<The UCSD p system used a nonstandard disk format technique, the floppy <was formatted in "blocks" and you booted the systeem off the a drive. <It wasn't just a language, but an entire operating system/environment. <I still have a copy of it around here somewhere from a class I took in <the early 80's. This was largely true for the z80based and PDP-11 based versions as well. I still have the P-system for horizon single density. The language addressed "units" as devices. The standard ones: unit volume -------------- 1 console: 2 systerm: 3 graphic: 4 <volume name> system disk 5 <volume name> alternate disk 6 printer 8 REMOTE: system peripherals 9-12 <VOLUME NAME> ADDITIONAL DRIVES Now if the code for the system interface didn't go beyond 2 floppy devices your cooked as that was a p-system hard coded thing. Allison