| 摘要 |
The present invention, Extended Port Addressing (EPA), is a physical link layer communication protocol for enumeration of more than one device (102, 103, 104) attached to the same parallel port on a desktop personal computer (101) . EPA automatically determines individual devices (102, 103, 104) 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 (105, 106). <IMAGE>
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