| 摘要 |
PCT No. PCT/DE96/01463 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Aug. 5, 1996 PCT Pub. No. WO97/16771 PCT Pub. Date May 9, 1997A unified bus system is used for communication in a printer or copier apparatus. Each functional unit of the printer or copier apparatus is connected to the bus by an interface. The interface includes a duel-port RAM memory unit in which data messages associated with the specific functional unit or sensors in the printer or copier apparatus are stored. The functional units are notified of the presence of new data or messages on demand so that each functional unit has an overall picture of the functional status of the printer or copier.
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