ISO: PDP-11/40 LTC and Stack Limit options
billdegnan at gmail.com
Mon Nov 21 16:44:24 CST 2016
On Mon, Nov 21, 2016 at 4:58 PM, Jerry Weiss <jsw at ieee.org> wrote:
> > On Nov 21, 2016, at 2:13 PM, william degnan <billdegnan at gmail.com>
> > On Mon, Nov 21, 2016 at 2:37 PM, Josh Dersch <derschjo at gmail.com> wrote:
> >> Hi all --
> >> I'm finally turning my attention back to my 11/40 (which I started
> >> on 7 years ago and never quite got around to finishing -- I've learned a
> >> lot since then and I'm hoping to be able to debug it properly now).
> >> My ultimate goal is to run V6 or V7 UNIX on it -- I have the MMU but I'm
> >> looking for an M787 (line-time clock) and M7237 (stack limit register)
> >> complete the set. I have other DEC stuff for trade, drop me a line...
> >> Thanks!
> >> Josh
> > Just curious, are you aware whether these two are required to boot a RL02
> > disk or certain versions of RT-11? I have been experiencing
> > I only have the m737 iinstalled in my system.
> > Bill
> RT11 will run w/o an LTC.
> TTBOMR the stack limit register is not need for Single Job and the
> other RT11 OS variants. However a program could overwrite the vector area
> and cause an ungraceful shutdown. Make sure the jumpers on the KD11-A
> are set
> correctly for this configuration.
> Using an RL02 to boot RT11 should be okay as well.
> jsw at ieee.org
Not exactly what TTBOMR is but I can say that given zero luck booting RT-11
from an RL02 on my 11/40 my next move is to emulate a TU58 drive on a 2nd
serial card and run XXDP. I can run BASIC with no problem, but it seems
like my known working (elsewhere) M7762 RT11 controller card does not wake
up when called by the bootstrap 9312 ROM, etc.
More information about the cctech