25 Mar
2009
25 Mar
'09
4:01 a.m.
8600: 4.2 VUP
785: 1.7 VUP
780: 1.0 VUP*
MVII: .9 VUP
750: .6 VUP
PDP11/70: .6 VUP
uPDP11/73: .45 VUP
MVI: .35 VUP
730: .3 VUP
uPDP11/23: .15 VUP
\philst
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf
Of Ethan Dicks
Sent: Tuesday, March 24, 2009 11:46 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Looking for early versions of MicroVMS & VWS
On Wed, Mar 25, 2009 at 12:09 AM, Zane H. Healy <healyzh at aracnet.com> wrote:
At 4:15 PM -0400 3/24/09, Paul Koning wrote:
I never got to play with an 11/73 back in the day (we stopped buying PDP-11 gear around
the days of the F-11 chip), but I would not be shocked to learn that the J-11 is twice as
fast as a MicroVAX-I. It really is dog slow. It's a good thing the MicroVAX-II was
much, much faster or DEC would have been in trouble long before they eventually got into
trouble.
-ethan
RSTS on an 11/73 driving an TU50 would stream quite well (with
Backup). ?Is a MicroVAX-I slower than that? ?Or does RSTS do
streaming I/O better than VMS? ?(I suppose that's possible...) ?
Interrupt latency shouldn't be much of an issue; the thing is that
you have to queue up multiple buffers.
Isn't the PDP-11/73 about twice as fast as a MicroVAX I? ?Remember the
MicroVAX I is only 0.3 VUPS.