Sound generation and disk speed control apparatus for use...

Details Sound generation and disk speed control apparatus for use... Sound generation and disk speed control apparatus for use...

G - Physics

06

F

354/237, 354/47,

G06F 3/16 (2006.01) G06F 3/06 (2006.01) G11B 19/24 (2006.01) G11B 19/247 (2006.01) G11B 19/28 (2006.01)

Patent

CA 1226961

ABSTRACT OF THE DISCLOSURE An apparatus for generating an analog audio signal and a speed control signal for a disk drive for use with a microprocessor having a RAM which provides a video signal for a raster scanned display. Direct addressing to the RAM is used during horizontal blanking periods to allow data to be read from the RAM and used to generate the audio and speed control signals. The data is updated during the blanking periods. The speed control signal to the disk controller varies as a function of track (radius).

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