Data entry interface assembly

Details Data entry interface assembly Data entry interface assembly

1984-05-18

1987-01-20

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 300

Patent

active

046384227

ABSTRACT:
An interface assembly enables a number of remote data entry terminals to transmit information to a computer. The interface assembly 30 comprises a memory buffer 42 comprising one byte of memory for each terminal 32. The terminals 32 are hard-wired to individual memory addresses, so that each byte of the memory is driven to the value dictated by the user's last input at its respective terminal. An address generator 44 repeatedly scans the memory buffer 42, transmits to an interface 50, 52 or 54 information identifying the address and the byte value held at that address and resets the address to a null value. In this way the input information is transmitted byte by byte to the CPU through the same interface which is chosen for its handshake compatibility with the CPU. If desired plural interfaces may be provided in the assembly, so that the CPU may simply be plugged into that one which is compatible.

REFERENCES:
patent: 4407016 (1983-09-01), Bayliss et al.

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