Ron Hudson wrote: RT11 version 5.3 on RL02 packs. Essentially, it is a single user OS for the PDP-11, originally designed for real time work (that's where the RT comes from). You should just have to unzip/untar/whatever, point the emulator at the disk image (as an RL02 drive), and boot.

Jerome Fine replies: Since both SIMH and Ersatz-11 work under W95/W98, I can't see why SIMH will not work under DOS will not handle SIMH as well as E11. Please try again. As far as I know, both SIMH and E11 run any PDP-11 operating system. For myself, I have used ONLY RT-11, but both SIMH and E11 run very well. Normally, a DSK type file is fully expanded. If you have a file which is 10 MBytes (20450 blocks of 512 bytes each), then it is almost certain you have a copy of an RL02 distribution for V5.03 of RT-11. Under E11, the commands: MOUNT DL0: rtv53_rl.dsk/RL02/RONLY BOOT DL0: should get you started. The compressed file which contains the V5.03 of RT-11 distribution for an RL02 media is 1,373,083 bytes. you need to UnZip this file which I have heard produces 3 files. RT-11 was probably the first major operating system for the PDP-11 and was first released in the early 1970s. V5.06 was released by DEC in August 1992 and was partially made Y2K. V5.07 was released by Mentec in November 1998. Let us know how you made out. Any other questions? Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.