The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
Switch P1 (↑ RTS Switches)
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Switch: P1
Function: Sounds the system bell by using a call to the BIOS.
Default: Off
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