Bug in Bob Supnik's Emulator!

[Pete Turnbull]

On Apr 3, 17:26, Greg Lehey wrote:
> On 2 April 1998 at 23:50:23 -0800, Steven M. Schultz wrote:

> > 	Not having any great need of an emulated PDP-11 I've not pursued
> > 	the (suspected) bug in Bob Supnik's emulator.  Even on a PentiumPro
> > 	an emulated 11 is slower than a real 11/73 (and a lot slower than an
> > 	11/93 - which I should cease neglecting and stuff a SCSI card into
> > 	some day as I did with the 11/73).
>
> Interesting.  I was running this on an AMD K6/233, which should be
> slower than a PPro, and I had the impression it was faster.  Does
> anybody have some benchmarks?

I don't have numbers for anything running under the emulator, but I do have
Dhrystone sources (and some figures for real PDP-11s of various sorts with
various operating systems and compilers).  If anyone wants to try it, I can
post the source.

-- 

Pete						Peter Turnbull
						Dept. of Computer Science
						University of York

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