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Thanks or persisting. Now I see what you mean. This is great. I had
no idea that interactive examine could be used this way. So,
basically ie -m examines the memory that you specify and allows you
to change it, with assembly language instruction mnemonics no less,
who'd of thunk it!<br>
<br>
id -m works too:<br>
sim> id -m 0-16<br>
0: inc 177560<br>
4: tstb 177560<br>
10: bpl 4<br>
12: movb 177562,r0<br>
16: halt<br>
sim> g 0<br>
<br>
HALT instruction, PC: 000020 (HALT)<br>
sim> <br>
<br>
SimH is a pretty amazing tool. It works great as a debugger, too.<br>
<br>
Thanks,<br>
<br>
Will<br>
<br>
<div class="moz-cite-prefix">On 2/20/16 3:43 PM, Kevin Handy wrote:<br>
</div>
<blockquote
cite="mid:CANk4W2M7ybjcNWnSwKHh-kFUtusnxM1GAsbDcwB6msBS7KWWdw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>You also have the option of running on the "bare" metal
of the simh emulator.<br>
<br>
PDP-11 simulator V3.8-1<br>
sim> ie -m 0-16<br>
0: HALT inc 177560<br>
4: HALT tstb 177560<br>
10: HALT bpl 4<br>
12: HALT movb 177562,r0<br>
16: HALT halt<br>
sim> run 0<br>
<br>
HALT instruction, PC: 000020 (HALT)<br>
sim> <br>
<br>
</div>
Used halt instead of ,exit because not macro library here.<br>
<br>
</div>
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.<br>
<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Feb 20, 2016 at 10:48 AM, Paul
Koning <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:paulkoning@comcast.net" target="_blank">paulkoning@comcast.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><span
class=""><br>
> On Feb 20, 2016, at 12:25 PM, Will Senn <<a
moz-do-not-send="true" href="mailto:will.senn@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:will.senn@gmail.com">will.senn@gmail.com</a></a>>
wrote:<br>
><br>
> 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 :)!<br>
<br>
</span>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.<br>
<br>
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.<br>
<span class="HOEnZb"><font color="#888888"><br>
paul<br>
</font></span>
<div class="HOEnZb">
<div class="h5"><br>
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</blockquote>
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</blockquote>
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