Routines
Prev: 27798 Up: Map Next: 27870
27830: Print Scores
Used by the routines at AddPointsToScore and CreateWindow.
Prints the score or the high score at the top of the screen, as six BCD digits. The same code (from PrintScore) also prints other BCD numbers, such as the miles and the time.
Before After
print-scores-before print-scores-after
Sets up the player score.
Score_1UP 27830 LD HL,16397 HL=16397 (screen location of the score).
27833 LD DE,24140 Point DE at the score (Score_1).
27836 JR PrintScore Jump to PrintScore.
This entry point is used by the routine at CreateWindow.
Sets up the HI score.
Score_HI 27838 LD HL,16408 HL=16408 (screen location of the high score).
27841 LD DE,24137 Point DE at the high score (High_Score).
Prints the score. Entering at PrintScore_Loop prints B bytes (two digits each) of the BCD number at DE to the screen location in HL.
PrintScore 27844 LD B,3 Set the byte counter to 3 (a score is 3 bytes, so 6 digits).
This entry point is used by the routine at DisplayMiles.
PrintScore_Loop 27846 LD A,(DE) Fetch the next byte of the number, which holds two digits.
27847 RRCA A=A / 16 (the first digit).
27848 RRCA
27849 RRCA
27850 RRCA
27851 AND %00001111 Keep only bits 0-3.
27853 ADD A,48 Add 48 to convert the digit to ASCII.
27855 CALL PrintScreen Call PrintScreen to print the digit.
This entry point is used by the routines at DisplayCupsCollected, DisplayMiles and PrintBestTime.
Prints the second digit of the byte; entering here skips the first digit.
PrintScore_SecondDigit 27858 LD A,(DE) Fetch the byte again, for the second digit.
27859 AND %00001111 Keep only bits 0-3.
27861 ADD A,48 Add 48 to convert the digit to ASCII.
27863 CALL PrintScreen Call PrintScreen to print the digit.
27866 INC DE Move on to the next byte of the number.
27867 DJNZ PrintScore_Loop Decrease the byte counter by one and loop back to PrintScore_Loop until all of the bytes have been printed.
27869 RET Return.
View the equivalent code in;
Prev: 27798 Up: Map Next: 27870