Online HelpPC 2.10      Quick Reference Utility     Copyright 1991 David Jurgens

 
              INT 1A,80 - Setup Sound Multiplexer  (PCjr only)              
                                                                                
                                                                                
        AL = 00 - source is 8253 channel 2                                      
           = 01 - source is cassette input                                      
           = 02 - source is I/O channel "AUDIO IN"                              
           = 03 - source is sound generator chip                                
                                                                                
                                                                                
 

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