Update start script

src/bootloader.asm

@@ -51,5 +51,5 @@ times 510-($-$$) db 0
 db 0x55, 0xaa ; magic BIOS numbers
 
 ; Bloat bytes to test reading
-times 128 dw 0xe, 0xf
+times 256 dw 0xe
 times 256 dw 0xa

start.sh

@@ -1,2 +1,13 @@
 #!/usr/bin/bash
-qemu-system-x86_64 bin/bootloader.bin
+
+bootloader=bin/bootloader.bin
+
+start_bootloader() {
+	qemu-system-x86_64 $bootloader
+}
+
+if test -f "$PWD/$bootloader" then
+	start_bootloader
+else
+	/usr/bin/bash $PWD/compile.sh && start_bootloader
+fi