1 files changed, 29 insertions, 0 deletions
diff --git a/hello.c b/hello.c
new file mode 100644
index 0000000..cc26bf3
--- /dev/null
+++ b/hello.c
@@ -0,0 +1,29 @@
+/* http://www.loirak.com/gameboy/gbatutor.php
+ * hello.c - Gameboy Advance Tutorial - Loirak Development
+ */
+#define RGB16(r,g,b)  ((r)+(g<<5)+(b<<10))
+
+void start(void)
+{
+	char x,y;
+	unsigned short* Screen = (unsigned short*)0x6000000;
+	*(unsigned long*)0x4000000 = 0x403; // mode3, bg2 on
+
+	// clear screen, and draw a blue back ground
+	for(x = 0; x<240;x++)   //loop through all x
+	{
+		for(y = 0; y<160; y++)  //loop through all y
+		{
+			Screen[x+y*240] = RGB16(0,0,31);
+		}
+	}
+
+	// draw a white HI on the background
+	for(x = 20; x<=60; x+=15)
+		for(y = 30; y<50; y++)
+			Screen[x+y*240] = RGB16(31,31,31);
+	for (x = 20; x < 35; x++)
+		Screen[x+40*240] = RGB16(31,31,31);
+
+	while(1){}	//loop forever
+}