Extended addressing to multiple devices on a single parallel I/O

Details Extended addressing to multiple devices on a single parallel I/O Extended addressing to multiple devices on a single parallel I/O

1996-05-20

1999-05-04

Black, Thomas G.

395287, 395822, 39518319, 395670, 395281, G06F 1300

Patent

active

059013257

ABSTRACT:
The present invention, Extended Port Addressing (EPA), is a physical link layer communication protocol for enumeration of more than one device attached to the same parallel port on a desktop personal computer. EPA automatically determines individual devices as they are added or removed from the parallel port. EPA also allows time sharing of device drivers to a particular device without any one device driver locking the logical port. EPA extends plug `n` play characteristics by determining if other devices share the same parallel port when attached to a T-box EPA device.

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patent: 5555436 (1996-09-01), Gavish
patent: 5557741 (1996-09-01), Jones
patent: 5619659 (1997-04-01), Kikinis et al.
patent: 5619722 (1997-04-01), Lovrenich

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