Subj : Re: what's classic now?
To   : Stan Hosdar
From : Jeff Thiele
Date : Thu Jul 01 2021 08:37 am

On 30 Jun 2021, Stan Hosdar said the following...
 SH> JT> need an OS, such as RSX-11
 SH> what OS did a pdp-11 run? in particular what OS did cpm (and dos, etc)
 SH> emulate with it's .com, .exe and other similar command lines?

I don't know that the extensions are going to match up quite the same
(especially since the difference between a .COM and a .EXE has to do with the
8086's segmented memory architecture, which the PDP-11 did not have).

However, there were may OSs available for the PDP-11. RSX-11 is CP/M-like,
the most notable shared command being PIP.

The PiDP-11 comes with a bunch of operating systems already set up (see
https://obsolescence.wixsite.com/obsolescence/pidp-11-building-instructions
in the "Prepare your Pi" section). It has disk images and configuration for
several OSs. I think after you unzip the archive, the are in the systems/
folder.

The PiDP-11 allows selection of an OS at boot-time via particular combinations
of panel switches, and uses a customized version of SIMH to interact with the
front panel. However, it all works without the front panel, too.

Jeff.

"For every complex problem there is an answer that is clear, simple, and
wrong." -- H. L. Mencken, who indeed was a racist thereby proving himself
right.
--- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32)
 * Origin: Cold War Computing BBS (1:387/26)

.