21 Oct
2005
21 Oct
'05
4:43 a.m.
Subject: Re: RL01 drive select plug and power supply questions
From: Johnny Billquist <bqt at Update.UU.SE>
Date: Fri, 21 Oct 2005 13:16:33 +0200 (CEST)
To: cctalk at classiccmp.org
On Thu, 20 Oct 2005, Allison <ajp166 at bellatlantic.net> wrote:
I think I'll slightly disagree with you here.
While all you say is essentially true, the DLV11 is a tremendour burden on
the system compared to the DHV11. So if you actually want to run serial
connections to a machine, keep the DHV11, and don't use the console more
than absolutely neccesary.
Big difference between DMA and interrupts you know...
Yes I do. However for a single user system the load is not an issue.
If your running a timeshare system such as RSTS or RSX with more than one
user then DHV11 sense as well.
For most of my 11s four lines is the limit for what I can seem to keep busy.
Figure a user terminal, LA100 Printer and serial line for modem or data
line to another system. At the extreme I've run two terminals for OSs
that support that but, I can only type on on at any instant. ;)
Allison
Subject:
Re: RL01 drive select plug and power supply questions
From: David Betz <dbetz at xlisper.mv.com>
Date: Thu, 20 Oct 2005 18:26:02 -0400
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Thanks for your reply. I guess I'm okay with power even if I leave in
the DHV11 as it seems my BA11-N has been upgraded to a H7861 power
Unless you need the IO I'd pull it anyway. The system will run cooler
and I doubt you have need for the lines. DHV11 is a MUX and you need
the chassis kit to break out all the serial lines. Most OSs for PDP11
don't use it (system build time option) and the DLV11J is easier to use
and program. The DHV11 cannot be used for a console either.