Communications protocol

Details Communications protocol Communications protocol

1994-01-04

1996-10-15

Tse, Young T.

Pulse or digital communications

Miscellaneous

375272, 345 8, 370 8511, 370 941, H04B 166

Patent

active

055657451

ABSTRACT:
A protocol for communication between devices connected via a bus having three handshake lines and at least one data line. A first device controls two of the three handshake lines, and a second device controls the third. The first device mixes toggling of the first and second handshake lines in a pattern which identifies a type of information packet. The second device polls the first and second handshake lines, and from the toggling pattern identifies the packet type. Once identified, the packet is transmitted according to a predefined format for the type. Typically, transmission of information is completed asynchronously using the handshake lines to carry request and acknowledge signals. In one embodiment, the protocol is implemented in a virtual reality system having a video game console as a first device and a head mounted display as the second device.

REFERENCES:
patent: 4486750 (1984-12-01), Aoki
patent: 4536759 (1985-08-01), DiMassimo et al.
patent: 4782498 (1988-11-01), Copeland, III
patent: 5339395 (1994-08-01), Pickettet

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