Buddy 64/128 Development System actually encompasses three stand-alone machine language development systems. There are two for writing 8500 (the system microprocessor) code : One uses the Basic editor (enhanced by string search and replace commands) for writing its memory based source and the other its own powerful ASCII editor . There is also a complete Z/80 ( C/PM microprocessor) cross assembler which has all the powerful commands and features of the other two. As a bonus there is also an assembler completely compatible with Pro-Line's C-POWER shell, editor, linker and ramdisk.