" if I want to save a back-up of a program before I make changes can I only do it as a .DO"
Natively, yes. You can rename the program, but there is no way to copy it without loading some special program to do it, or save/load from external. So to duplicate a file with a stock machine you'd need to save as a DO, LOAD" it, then save it as a new file name. Which means you have to have enough space for the original, the tokenized program + ASCII format. Then you can delete the ASCII file and have just the two tokenized copies. If you simply need to take backups of RAM on occasion and you have a serial cable and a PC you can consider my utility TBACK.EXE . It can backup/restored the full RAM in about 9 seconds -- John. >
