[Simh] Reading directly from console in RT-11

[Kevin Handy]

You also have the option of running on the "bare" metal of the simh
emulator.

PDP-11 simulator V3.8-1
sim> ie -m 0-16
0:    HALT    inc 177560
4:    HALT    tstb 177560
10:    HALT    bpl 4
12:    HALT    movb 177562,r0
16:    HALT    halt
sim> run 0

HALT instruction, PC: 000020 (HALT)
sim>

Used halt instead of ,exit because not macro library here.

You also have "macro11" in simtools to assemble things. Don't know if there
is any way to feed its output directlt into simh though.


On Sat, Feb 20, 2016 at 10:48 AM, Paul Koning <paulkoning at comcast.net>
wrote:

>
> > On Feb 20, 2016, at 12:25 PM, Will Senn <will.senn at gmail.com> wrote:
> >
> > Great answer and helpful. I'll give both approaches a shot. If I
> understand my environment correctly, RT-11 is single user, single job
> (well, most of the time anyway). So, it oughta be safe enough to try this
> without messing things up beyond needing to restart if I have logic errors?
> That is, the file system isn't involved or caching or anything that would
> cause inconsistency as a result of an infinite loop or crash? Not that I
> would ever code such things :)!
>
> RT comes in several flavors, of which I know the SJ and FB
> (foreground/background) flavors, V2 specifically.  Both are unprotected
> operating systems, so you can play with I/O devices at will.
>
> Also, in those there definitely is no caching in the file system.  For
> that matter, the file structure is simple enough that there really isn't
> anything to go "inconsistent".  A crash in mid-operation might cause a file
> not to be there if it was being written, but that's about it.  The only
> exception I can think of is the file system defrag operation, but then
> again that one may be written in a fault tolerant manner, I don't know.
>
>         paul
>
>
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