RT-11 legal restrictions exist...
RSX-11 No idea, but I'd expect licensing again
RSTS Licensing again?
They're all covered by licenses. And are available for hobbyists,
but again, only for use with the Supnik emulator. So, as you said,
that doesn't help people with real iron.
Unix... AVAILABLE via PUPs support group as free
binaries and 100$
license for sources. Initially this seems good but not all PDP-11
configurations can run unix and not all versions of Unix have the
drivers to interact with some PDP-11 hardware. So it may take a lot
of work with limited tools or none to get it going.
V5, V6 and V6 are available from the same site as the Supnik
emulators, and I don't believe the licenses accompanying them
are as strict... and yes, the license for them is only $100.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work):
gentry!zk3.dec.com |
| Unix Support Engineering Group | (home):
mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL:
http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+