Claims
- 1. A computer system operable as a platform for symbol reading scanners so that the computer controls a scanner and processes data from the scanner representing symbols read by the scanner for decoding the symbols into information corresponding thereto, said system comprising:
- a general purpose computer separate from the scanner and having a communications port connectable to the scanner for receiving undecoded data representing the symbols via a communications link between the scanner and the port;
- means in said computer responsive to said communications over said link indicating that the scanner is in data communicating relationship with said computer over said link and that said computer is ready to decode the data;
- means in said computer for transmitting and receiving commands necessary for controlling the scanner;
- means for translating said data into a format for decoding; and
- means connected in said link for preventing unauthorized transfer of data into and out of said computer.
- 2. The system according to claim 1 wherein:
- said link has a plurality of lines;
- said computer has means for transmitting signals over a first of said lines and for receiving signals from the scanner over a second of said lines; and
- said means for preventing unauthorized transfer includes means responsive to a predetermined sequence of signals transmitted over said first line for providing an output on said second line to authorize said computer to transfer data.
- 3. The system according to claim 2 wherein said signals carried over said first line represent requests from said computer to send signals, and said computer receives signals representing readiness to receive data over said second line.
Parent Case Info
This application is a continuation of application Ser. No. 08/283,923, filed Aug. 1, 1994, now abandoned which is a continuation of application Ser. No. 08/059,796, filed May 10, 1993 now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0462772 |
Dec 1991 |
EPX |
Continuations (2)
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Number |
Date |
Country |
Parent |
283923 |
Aug 1994 |
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Parent |
59796 |
May 1993 |
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