1 Feb
2013
1 Feb
'13
10:17 a.m.
On Feb 1, 2013, at 12:00 PM, cctalk-request at classiccmp.org wrote:
From: Pete Turnbull <pete at
dunnington.plus.com>
To: General Discussion: On-Topic and Off-Topic Posts
<cctalk at classiccmp.org>
Subject: Re:
Message-ID: <510AD86B.8020007 at dunnington.plus.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 31/01/2013 05:37, Charles wrote:
The original ones (-339, -340) are 2716 EPROMs (2k). The only jumper
changed was the J23-24 which the manual says to set for 8K proms, and
J23-22 for 2k.
I put the old ones back in (and set the jumper accordingly) and the
transfer proceeded normally. For whatever reason the new ones do not
like VTserver.
Incidentally, the problem with the 8/A & RL02 turned out to be simply
a bad ribbon cable connection (my fault) where the IDC connector plugs
into the RL8A card.
The previous OS/8 pack boots and runs normally too... now I can get
back to playing Lunar Lander in FOCAL on the Teletype, and ADVENT :)
-Charles
Anyhow, I figure that the OS/8 pack might have
become corrupted, so I
attempted to reload it on my 11/23+ system (which IS working and
passing
memory tests) using VTserver, which is how I created it the first
time.
However, since I last successfully did it, I've upgraded the 11/23+
boot
ROMs to the KDF11B-BH V1.0. This is the only hardware change. Not
sure
if that has anything to do with the problem
Do I need to go back to the original boot ROM in
order to use
VTserver
(i.e. is there some change made to ODT that is messing things up?)
The boot ROMs have no bearing on ODT, which is in the microcode in the
KDF11 itself. So you can eliminate at least one area of concern.
What
boot ROMs did you have before? Were they 2K ones (11/23+) or 8K ones
(microPDP-11/23)? Have you changed any jumpers during the upgrade?
--
Pete