.DB $01, $02, $04, $08, $10, $20, $40, $80

.PADTO 0x0040
VBlank:
	JP =VBLANK_Entrypoint

.PADTO 0x0048
STAT:
	JP =STAT_Entrypoint

.PADTO 0x0100
Start:
	JP =Initialize_RAM

.PADTO 0x0104
Nintendo_Logo: ; The Nintendo logo must be stored in bytes 0x104-133
	.DB $CE,$ED,$66,$66,$CC,$0D,$00,$0B,$03,$73,$00,$83,$00,$0C,$00,$0D 
	.DB $00,$08,$11,$1F,$88,$89,$00,$0E,$DC,$CC,$6E,$E6,$DD,$DD,$D9,$99 
	.DB $BB,$BB,$67,$63,$6E,$0E,$EC,$CC,$DD,$DC,$99,$9F,$BB,$B9,$33,$3E 
	
.PADTO 0x0134
Checksum: ; The bytes 0x134-0x14d need to add up to 0xe7 (= 0xff - 0x19)
	.DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
	.DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$e7

Initialize_RAM:
; Disable Interrupts
LD A, $00
LD $reg_interrupt_enable, A
Empty_WRAM:
	LD HL, $C000
	Empty_WRAM.loop:
		XOR A
		LD (HL+), A
		LD A, $D0
		CP H
		JR NZ, =Empty_WRAM.loop

	CALL =VBlank_Wait

	; LCDC
	XOR A
	LD $reg_lcd_controller, A

Empty_VRAM: ; (Clear screen)
	LD HL, $VRAM_start ; We set the HL register to the start of VRAM
	Empty_VRAM.loop:
		XOR A
		LD (HL+), A 						; We set the memory pointed to by HL to 0 and increase HL
		LD A, $a0
		CP H        						; Until h has reached $a0 ($a0000 is the end of VRAM)
		JR NZ, =Empty_VRAM.loop

	; BG Palette
	LD A, $e4
	LD $reg_bg_palette, A
	
	; OBJ0 Palette
	LD A, $d3 ; $e4
	LD $reg_obj0_palette, A
	
Initialize_Window_GUI:
	LD HL, $9c20
	Initialize_Window_GUI.top_bar_loop:
		LD A, $10
		LD (HL+), A

		LD A, L
		CP $40
		LD $reg_lcd_status, A
		JR NZ, =Initialize_Window_GUI.top_bar_loop

	LD HL, $9da0
	LD BC, $00a0
	LD DE, =Dialogue_Box_Tilemap_data
	CALL =memcpy

Copy_OAM_DMA_Transfer_Routine_To_HRAM:
	LD HL, $OAM_DMA_Transfer_routine
	LD DE, =OAM_DMA_Transfer_routine_src
	LD BC, $000a
	CALL =memcpy

	JP =Entrypoint

OAM_DMA_Transfer_routine_src:
	LD A, $mem_oam_buffer_high
	LD ($46), A
	LD A, $28        ; delay for a total of 4×40 = 160 M-cycles
	OAM_DMA_Transfer_routine_src.wait:
	    DEC A						             ; 1 M-cycle
	    JR NZ, =OAM_DMA_Transfer_routine_src.wait    ; 3 M-cycles
	    RET
	OAM_DMA_Transfer_routine_src.end: