Dashboard: UpdateIndicator (Part 1 of 15)

       Name: UpdateIndicator (Part 1 of 15)                          [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Update a single indicator on the dashboard
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ResetVariables calls UpdateIndicator
             * UpdateDashboard calls UpdateIndicator
             * UpdateFlightModel (Part 2 of 4) calls UpdateIndicator


 Arguments:

   X                    Indicator number:

                          * 0 = Compass

                          * 1 = Airspeed indicator

                          * 2 = Altimeter
                                Small "hour" hand, whole dial = 10,000 feet

                          * 3 = Altimeter
                                Large "minute" hand, whole dial = 1,000 feet

                          * 4 = Vertical speed indicator

                          * 5 = Turn indicator
                                Bottom part of the slip-and-turn indicator

                          * 6 = Slip indicator
                                Top part of the slip-and-turn indicator

                          * 7 = Artificial horizon

                          * 8 or 10 = Joystick position display

                          * 9 = Rudder indicator

                          * 11 = Thrust indicator


.UpdateIndicator

 STX WW                 \ Set WW to the value in X, so we can refer to it later
                        \ if we overwrite the value in X

 CPX #0                 \ If X = 0, jump down to uind1 to update indicator 0
 BEQ uind1

 CPX #2                 \ If X < 2 (i.e. X = 1), jump down to uind2 to update
 BCC uind2              \ indicator 1

 BEQ uind4              \ If X = 2, jump down to uind4 to update indicator 2

 JMP uind7              \ X > 2, so jump down to uind7 to check for more values
                        \ of X