Portable PDP-11 (was Re: Does anyone use RT-11?)
ethan.dicks at gmail.com
Mon Sep 10 12:43:52 CDT 2007
On 9/10/07, e.stiebler <emu at e-bbes.com> wrote:
> Ethan Dicks wrote:
> > Back to the T-11, though, if I recall its capabilities correctly, it
> > doesn't have an MMU, and it would be difficult, if not impractical, to
> > design an external one that resembles, say, the MMU on an 11/23... so
> > that means RT-11SJ monitor only, correct? (or would FB be possible?)
> > There's lots of software out there that runs in 56K or less, so I
> > don't see that as a fatal flaw.
> Why not just use the J-11, and have it all ?
I would think that for one thing, T-11 chips are much easier to find
than J-11 chips - DEC used the T-11 in a variety of peripheral cards
and terminals, and such. I personally probably have half-a-dozen T-11
chips, and two J-11 chips (one Pro380 and one KDJ11 board).
If course, if a project were to erupt that was some form of portable
J-11 design w/1MB or more of SRAM and some local mass storage, I would
certainly strongly consider building one, even if I had to borrow a
J-11 chip from one of my two sources.
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