given on command line. 64tass src.asm There are also some useful parameters which are described later. For comfortable compiling I use such Makefile s (for make ): demo.prg: source.asm makros.asm pic.drp music.bin 64tass -C -a -B -i source.asm -o demo.tmp pucrunch -ffast -x 2048 demo.tmp >demo.prg This way demo.prg is recreated