Printer with speaker to indicate print error conditions

Details Printer with speaker to indicate print error conditions Printer with speaker to indicate print error conditions

2007-09-11

2007-09-11

Grant, Jerome (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Plotter

C710S022000

Reexamination Certificate

active

10992717

ABSTRACT:
A printer includes a speaker to indicate print error conditions. The speaker is driven by a speaker interface that is responsive to the printer's processor. The speaker interface includes a DMA FIFO circuit that responds to DMA mediated requests, initiated by the processor programming a dedicated channel of its DMA controller, to retrieve sound files stored in memory. A digital-to-analog converter and amplifier are provided to convert retrieved sound files to an analog signal suitable to drive the speaker.

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