Routines
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802C: Game Restart
Rebuilds the menu window, shows the hall of fame, then loops on the game selection keys until "6" starts a game.
Game_Restart 802C CALL CreateWindow Call CreateWindow.
802F CALL HallOfFame Call HallOfFame.
8032 CALL CreateWindow Call CreateWindow.
Draw the menu, then read keys "1"-"5".
GameSelect_Loop 8035 CALL GameMenu Call GameMenu.
8038 LD A,$F7 Read from the keyboard;
Port Number Bit
0 1 2 3 4
F7 1 2 3 4 5
803A OUT ($FD),A
803C IN A,($FE)
803E CPL Flip the bits.
803F LD E,A Store the key bits for the tests below.
8040 LD A,($5E00) Copy GameOptions to PreviousGameOptions.
8043 LD ($5E7C),A
Handle 1UP selection.
GameSelect_CheckP1 8046 BIT 0,E Jump to GameSelect_CheckP2 if "1" was not pressed.
8048 JR Z,GameSelect_CheckP2
804A RES 0,A Set a 1UP game.
Handle 2UP selection.
GameSelect_CheckP2 804C BIT 1,E Jump to GameSelect_CheckKeyboard if "2" was not pressed.
804E JR Z,GameSelect_CheckKeyboard
8050 SET 0,A Set a 2UP game.
Handle Keyboard selection.
GameSelect_CheckKeyboard 8052 BIT 2,E Jump to GameSelect_CheckKempston if "3" was not pressed.
8054 JR Z,GameSelect_CheckKempston
8056 AND %11111001 Set the control method to keyboard.
Handle Kempston Joystick selection.
GameSelect_CheckKempston 8058 BIT 3,E Jump to GameSelect_CheckCursor if "4" was not pressed.
805A JR Z,GameSelect_CheckCursor
805C AND %11111001 Clear the control method bits.
805E OR %00000010 Set the control method to Kempston.
Handle Cursor Joystick selection.
GameSelect_CheckCursor 8060 BIT 4,E Jump to GameSelect_StartGame if "5" was not pressed.
8062 JR Z,GameSelect_StartGame
8064 AND %11111001 Clear the control method bits.
8066 OR %00000100 Set the control method to cursor.
Write the options back, then test "6" to start.
GameSelect_StartGame 8068 LD ($5E00),A Write the updated options to GameOptions.
806B LD A,$EF Read from the keyboard;
Port Number Bit
0 1 2 3 4
EF 0 9 8 7 6
806D OUT ($FD),A
806F IN A,($FE)
8071 CPL Flip the bits.
8072 BIT 4,A Jump to StartGame if "6" was pressed.
8074 JP NZ,StartGame
Queue a jingle if the player count or control method changed since the last pass.
8077 LD A,($5E00) Copy the current game options into C.
807A LD C,A
807B LD A,($5E7C) Compare them with PreviousGameOptions.
807E XOR C
807F PUSH AF Stash the changed-option flags on the stack.
8080 BIT 0,A Call QueueMenuTune if the player count has changed.
8082 CALL NZ,QueueMenuTune
8085 POP AF Restore the changed-option flags from the stack.
8086 AND %00000110 Keep only the control method bits.
8088 JR Z,Game_Restart_FlashSelection Jump to Game_Restart_FlashSelection if the control method is unchanged.
Queue the jingle for the newly selected control method.
808A LD DE,$BA9E Set the tune table pointer to Menu_Tune_Table.
808D LD A,C Fetch the current game options.
808E AND %00000110 Keep only the control method bits.
8090 LD L,A Create an offset in HL.
8091 LD H,$00
8093 ADD HL,DE Point HL at the matching entry in Menu_Tune_Table.
8094 LD E,(HL) Fetch the control-method jingle address.
8095 INC HL
8096 LD D,(HL)
8097 CALL QueueTune Queue the control-method jingle.
Flash the selected 1UP/ 2UP and control-method lines.
Game_Restart_FlashSelection 809A LD HL,$810F HL=GameSelection_Attributes_Options (the first selectable line, skipping the title).
809D LD A,($5E00) Copy the current game options into C.
80A0 LD C,A
80A1 BIT 0,C Jump to Game_Restart_Flash2UP if this is a 2UP game.
80A3 JR NZ,Game_Restart_Flash2UP
80A5 CALL MenuAttributeSetUnset Call MenuAttributeSetUnset.
Flash the line for the selected control method and clear the other two.
MenuAttributeHandler 80A8 LD B,$03 Set a control method counter in B for 03 loops.
80AA LD A,C Fetch the options and move the control bits into bits 0-1.
80AB RRCA
MenuAttributeHandler_Loop 80AC AND %00000011 Keep only bits 0-1.
80AE JR Z,Game_Restart_FlashControlMethod Jump to Game_Restart_FlashControlMethod if this control method is selected.
80B0 CALL MenuAttributeUnSetFirst Call MenuAttributeUnSetFirst.
GameSelect_ReadOptions 80B3 DEC A Decrease the method bits and loop back to MenuAttributeHandler_Loop until all three lines are updated.
80B4 DJNZ MenuAttributeHandler_Loop
80B6 JP GameSelect_Loop Jump to GameSelect_Loop.
Flash the selected control-method line.
Game_Restart_FlashControlMethod 80B9 CALL MenuAttributeSetFirst Call MenuAttributeSetFirst.
80BC JR GameSelect_ReadOptions Jump to GameSelect_ReadOptions.
Flash the 2UP line, then handle the control methods.
Game_Restart_Flash2UP 80BE CALL MenuAttributeUnsetSet Call MenuAttributeUnsetSet.
80C1 JR MenuAttributeHandler Jump to MenuAttributeHandler.
Flash this menu line and clear FLASH on the next.
MenuAttributeSetUnset 80C3 SET 7,(HL) Set the FLASH attribute for this menu line.
80C5 INC HL Move onto the next menu attribute.
MenuAttributeUnSetFirst 80C6 RES 7,(HL) Clear the FLASH attribute for this menu line.
80C8 INC HL Move onto the next menu attribute.
80C9 RET Return.
Clear FLASH on this menu line and set it on the next.
MenuAttributeUnsetSet 80CA RES 7,(HL) Clear the FLASH attribute for this menu line.
80CC INC HL Move onto the next menu attribute.
MenuAttributeSetFirst 80CD SET 7,(HL) Set the FLASH attribute for this menu line.
80CF INC HL Move onto the next menu attribute.
80D0 RET Return.
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