Drivers: ZeroTimer

       Name: ZeroTimer                                               [Show more]
       Type: Subroutine
   Category: Drivers
    Summary: Zero the specified timer
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * AddTimeToTimer calls ZeroTimer
             * MainDrivingLoop (Part 1 of 5) calls ZeroTimer
             * ResetVariables calls ZeroTimer
             * UpdateLapTimers calls ZeroTimer


 Arguments:

   X                    The timer to set to zero:

                          * 0 = the clock timer
                                (clockMinutes clockSeconds clockTenths)

                          * 1 = the lap timer
                                (lapMinutes lapSeconds lapTenths)


 Returns:

   A                    A = 0 and the Z flag is set (so a BEQ will branch)


.ZeroTimer

 LDA #0                 \ Zero clockTenths or lapTenths
 STA clockTenths,X

 STA clockSeconds,X     \ Zero clockSeconds or lapSeconds

 STA clockMinutes,X     \ Zero clockMinutes or lapMinutes

 RTS                    \ Return from the subroutine