Travel With Trashman: Routine at 8519

8519: Select Yes/ No

Used by the routines at Select1Or2PlayerGame and Handler_SubGame.
Select_Yes/No	8519	CALL PauseCheck	Call PauseCheck.
Set up to print "No".
Select_No	851C	LD HL,$8C10	HL=Messaging_No.
	851F	CALL Select_GetInput	Call Select_GetInput.
	8522	JR Z,Select_Yes	Jump to Select_Yes if "Yes" was selected.
	8524	AND A	Set flags.
	8525	RET	Return.
Set up to print "Yes".
Select_Yes	8526	LD HL,$8C23	HL=Messaging_Yes.
	8529	CALL Select_GetInput	Call Select_GetInput.
	852C	JR Z,Select_No	Jump to Select_No if "No" was selected".
	852E	RET	Return.
Prints the current choice, and handles the player input.
Select_GetInput	852F	LD DE,$509B	DE=509B (screen buffer location).
	8532	CALL Print_String	Call Print_String.
Keep looping round until the player either chooses, or changes their choice.
Select_Yes/No_Loop	8535	LD B,$0A	Call 8055 with a count of 0A.
	8537	CALL $8055	Call 8055 with a count of 0A.
	853A	CALL Handler_Controls	Call Handler_Controls.
	853D	LD A,E	A=the control byte.
	853E	AND %00101000	Keep only bits 3 ("down") and 5 ("fire").
	8540	CP $08	Return if "down" was pressed.
	8542	RET Z	Return if "down" was pressed.
	8543	CP $28	Jump to Select_Yes/No_Loop if there was no input from the player.
	8545	JR Z,Select_Yes/No_Loop
	8547	RET	Else, "fire" was pressed - just return.