Hi, Ed.
I've had a chance to do some further research on
this, and it seems
to me that the bug is definitely in Supnik's emulator. What do you
all think? Am I onto something? If so, what part of Supnik's code
is probably to blame?
Interesting... did you use the same binary on both Bob's emulator and Ersatz?
3. Peter Turnbull wrote me that factor running on
under uv7 on his
PDP-11/23 runs the test case 'factor 6' without error.
Ah, I meant to mail that to the list. No matter, it got to where it was most
needed, obviously :-)
I'd suggest you recompile factor if you have the source, but add some
debugging. If you can't do that, you could try running it with adb (the
debugger, man 1 adb for details).
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
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From: Warren Toomey <wkt(a)henry.cs.adfa.oz.au>
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Subject: Re: Bug in Bob Supnik's Emulator!
To: pete(a)dunnington.u-net.com
Date: Sat, 28 Mar 1998 11:50:54 +1100 (EST)
Cc: edgee(a)cyberpass.net, pups(a)minnie.cs.adfa.oz.au
In-Reply-To: <9803270628.ZM27283(a)indy.dunnington.york.ac.uk> from Pete Turnbull at
"Mar 27, 98 06:28:52 am"
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In article by Pete Turnbull:
Hi, Ed.
I've had a chance to do some further
research on this, and it seems
to me that the bug is definitely in Supnik's emulator. What do you
all think? Am I onto something? If so, what part of Supnik's code
is probably to blame?
Interesting... did you use the same binary on both Bob's emulator and Ersatz?
> 3. Peter Turnbull wrote me that factor running on under uv7 on his
> PDP-11/23 runs the test case 'factor 6' without error.
I'd suggest you recompile factor if you have the
source, but add some
debugging. If you can't do that, you could try running it with adb (the
debugger, man 1 adb for details).
I suspect the FP emulation in Bob's Emulator, so it might be worth
watching the floating point values in the program. Bob mailed me during
the week, and I sent him a virgin binary of factor so he could verify that
there is a bug.
Warren
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The PUPS mailing list seems to be getting busier. For those `lurkers' who
want to follow the list, but don't want to be pestered by incoming email
every 10 minutes, I've set up a digest form of the list.
The digest will be sent out every Monday and Thursday, or if the incoming
e-mail exceeds 40K in total.
To get the digest version, and to unsubscribe from the normal list, send
e-mail to majordomo(a)minnie.cs.adfa.oz.au with the commands in the message body:
subscribe pups-digest
unsubscribe pups
You still need to send mail to pups(a)minnie.cs.adfa.oz.au for it to go to
the PUPS list and to be included in the digest.
Warren