If you want to build the demo: python wlenc.py logo.bin logo.bin.wle 165 python xmconv.py music.xm music.bin 64tass -C -a -b -o main.o main.asm python wlenc.py main.o main.o.wle 64tass -C -a -o demo.prg init.asm If you want to build the standalone music player: python xmconv.py music.xm music.bin 64tass -C -a -D STANDALONE=1 -o pettan.prg player.asm (sorry for no make or shell script this time)