| 摘要 |
The switching module system comprises a plurality of controllers for controlling system, a HDLC adaptor for using HDLC, a HDLC controller for controlling HDLC, a DMA controller for controlling memory, a line controller for controlling lines, switching printers for sensing status of line and printers, a buffer for managing the information of the switching printers, a switching controller for processing the information. Thus this invention enhances the utility of a passbook printer with sharing more than two printers by one controller.
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