OSBYTE &49

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OSBYTE &49 (73): Integra-B calls
  On entry:
    X=&FF - returns X=&49 indicating Integra-B is present
  On exit:
    X=&49 - Integra-B is present
    X=&FF - call unsupported
  
  On entry:
     X=&FE - initialise alarm
  On exit:
     ???
  
  On entry:
     X=%0000mmtt - update RTCUpdateOptions
           Options are set to (oldOptions AND mm) EOR tt
           b0=Alarm generates a User Event
           b1=Alarm generates Service Call &49
     If the options are set to non-zero, the RTC interupt enable is updated

See Also


Jgharston (talk) 20:29, 3 April 2015 (UTC)