Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring
Patent
1998-04-30
2000-10-31
Lee, Thomas C.
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral monitoring
710 7, 710 8, 710 20, G06F 1314
Patent
active
061417041
ABSTRACT:
A method of controlling a parallel port for connecting multiple devices is disclosed. The method controls the connection between a computer and one of the peripheral devices by way of using the different on-line codes corresponding to the peripheral devices respectively. Further, a common off-line code is set and shared by all peripheral devices. When the off-line code is sent out, all peripheral devices are disconnected from the computer, and the control status of the previous on-line device is backed up for the use of recovering the previous on-line state. Furthermore, a parallel port for connecting multiple devices is also proposed to incorporate with the controlling method such that the computer can switch the on-line state between an on-line peripheral device and the other peripheral standby devices.
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Kim Harold
Lee Thomas C.
Mustek Systems Inc.
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