scroll out nintendo logo

Code/main.asm

@@ -24,10 +24,10 @@ Start:
 	xor a
 	ldh [rIF], a
 
-	; wait for v-blank
-	halt 
+	call ScrollNintendoOut
 	
 	; disable screen
+	halt
 	xor a
 	ld [rLCDC], a
 

Code/nintendo-out.asm

@@ -0,0 +1,26 @@
+INCLUDE "hardware.inc"
+
+SECTION "NintendoLogo", ROM0
+
+EXPORT ScrollNintendoOut
+SECTION "Scroll Nintendo Out", ROM0
+ScrollNintendoOut:
+	ld b, 30
+.wait
+	halt
+	xor a
+	ld [rIF], a
+	dec b
+	jr nz, .wait
+
+.scrollup
+	halt
+	xor a
+	ld [rIF], a
+	ldh a, [rSCY]
+	inc a
+	ldh [rSCY], a
+	cp a, 88
+	jp nz, .scrollup
+	
+	ret

build.bat

@@ -1,7 +1,8 @@
-..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\main.o     Code\main.asm
-..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\data.o     Code\data.asm
-..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\automata.o Code\automata.asm
-..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\render.o   Code\render.asm
-..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\utils.o    Code\utils.asm
-..\..\Assembler\rgblink -n rom.sym -w -t -o rom.gb -d Build/main.o Build/data.o Build/automata.o Build/render.o Build/utils.o
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\main.o         Code\main.asm
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\data.o         Code\data.asm
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\automata.o     Code\automata.asm
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\render.o       Code\render.asm
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\utils.o        Code\utils.asm
+..\..\Assembler\rgbasm -i ..\..\Include\ -i Graphics\ -i Code\ -o Build\nintendo-out.o Code\nintendo-out.asm
+..\..\Assembler\rgblink -n rom.sym -w -t -o rom.gb -d Build/main.o Build/data.o Build/automata.o Build/render.o Build/utils.o Build/nintendo-out.o
 ..\..\Assembler\rgbfix -t "Game of Life" -v -p 0 rom.gb