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- &H378 255 254 253 252
- The values are &H378 for the port (LPT1), followed by the function codes 255
- for no tone, and 254 for 300 Hz, 253 for 730 Hz, and 252 for 1800 Hz tones,
- respectively. To select LPT2 change the port address to &H278. The port and
- function codes could be chosen arbitrarily for other tone generator designs.
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