< Is there a user group or something akin that I could contact to purchas < RT-11 on 8" floppy? When I flip the "boot" switch, it accesses drive "0 < so I assume it's looking for the OS. The @ is the ODT prompt. If you type a / that prints the contents of the current address and if you enter a number it will replace it. @$n (n=0 to 7) prints a regiters contents and can alter it. @1773000G Start executing at 773000 (octal!) That address is commonly the address of rom bootstraps. RT-11 is available on the net at... ftp://gatekeeper.dec.com/pub/digital/sim/software/rtv53swre.tar.Z That is a unix gziped tar file of RT-11 V5.3. If you find it on media you are permitted to use it as a hobbiest. Allison