PSSST: Routine at 28815

Used by the routine at GameOver_ControllerRestart.

Finds the higher of the scores of the two players and, if that is higher than the high score at High_Score, makes it the new high score. The scores are stored as three BCD bytes with the most significant byte first.

Used by the routine at GameOver_ControllerRestart. Finds the higher of the scores of the two players and, if that is higher than the high score at High_Score, makes it the new high score. The scores are stored as three BCD bytes with the most significant byte first.
UpdateHighScore	28815	LD HL,(24069)	HL=the first two bytes of the score of 1UP.
	28818	LD DE,(24072)	DE=the first two bytes of the score of 2UP.
	28822	LD A,L	Swap H and L so that the most significant byte is in H.
	28823	LD L,H
	28824	LD H,A
	28825	LD A,E	Swap D and E so that the most significant byte is in D.
	28826	LD E,D
	28827	LD D,A
	28828	AND A	Compare the first two bytes of the scores.
	28829	SBC HL,DE	Compare the first two bytes of the scores.
	28831	JR C,UpdateHighScore_2UP	Jump to UpdateHighScore_2UP if 2UP has the higher score.
	28833	JR NZ,UpdateHighScore_1UP	Jump to UpdateHighScore_1UP if 1UP has the higher score.
	28835	LD A,(24071)	E=the last byte of the score of 1UP.
	28838	LD E,A	E=the last byte of the score of 1UP.
	28839	LD A,(24074)	A=the last byte of the score of 2UP.
	28842	CP E	Compare the last bytes of the scores.
	28843	JR C,UpdateHighScore_1UP	Jump to UpdateHighScore_1UP if 1UP has the higher score.
UpdateHighScore_2UP	28845	LD HL,24072	HL=2UP_Score_1 (the score of 2UP).
UpdateHighScore_Compare	28848	PUSH HL	Stash the pointer to the score on the stack.
	28849	LD DE,24064	DE=High_Score (the high score).
	28852	LD B,3	Set the byte counter to 3.
UpdateHighScore_Loop	28854	LD A,(DE)	Jump to UpdateHighScore_Copy if the high score is lower than the score.
	28855	CP (HL)
	28856	JR C,UpdateHighScore_Copy
	28858	JR NZ,UpdateHighScore_Done	Jump to UpdateHighScore_Done if the high score is higher than the score.
	28860	INC HL	Move onto the next byte of each.
	28861	INC DE	Move onto the next byte of each.
	28862	DJNZ UpdateHighScore_Loop	Decrease the byte counter by one and loop back to UpdateHighScore_Loop until all three bytes have been compared.
UpdateHighScore_Done	28864	POP HL	Restore the pointer from the stack.
	28865	RET	Return.
UpdateHighScore_Copy	28866	POP HL	Restore the pointer from the stack.
	28867	LD DE,24064	DE=High_Score (the high score).
	28870	LD BC,3	BC=3.
	28873	LDIR	Copy the score to the high score.
	28875	RET	Return.
UpdateHighScore_1UP	28876	LD HL,24069	HL=1UP_Score_1 (the score of 1UP).
	28879	JR UpdateHighScore_Compare	Jump to UpdateHighScore_Compare.