Everyone's a Wally: Routine at 80E5

80E5: Game Selection Menu

Used by the routines at Demo_Start and GameLoop.
GameMenu	80E5	CALL Clear_Screen	Call Clear_Screen.
	80E8	CALL Initialise_Theme_Music	Call Initialise_Theme_Music.
Print up all the options.
GameMenu_Loop	80EB	LD HL,$7DC6	HL=Messaging_Splash.
	80EE	LD DE,$0003	DE=0003.
	80F1	CALL PrintString	Call PrintString.
Set up displaying the active game option.
	80F4	LD HL,$7E37	HL=Messaging_Key.
Calculate the screen position of the active control method.
	80F7	LD A,($B2DB)	B=02-*Game_Options.
	80FA	LD B,A
	80FB	LD A,$02
	80FD	SUB B
	80FE	LD B,A
D contains the vertical position.
	80FF	ADD A,A	D=(B*08)-B.
	8100	ADD A,A
	8101	ADD A,A
	8102	SUB B
	8103	LD D,A
And E is hardcoded for the horizontal position.
	8104	LD E,$03	E=03.
Print the active key to the screen, this just overwrites the one which is already present (so turns it white).
	8106	CALL PrintString	Call PrintString.
GameMenu_Initialise	8109	LD A,$FF	Write FF to TempStore_GameOptions.
	810B	LD ($B4E9),A	Write FF to TempStore_GameOptions.
	810E	CALL Check_Music	Call Check_Music.
Check if demo mode should start.
	8111	LD A,($B55F)	If Flag_DemoMode is not zero jump to Demo_Start.
	8114	OR A
	8115	JR NZ,Demo_Start
	8117	LD A,($B4E9)	A=*TempStore_GameOptions.
Handler for selecting "Sinclair Joystick".
	811A	BIT 0,A	If bit 0 is not set, jump to GameMenu_Kempston.
	811C	JR NZ,GameMenu_Kempston	If bit 0 is not set, jump to GameMenu_Kempston.
	811E	CALL Game_Options_Sinclair	Call Game_Options_Sinclair.
	8121	JR GameMenu_Loop	Jump to GameMenu_Loop.
Handler for selecting "Kempston Joystick".
GameMenu_Kempston	8123	BIT 1,A	If bit 1 is not set, jump to GameMenu_Keyboard.
	8125	JR NZ,GameMenu_Keyboard	If bit 1 is not set, jump to GameMenu_Keyboard.
	8127	CALL Game_Options_Kempston	Call Game_Options_Kempston.
	812A	JR GameMenu_Loop	Jump to GameMenu_Loop.
Handler for selecting "Keyboard".
GameMenu_Keyboard	812C	BIT 2,A	If bit 2 is not set, jump to GameMenu_StartGame.
	812E	JR NZ,GameMenu_StartGame	If bit 2 is not set, jump to GameMenu_StartGame.
	8130	CALL Game_Options_Keyboard	Call Game_Options_Keyboard.
	8133	JR GameMenu_Loop	Jump to GameMenu_Loop.
Handler for selecting "Start".
GameMenu_StartGame	8135	BIT 3,A	If bit 3 is not set, jump to GameMenu_Initialise.
	8137	JR NZ,GameMenu_Initialise	If bit 3 is not set, jump to GameMenu_Initialise.
	8139	RET	Return.