This is zipcode, a C64 whole disk packer/unpacker (without much in the way of compression,) which is needed to create the Expose' magazine disk (and other things.) Oddly enough, I couldn't find this program on cco, so here it is. One note about the program: if you only have a single drive, be sure to set the destination drive number before starting; else it dies not realizing that you don't have a drive 9.