Microprocessor based computer terminal

Details Microprocessor based computer terminal Microprocessor based computer terminal

1979-06-25

1983-09-20

Heckler, Thomas M.

Boots, shoes, and leggings

G06F 3023

Patent

active

044059787

ABSTRACT:
An apparatus for conducting input output operations with another data processing device in a flexible and low cost manner is comprised of a programmed microprocessor coupled to a keyboard, a parallel port, and a modem. The microprocessor is programmed to periodically scan the keyboard to determine what keys if any are depressed. It also scans the parallel port for incoming data and senses incoming data from the modem by sensing a start bit. Control characters from the keyboard can set options such that incoming data from an input can be simultaneously sent out from the modem and/or parallel port.

REFERENCES:
patent: 3686637 (1972-08-01), Zachar et al.
patent: 4014004 (1977-03-01), Fuller
patent: 4091448 (1978-05-01), Clausing
patent: 4107784 (1978-08-01), Van Bemmelen
patent: 4186438 (1980-01-01), Benson et al.
patent: 4222111 (1980-09-01), Sloan et al.

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