Bi-directional parallel printer interface

Details Bi-directional parallel printer interface Bi-directional parallel printer interface

1991-03-26

1993-08-24

Richardson, Robert L.

G06F 1300, G06F 312

Patent

active

052396274

ABSTRACT:
A parallel interface connects a data processor and a printer so that each may transmit information to the other or receive information from the other. The transmitted information from the data processor can be data or status signals. The data or status signals are transmitted over the same eight information lines between the data processor and the printer with a predetermined signal being sent over another line from the data processor to the printer prior to transmission over the eight lines to identify whether the transmitted information is data or status signals. The printer sends status signals to the data processor over the same eight information lines after sending a predetermined signal to the data processor over a further line that it is going to transmit.

REFERENCES:
patent: 4651278 (1987-03-01), Herzog et al.
patent: 4702813 (1988-01-01), Kaneko
patent: 4825404 (1989-04-01), Theus

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