| 摘要 |
A method of checking a parallel port of a personal computer using loopback includes the steps of loopback-connecting pins corresponding to control signals and data signals transmitted to a printer to pins corresponding to status signals transmitted to the computer, checking whether there is a parallel port, stopping the checking when there is no parallel port, generating the control signals and reading looped-back status signals after a predetermined time to check control pins, and generating the data signals and reading looped-back status signals after a predetermined time to check data pins. Accordingly, a parallel port of a personal computer is tested without being connected to a printer, thereby simplifying the a production process. Also, manual printing is not required, thereby reducing test time and production time.
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