Keyboard: DKS2

       Name: DKS2                                                    [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Read the joystick position
    Context: See this subroutine in context in the source code
 References: No direct references to this subroutine in this source file


 This routine is not used in this version of Elite. It is left over from the
 BBC Micro version.


.DKS2

 LDA KTRAN+7,X          ; Fetch either the joystick X value or joystick Y value
                        ; from the key logger buffer, depending on the value of
                        ; X (i.e. fetch either KTRAN+8 or KTRAN+0)

 EOR JSTE               ; The high byte A is now EOR'd with the value in
                        ; location JSTE, which contains $FF if both joystick
                        ; channels are reversed and 0 otherwise (so A now
                        ; contains the high byte but inverted, if that's what
                        ; the current settings say)

 RTS                    ; Return from the subroutine