Int 1AH [PC] Function 80H (128) Set sound source

Sets up the source for tones that will appear on the PCjr's "Audio Out" or RF modulator.

Call with:

AH = 80H

AL = sound source

00H if 8253 programmable timer, channel 2

01H if cassette input

02H if "Audio In" line on I/O channel

03H if sound generator chip

Returns:

Nothing

Note:

This function is supported on the PCjr only.