Data transmission error detection in an electronic cash register

Details Data transmission error detection in an electronic cash register Data transmission error detection in an electronic cash register

1990-02-02

1991-09-24

Smith, Jerry

Boots, shoes, and leggings

371 34, 371 71, G07G 112, H04L 114

Patent

active

050518992

ABSTRACT:
A data error-checking system including a transmitting cash register and a receiving cash register, connected to each other in series in a loop formation. Its operation includes the serial transfer of data from the transmitting cash register to the receiving cash register simultaneous with data transfer from the receiving cash register to the transmitting cash register, and comparison of the data transferred from the transmitting cash register with the corresponding data transferred back from the receiving cash register to the transmitting cash register.

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"Write Data Wrap Test," Danen et al., IBM T.D.B., vol. 26, No. 10A, 3/84, p. 4879.

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