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⌂ ∞ ▽ Revs on the BBC Micro

Text: PrintLapTime

       Name: PrintLapTime                                            [Show more]
       Type: Subroutine
   Category: Text
    Summary: Print the current lap time at the top of the screen

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * UpdateLapTimers calls PrintLapTime
             * UpdateLapTimers calls via PrintLapTime+2




 This routine prints the current lap time in the header at the top of the
 screen in the following format:

   * Minutes: No leading zeroes, print both digits
   * Seconds: Leading zeroes, print both digits
   * Tenths: Do not print tenths of a second



 Other entry points:

   PrintLapTime+2       Format the lap time using the format value in A (see
                        PrintTimer for details)



.PrintLapTime

 LDA #%00101000         \ Set A so the current lap time is printed in the
                        \ following format by the call to PrintTimer:
                        \
                        \   * %00 Minutes: No leading zeroes, print both digits
                        \   * %10 Seconds: Leading zeroes, print both digits
                        \   * %1  Tenths: Do not print tenths of a second

 LDX #10                \ Move the cursor to character column 10 (to just after
 STX xCursor            \ "Lap time" in token 40)

 LDX #33                \ Move the cursor to pixel row 33 (i.e. the second text
 STX yCursor            \ line at the top of the screen)

 LDX #21                \ Print (lapMinutes lapSeconds lapTenths) in the format
 JSR PrintTimer         \ given in A

 RTS                    \ Return from the subroutine