2 Aug
2009
2 Aug
'09
2:22 a.m.
One can't really tell much without opening the back panel,
but I will make a guess based on the photos provided in the auction
listing,
and typical system configurations from the period.
It would appear that this is a PDP-11/23+ system.
This is based on the basic "Micro PDP-11" medallion on the front panel,
and the 2-port cab-kit, which is standard for the 11/23+ only.
(11/53's, 11/73's, and 11/83's have single-port cabinet kits.)
I see two 4-port cab-kits on there, which, based on the era
is most likely a DHV11, but it could be a pair of DZV11's as well.
There is a lone connector in one of the "A" slots,
which could be just about anything. It sort of looks like
the LPV11 cabinet kit with the 37-pin connector,
but that is just speculation.
The RX50's tell you that there should be an RQDXn controller
installed (most likely an RQDX2) which might also indicate
the presence of an RD52 or RD53 disk drive behind the front bezel.
It probably has an MSV11-P memory card installed, for 512K of ram.
The BA23 chassis looks to be the newer style,
with black buttons on the front panel. Hopefully
this indicates an upgraded power supply harness.
Again, these are just the "most probable"; someone
could have done some upgrades, but without a peek
behind the panel or more information from the e-bay poster,
it will be impossible to say for certain.
T
2 Aug
2 Aug
5:25 a.m.
On 02/08/2009 10:22, tiggerlasv at aim.com wrote:
One can't really tell much without opening the back panel,
but I will make a guess based on the photos provided in the auction
listing,
and typical system configurations from the period.
It would appear that this is a PDP-11/23+ system.
You mean a "microPDP-11/23". A PDP-11/23plus would be in a BA11-S box.
Same processor board, though, but very different boot ROMs.
This is based on the basic "Micro PDP-11"
medallion on the front panel,
and the 2-port cab-kit, which is standard for the 11/23+ only.
The badge could be any of the microPDP-11 series, as far as I can see.
But it is a 2-port cab kit -- well spotted (on single-port ones the baud
rate legend and selector are in the middle, with the DB25 at one end and
the LED displays at the other) so unless it's been upgraded this is a
KDF11 system, not a KDJ11.
I see two 4-port cab-kits on there, which, based on
the era
is most likely a DHV11, but it could be a pair of DZV11's as well.
Could even be a couple of DLV11-Js, though that's less likely.
There is a lone connector in one of the "A"
slots,
which could be just about anything. It sort of looks like
the LPV11 cabinet kit with the 37-pin connector,
but that is just speculation.
Could be; I thought about a DLV11-E or a DPV11, but the connector looks
too big for those. Maybe a TQK25 kit, I can't remember what the
connector on those was.
The RX50's tell you that there should be an RQDXn
controller
installed (most likely an RQDX2) which might also indicate
the presence of an RD52 or RD53 disk drive behind the front bezel.
If it were an 11/23 variant it would much more likely be an RQDX1, but
that's very similar.
--
Pete Peter Turnbull
Network Manager
University of York
6:12 p.m.
Pete Turnbull wrote:
On 02/08/2009
10:22, tiggerlasv at aim.com wrote:
One can't really tell much without opening
the back panel,
but I will make a guess based on the photos provided in the auction
listing,
and typical system configurations from the period.
It would appear that this is a PDP-11/23+ system.
You mean a "microPDP-11/23". A PDP-11/23plus would be in a BA11-S
box. Same processor board, though, but very different boot ROMs. This is based
on the basic "Micro PDP-11" medallion on the front panel,
and the 2-port cab-kit, which is standard for the 11/23+ only.
The badge could be any of the microPDP-11 series, as far as I can see.
But it is a 2-port cab kit -- well spotted (on single-port ones the
baud rate legend and selector are in the middle, with the DB25 at one
end and the LED displays at the other) so unless it's been upgraded
this is a KDF11 system, not a KDJ11. I see two
4-port cab-kits on there, which, based on the era
is most likely a DHV11, but it could be a pair of DZV11's as well.
Could even be a couple of DLV11-Js, though that's less likely. There is a
lone connector in one of the "A" slots,
which could be just about anything. It sort of looks like
the LPV11 cabinet kit with the 37-pin connector,
but that is just speculation.
Could be; I thought about a DLV11-E or a DPV11, but the connector
looks too big for those. Maybe a TQK25 kit, I can't remember what the
connector on those was. The RX50's
tell you that there should be an RQDXn controller
installed (most likely an RQDX2) which might also indicate
the presence of an RD52 or RD53 disk drive behind the front bezel.
If it were an 11/23 variant it would much more likely be an RQDX1, but
that's very similar. 
11:07 p.m.
Based on the ten BA23 boxed PDP11 examples in my collection I'd say Pete was
spot on
Regards
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Pete Turnbull
Sent: 02 August 2009 13:25
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: I'm sure someone has info on this...
On 02/08/2009 10:22, tiggerlasv at aim.com wrote:
One can't really tell much without opening the back panel,
but I will make a guess based on the photos provided in the auction
listing,
and typical system configurations from the period.
It would appear that this is a PDP-11/23+ system.
You mean a "microPDP-11/23". A PDP-11/23plus would be in a BA11-S box.
Same processor board, though, but very different boot ROMs.
This is based on the basic "Micro PDP-11"
medallion on the front panel,
and the 2-port cab-kit, which is standard for the 11/23+ only.
The badge could be any of the microPDP-11 series, as far as I can see.
But it is a 2-port cab kit -- well spotted (on single-port ones the baud
rate legend and selector are in the middle, with the DB25 at one end and
the LED displays at the other) so unless it's been upgraded this is a
KDF11 system, not a KDJ11.
I see two 4-port cab-kits on there, which, based on
the era
is most likely a DHV11, but it could be a pair of DZV11's as well.
Could even be a couple of DLV11-Js, though that's less likely.
There is a lone connector in one of the "A"
slots,
which could be just about anything. It sort of looks like
the LPV11 cabinet kit with the 37-pin connector,
but that is just speculation.
Could be; I thought about a DLV11-E or a DPV11, but the connector looks
too big for those. Maybe a TQK25 kit, I can't remember what the
connector on those was.
The RX50's tell you that there should be an RQDXn
controller
installed (most likely an RQDX2) which might also indicate
the presence of an RD52 or RD53 disk drive behind the front bezel.
If it were an 11/23 variant it would much more likely be an RQDX1, but
that's very similar.
--
Pete Peter Turnbull
Network Manager
University of York
3 Aug
3 Aug
1:52 a.m.
Everyone----
Thank you very much for the information. I've asked the seller if
they can post some better photos. If they do, I'll let everyone know.
I like this machine, but the shipping cost for it ($133) is almost as
much as the opening bid ($150).
Mark
On Sun, Aug 2, 2009 at 11:07 PM, Rod
Smallwood<rodsmallwood at btconnect.com> wrote:
Based on the ten BA23 boxed PDP11 examples in my
collection I'd say Pete was
spot on
Regards
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Pete Turnbull
Sent: 02 August 2009 13:25
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: I'm sure someone has info on this...
On 02/08/2009 10:22, tiggerlasv at aim.com wrote:
One can't really tell much without opening the back panel,
but I will make a guess based on the photos provided in the auction
listing,
and typical system configurations from the period.
It would appear that this is a PDP-11/23+ system.
You mean a "microPDP-11/23". ?A PDP-11/23plus would be in a BA11-S box.
?Same processor board, though, but very different boot ROMs.
This is based on the basic "Micro
PDP-11" medallion on the front panel,
and the 2-port cab-kit, which is standard for the 11/23+ only.
The badge could be any of the microPDP-11 series, as far as I can see.
But it is a 2-port cab kit -- well spotted (on single-port ones the baud
rate legend and selector are in the middle, with the DB25 at one end and
the LED displays at the other) so unless it's been upgraded this is a
KDF11 system, not a KDJ11.
I see two 4-port cab-kits on there, which, based
on the era
is most likely a DHV11, but it could be a pair of DZV11's ?as well.
Could even be a couple of DLV11-Js, though that's less likely.
There is a lone connector in one of the
"A" slots,
which could be just about anything. ? It sort of looks like
the LPV11 cabinet kit with the 37-pin connector,
but that is just speculation.
Could be; I thought about a DLV11-E or a DPV11, but the connector looks
too big for those. ?Maybe a TQK25 kit, I can't remember what the
connector on those was.
The RX50's tell you that there should be an
RQDXn controller
installed (most likely an RQDX2) which might also indicate
the presence of an RD52 or RD53 disk drive behind the front bezel.
If it were an 11/23 variant it would much more likely be an RQDX1, but
that's very similar.
--
Pete ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Peter Turnbull
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Network Manager
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?University of York
11:20 a.m.
Everyone----
Thank you very much for the information. I've asked the seller if
they can post some better photos. If they do, I'll let everyone know.
I like this machine, but the shipping cost for it ($133) is almost as
much as the opening bid ($150).
That is not necessarily a reason for not buying it. Many times I've
bought something on E-bay where the shipping charage is several times the
winning bid (or B-I-N). I just think that if the total cost (my high bid
+ shipping) is less that I think the machine is worth, then I'll buy it
and not worry how much is 'machine' and how much is 'shipping'.
Wheterh this machine is worth around $300 to you is something I can't say.
-tony
12:31 p.m.
On Mon, Aug 3, 2009 at 11:20 AM, Tony Duell<ard at p850ug1.demon.co.uk> wrote:
I realize now that what I said came out completely wrong. :)
I've done the same thing... I've bought machines where the
shipping/transport costs were far larger than the price of the
machine. It's just that right now the money is tight because of some
unexpected bills and I was being overly tight in my assessment. :)
Mark
Everyone----
Thank you very much for the information. ?I've asked the seller if
they can post some better photos. ?If they do, I'll let everyone know.
?I like this machine, but the shipping cost for it ($133) is almost as
much as the opening bid ($150).
That is not necessarily a reason for not buying it. Many times I've
bought something on E-bay where the shipping charage is several times the
winning bid (or B-I-N). I just think that if the total cost (my high bid
+ shipping) is less that I think the machine is worth, then I'll buy it
and not worry how much is 'machine' and how much is 'shipping'.
Wheterh this machine is worth around $300 to you is something I can't say.
5403
days inactive
5404
days old
6 comments
6 participants
participants (6)
-
ard＠p850ug1.demon.co.uk -
jhfinedp3k＠compsys.to -
mdavidson1963＠gmail.com -
pete＠dunnington.plus.com -
rodsmallwood＠btconnect.com -
tiggerlasv＠aim.com