Utility routines: FX200

       Name: FX200                                                   [Show more]
       Type: Subroutine
   Category: Utility routines
    Summary: Set the behaviour of the ESCAPE and BREAK keys
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * BR1 (Part 1 of 2) calls FX200


 This is the equivalent of a *FX 200 command, which controls the behaviour of
 the ESCAPE and BREAK keys.


 Arguments:

   X                    Controls the behaviour as follows:

                          * 0 = Enable ESCAPE key
                                Normal BREAK key action

                          * 1 = Disable ESCAPE key
                                Normal BREAK key action

                          * 2 = Enable ESCAPE key
                                Clear memory if the BREAK key is pressed

                          * 3 = Disable ESCAPE key
                                Clear memory if the BREAK key is pressed


.FX200

 LDY #0                 \ Call OSBYTE 200 with Y = 0, so the new value is set to
 LDA #200               \ X, and return from the subroutine using a tail call
 JMP OSBYTE