>The Professional 350 uses a PDP11 CPU (F11 or J11 depending on the
>machine). It runs P/OS (== cut-down RSX with a menu shell on top) or
>Venix. Oh, I think RT11 as well.
The PRO-350 used the F11 (Fonz) chip (same as in an 11/23). The
PRO-380 used the J11 (Jaws) chip (same as an 11/73).
Oh yeah - and RT-11 sure does run on them! We got it working on
the PRO back in 1980... You should have seen some of the things
we had to do to get it running, though...
Some PRO strangeness - it has a 64hz clock... so, for RT-11 to
emulate a 60hz clock, it counts 15 clock ticks and throws one
away... :-)
The PRO-380 doesn't have cache, but if you *turn off* the non-existent
cache (using the cache control register), the machine slows down to
11/23 speed!
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 '_at_' 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 |
+--------------------------------+-------------------------------------+
Received on Thu Oct 01 1998 - 22:26:29 BST