Roy asked: <snip> >How, if at all, is the 9918a different for the assembly language >programer, from the 9928 chip? I can email you the .pdf of the datasheet for the chip family if you want--it's 5.7MB, though. (You know how the old datasheets are all just scanned pages... ;-) -michael Check out amazing quality sound for 8-bit Apples on my Home page: http://members.aol.com/MJMahon/