serviced in the order received. The type of the message is indicative of the direction of the desired transfer. Each message is serviced in turn, and the transfer conducted using the most efficient mode available.

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