Sound generation and disk speed control apparatus for use with c

Details Sound generation and disk speed control apparatus for use with c Sound generation and disk speed control apparatus for use with c

1987-05-19

1990-03-20

Clark, David L.

Boots, shoes, and leggings

360 7308, 358903, 273DIG28, 84 101, G06F 3153, G06F 316, G06F 1200

Patent

active

049106708

ABSTRACT:
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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