Device for interfacing point of sale systems with external perip

Details Device for interfacing point of sale systems with external perip Device for interfacing point of sale systems with external perip

1995-06-05

1998-01-27

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

34082535, 235382, 235 2, 902 22, 36491851, G07G 114

Patent

active

057126291

ABSTRACT:
A device (12) for interfacing an external peripheral unit (18) to a store controller (16) and store terminal (14) of a point of sale (POS) system has been provided. The interface device includes an MPU (50) for passively monitoring the data coming from the store terminal without causing any interruption to the POS system. When a specific key sequence indicative of a request for use of the peripheral unit has been detected, the device interrupts the flow of data between the store controller and store terminal and enables the MPU to now send data to the store controller and store terminal. Additionally, the device provides a plurality of data paths for allowing the MPU to read data from the store terminal, for storing and reading data from the store controller, and for transferring data between the MPU and the peripheral unit. By controlling the flow of data between the store controller, the store terminal and the peripheral unit, the interface device allows the peripheral unit to operate automatically with the POS system.

REFERENCES:
patent: 3946220 (1976-03-01), Brobeck et al.
patent: 4410961 (1983-10-01), Dlugos et al.
patent: 4729097 (1988-03-01), Takaoka et al.
patent: 5253345 (1993-10-01), Fernandes et al.
patent: 5258655 (1993-11-01), May et al.
patent: 5398191 (1995-03-01), Komai

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