1990-08-22
1992-06-09
Fleming, Michael R.
395275, 84645, G06F 300
Patent
active
051214911
ABSTRACT:
An interface which includes a MIDI send terminal having first and second pins for providing an output signal, an RS 232 terminal having first and second pins for receiving a signal from the MIDI send terminal, apparatus for coupling any MIDI output signal to the RS 232 terminal, the apparatus for coupling including apparatus for shifting a base level at which the signals are presented at the MIDI terminal to a base level at which the signals are received at the RS 232 terminal, apparatus for shifting the voltage swing of signals presented at the MIDI terminal to a voltage swing at which the signals are received at the RS 232 terminal, and apparatus for disabling the RS 232 terminal if a device to which the RS 232 terminal is connected would normally respond in an undesirable manner to unexpected data received on the RS 232 terminal.
REFERENCES:
patent: 4662261 (1987-05-01), Akutsu
patent: 4700604 (1987-10-01), Morikawa et al.
patent: 4744281 (1988-05-01), Isozaki
patent: 4768412 (1988-09-01), Sanderson
patent: 4776253 (1988-10-01), Downes
patent: 4945806 (1990-08-01), Merrill, Jr.
patent: 5011412 (1991-04-01), Rosenberg
patent: 5025701 (1991-06-01), Matsumoto
Evans David
Sloan Robert
Auve Glenn A.
Fleming Michael R.
Sun Microsystems Inc.
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