Memory transfer unit

Details Memory transfer unit Memory transfer unit

1983-12-08

1986-04-29

Springborn, Harvey E.

Boots, shoes, and leggings

34081504, G06F 3023, G06F 924, G08B 500

Patent

active

045861579

ABSTRACT:
A memory transfer unit is provided which permits replacing messages stored in a message display system with a different set of messages stored in the memory transfer unit. A circuit is provided for supplying power from the message display system to the memory transfer unit and for inhibiting operation of the memory transfer unit unless the power supply to it has a proper operating voltage level. Pulses produced in the message display system are counted to determine the sequential locations of data in the memory transfer unit to be transferred to the message display unit for substitution for data stored in the message display unit.

REFERENCES:
patent: 3906457 (1975-09-01), Mattedi et al.
patent: 4325062 (1982-04-01), Devlin
patent: 4438432 (1984-03-01), Hurcum
patent: 4500880 (1985-02-01), Gomersall

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