Jerome H. Fine wrote: > >Holm Tiffe wrote: > > >>Ben Sinclair wrote: > > > >>I was just looking up VAXstations the other day on eBay. I checked > >>again now for 4000's, and the prices seem crazy. Is there something > >>particularly special about them, or is it just the usual eBay > >>craziness? > >> > >..that are the smallest and fastest VAXen so it is not so unlikely > >that the prices are crazy... > > > >Why you don't use an simulator (E11, simh) for the job? > > > That sounds like a good idea to use SimH for the VAXstation. However, > I suspect that E11 (Ersatz-11) would be a bit difficult to use to emulate a > VAXstation since E11 is exclusively for the PDP-11. > > As for the individual who mentioned the speed of an emulator, I have used > both SimH and Ersatz-11 on a 750 MHz Pentium III. SimH probably runs > at about the speed of a PDP-11/93, probably even faster. However, Ersatz-11 > runs 15 times as fast for CPU speed and about 100 times as fast for hard > disk I/O. > On a 2.83 GHz Q9550, Ersatz-11 ran about 100 times the speed of a PDP-11/93 > for the CPU and hard disk I/O was probably about 200 times as fast. As just > one example, on a real DEC PDP-11/93 with ESDI hard drives, it took about > 4 minutes to copy about 32 MB from one physical hard drive to a different > physical hard drive. On the Q9550, it took less than 1 second. I was using > RT-11 in all cases. I would assume that an I7 CPU would be somewhat faster, > but maybe someone else has some benchmarks. > > Jerome Fine
Yes. Jerome he is right, he ist not intrrested in your great numbers since hi want to emulate not a PDP11, but a VAX. Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Straße 42, 09600 Oberschöna, USt-Id: DE253710583 www.tsht.de, i...@tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741