2023-10-20 16:09:06 +00:00
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IF !DEF(STATE_TITLE_ASM)
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DEF STATE_TITLE_ASM EQU 1
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INCLUDE "globals.asm"
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SECTION "Title Functions", ROM0
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SwitchToTitle::
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; Turn the screen off if it's on.
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ldh a, [rLCDC]
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and LCDCF_ON
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jr z, :+ ; Screen is already off.
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wait_vram
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xor a, a
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ldh [rLCDC], a
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; Load the gameplay tilemap.
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: ld de, TitleScreenTilemap
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ld hl, $9800
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ld bc, TitleScreenTilemapEnd - TitleScreenTilemap
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call UnsafeMemCopy
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; Clear OAM.
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call ClearOAM
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call SetNumberSpritePositions
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; Set up the palettes.
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ld a, PALETTE_INVERTED
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set_bg_palette
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set_obj0_palette
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set_obj1_palette
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; Install the event loop handlers.
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ld a, 0
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ldh [hGameState], a
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; And turn the LCD back on before we start.
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ld a, LCDCF_ON | LCDCF_BGON | LCDCF_BLK01
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ldh [rLCDC], a
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; Make sure the first game loop starts just like all the future ones.
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wait_vblank
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wait_vblank_end
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ret
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TitleEventLoopHandler::
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ldh a, [hStartState]
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ld b, a
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ldh a, [hAState]
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ld c, a
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ldh a, [hBState]
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or a, b
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or a, c
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2023-10-20 16:47:41 +00:00
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cp a, 1
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jp nz, EventLoopPostHandler
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2023-10-20 16:09:06 +00:00
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call SwitchToGameplay
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jp EventLoopPostHandler
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ENDC
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