There's a reason why we ran the RA81s in pairs in the cluster...
On 12 February 2016 at 01:39, Jay West wrote:
> Guy wrote...
> -
> In late '86 I was running a VAX8500 with 2 RA81s
> -
> Can't be true. There's no such thing as running RA81's *Grin*
>
> J
>
>
>
--
4.4 > 5.4
On Thu, 11 Feb 2016, Jay West wrote:
Guy wrote...
-
In late '86 I was running a VAX8500 with 2 RA81s
-
Can't be true. There's no such thing as running RA81's *Grin*
Don't laugh. in 1993 I was running FOUR of them connected to a VAX 8250.
In my house. Upstairs. :)
g.
--
Proud owner
> On 12 Feb 2016, at 12:39, Jay West wrote:
>
> Guy wrote...
> -
> In late '86 I was running a VAX8500 with 2 RA81s
> -
> Can't be true. There's no such thing as running RA81's *Grin*
My comments regarding RA81s run something like “we purchased two of the first
RA81s in Australia but
> On 12 Feb 2016, at 06:48, Rich Alderson
> wrote:
>
> DEC was the first company to build timeshared large systems as standard[1],
> beginning with the PDP-6. The PDP-10 (a reimplementation of the PDP-6) was
> successful enough to go through 3 generations (renamed to DECsystem-10 and
> DECSYST
On 02/11/2016 05:39 PM, Jerome H. Fine wrote:
Since your answer seems to be an unstated question, I will attempt to
answer what you might have inferred. I was just attempting to note that
the CDC 3300 hardware was able to support that function more than a
DECADE earlier. By 1967 when I arrived
>Rich Alderson wrote:
From: Jerome H. Fine
Sent: Thursday, February 11, 2016 8:56 AM
Jon Elson wrote:
We paid somewhere between 200 and 250K for our first 11/780. We had
an RM05 and a TU77, and 256 KB of memory. It was a pretty basic
system, but ran rings around the campus 360/65 system.
On 02/11/2016 10:56 AM, Jerome H. Fine wrote:
>Jon Elson wrote:
>On 02/11/2016 08:56 AM, Mark Wickens wrote:
It's good to hear that the VAX was a cost-effective
solution - there are
too many stories about how expensive DEC gear was, but I
imagine they
primarily came after PCs started droppi
Guy wrote...
-
In late '86 I was running a VAX8500 with 2 RA81s
-
Can't be true. There's no such thing as running RA81's *Grin*
J
tor 2016-02-11 klockan 13:41 -0800 skrev Glen Slick:
> My memories from the early 1980s are of a room full of undergrads
> working on rows of VT100s (maybe 50+ at least?) on a DECSYSTEM-2065
> running TOPS-20.
>
> Things usually seemed to run pretty well on that system, until the
> night before p
In late '86 I was running a VAX8500 with 2 RA81s and a TU80 for Deluxe
Coachlines in Australia. We computerised their coach reservation system.
System growth was brisk as the company and the application grew. The 8500
became an 8550 and gained some more RA81s and then in late 87 we move to a
new s
> On Feb 11, 2016, at 3:52 PM, Guy Sotomayor wrote:
>
>> ...
>
> In the mid-to-late 70’s, I was an undergrad at CMU. I had accounts on the
> CS department’s systems. When I started, it was 2 KA10s. Eventually a
> KL10 was added (all running a *heavily* patched version of TOPS10).
>
> During
My memories from the early 1980s are of a room full of undergrads
working on rows of VT100s (maybe 50+ at least?) on a DECSYSTEM-2065
running TOPS-20.
Things usually seemed to run pretty well on that system, until the
night before programming assignments were due.
Nothing quite like a room full o
> On Feb 11, 2016, at 12:39 PM, William Donzelli wrote:
>
>> Indeed. RSTS/E did better, with less hardware -- 64 users on an 11/70 was
>> no problem, and earlier on you could run 16 users on an 11/20 (though not
>> all that comfortably).
>
> It all depends on what the users are doing, of cou
> Indeed. RSTS/E did better, with less hardware -- 64 users on an 11/70 was no
> problem, and earlier on you could run 16 users on an 11/20 (though not all
> that comfortably).
It all depends on what the users are doing, of course. When I went to
school back in the late 1980s, the main computer
> From the very beginning? That is, 25 October 1977?
Some of the DECpeople that have graced the halls of RCS/RI have a
wildly different opinion.
VMS 1.0 was a total kludge, and could make an 11/780 fall over in no
time flat. 2.0 was a huge improvement. VMS just had to go back in the
oven for a w
> On Feb 11, 2016, at 2:48 PM, Rich Alderson
> wrote:
>
> From: Jerome H. Fine
> Sent: Thursday, February 11, 2016 8:56 AM
>
>>> Jon Elson wrote:
>
>>> We paid somewhere between 200 and 250K for our first 11/780. We had
>>> an RM05 and a TU77, and 256 KB of memory. It was a pretty basic
>
From: Jerome H. Fine
Sent: Thursday, February 11, 2016 8:56 AM
>> Jon Elson wrote:
>> We paid somewhere between 200 and 250K for our first 11/780. We had
>> an RM05 and a TU77, and 256 KB of memory. It was a pretty basic
>> system, but ran rings around the campus 360/65 system. We also had a
Just thinking about Mark’s email here. Keeping in mind that this is from a DEC
persons point of view. You probably all know and appreciate this. While the
DEC hardware may have been more expensive than other companies many customers
are still running the hardware today. I am thinking of sever
> DEC VT100s
> were around $1,800 in the early-1980s,
VT100s (and terminals in general) often were used as bargaining chips
to sweeten deals, so the price was quite "flexible".
--
Will
On Thu, Feb 11, 2016 at 9:56 AM, Mark Wickens wrote:
> It's good to hear that the VAX was a cost-effective solution - there are
> too many stories about how expensive DEC gear was, but I imagine they
> primarily came after PCs started dropping in price.
>
> On 9 February 2016 at 04:50, Ethan Dicks
>Jon Elson wrote:
>On 02/11/2016 08:56 AM, Mark Wickens wrote:
It's good to hear that the VAX was a cost-effective solution - there are
too many stories about how expensive DEC gear was, but I imagine they
primarily came after PCs started dropping in price.
We paid somewhere between 200 and
On 02/11/2016 08:56 AM, Mark Wickens wrote:
It's good to hear that the VAX was a cost-effective solution - there are
too many stories about how expensive DEC gear was, but I imagine they
primarily came after PCs started dropping in price.
We paid somewhere between 200 and 250K for our first
11
It's good to hear that the VAX was a cost-effective solution - there are
too many stories about how expensive DEC gear was, but I imagine they
primarily came after PCs started dropping in price.
On 9 February 2016 at 04:50, Ethan Dicks wrote:
> On Mon, Feb 8, 2016 at 11:11 PM, william degnan
>
> From: Henk Gooijen
> you need some some components to generate the AC LO and DC LO signals.
> The 11/04 needs them.
You could also do what I did on an off-brand LSI-11 chassis I had, whose
power supply was working (producing good +5V/+12V), but whose power control
board (to generat
On Tue, Feb 9, 2016 at 7:55 AM, tony duell wrote:
>> I don't know if
>> you could use the 256K boards (populated with 4116s) in the 11/730 due
>
> I am pretty sure (havng read and re-read the printset, I am restroring
> an 11/730 at the moment) that you can't use 256K boards in that machine.
> The
>
> Yep. The boards were used in the 11/70, the 11/730, and the 11/750.
> I don't know if
> you could use the 256K boards (populated with 4116s) in the 11/730 due
> to the tri-voltage
> 4116s, but even if they worked, you wouldn't want to - 5 of them just
> isn't that much RAM.
I am pretty sure
2016-02-09 10:48 GMT+01:00 Holm Tiffe :
> Christian Corti wrote:
>
> > On Mon, 8 Feb 2016, Mattis Lind wrote:
> > >layers of of a multilayer PCB. As mentioned earlier in this thread I
> did
> > >such a conversion on a MSV11-D board more than 25 years ago and then I
> had
> > >to lift up this pin
Christian Corti wrote:
> On Mon, 8 Feb 2016, Mattis Lind wrote:
> >layers of of a multilayer PCB. As mentioned earlier in this thread I did
> >such a conversion on a MSV11-D board more than 25 years ago and then I had
> >to lift up this pin and connect it via an extra wire.
>
> What about the DR
On Mon, 8 Feb 2016, Mattis Lind wrote:
layers of of a multilayer PCB. As mentioned earlier in this thread I did
such a conversion on a MSV11-D board more than 25 years ago and then I had
to lift up this pin and connect it via an extra wire.
What about the DRAM refresh? 4116 have a 7 bit refres
On Mon, Feb 8, 2016 at 11:11 PM, william degnan wrote:
> I ran my VAX 4000-200 all day today.
Nice.
> I have never worked with an older
I happened to get a lot of opportunity in the 80s to work with VAXen,
then Alphas in the 90s and a little beyond (I haven't been paid to run
VMS since about 20
On Mon, Feb 8, 2016 at 10:57 PM, Ethan Dicks wrote:
> On Mon, Feb 8, 2016 at 9:48 PM, Jon Elson wrote:
> > On 02/08/2016 03:23 PM, Ethan Dicks wrote:
> >>
> >> I don't know if you could use the 256K boards (populated with 4116s) in
> >> the 11/730 due to the tri-voltage 4116s, but even if they w
On Mon, Feb 8, 2016 at 9:48 PM, Jon Elson wrote:
> On 02/08/2016 03:23 PM, Ethan Dicks wrote:
>>
>> I don't know if you could use the 256K boards (populated with 4116s) in
>> the 11/730 due to the tri-voltage 4116s, but even if they worked, you
>> wouldn't want to - 5 of them just isn't that much
On 02/08/2016 03:23 PM, Ethan Dicks wrote:
I don't know if you could use the 256K boards (populated
with 4116s) in the 11/730 due to the tri-voltage 4116s,
but even if they worked, you wouldn't want to - 5 of them
just isn't that much RAM.
We ran our first 11/780 with 2 memory boards. I THINK
On Mon, Feb 8, 2016 at 1:33 PM, tony duell wrote:
>> > I heard that when Bristol University physics department got its first VAX
>> > (an 11/750,
>> > somewhat before my time), it was cheaper to buy 256K memory boards full of
>> > 16K RAM
>> > chips, clip them out, clean out the holes and solder
> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Pete
> Lancashire
> Sent: 08 February 2016 13:20
> To: General Discussion: On-Topic Posts
> Cc: classic...@classiccmp.org; jdr_...@bluewin.ch
> Subject: Re: The PDP11/04 has la
> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of tony
> duell
> Sent: 08 February 2016 15:25
> To: General Discussion: On-Topic Posts ;
> jdr_...@bluewin.ch; classic...@classiccmp.org
> Subject: RE: The PDP11/04 has landed..
>
2016-02-08 16:25 GMT+01:00 tony duell :
> >
> > I have one of these on my restoration list. I know the PSU does not
> work, and that others
> > have tried to fix it before me, who probably know PSUs much better than
> I do. It has core
> > memory so I really would like to get his one fixed. I hav
>
> I have one of these on my restoration list. I know the PSU does not work, and
> that others
> have tried to fix it before me, who probably know PSUs much better than I do.
> It has core
> memory so I really would like to get his one fixed. I have never seen a PSU
> for it come
> available
> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Jos
> Dreesen
> Sent: 07 February 2016 17:55
> To: classic...@classiccmp.org
> Subject: The PDP11/04 has landed..
>
> Yesterday I picked up the PDP11/04 that Jay mentioned a f
, Robert Jarratt
wrote:
>
>
> > -Original Message-
> > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Jos
> > Dreesen
> > Sent: 07 February 2016 17:55
> > To: classic...@classiccmp.org
> > Subject: The PDP11/04 has landed..
> >
On 07.02.2016 22:49, Jay West wrote:
Jos wrote...
--
restoration is to start next winter, after a house move which will nearly
double working area for the hobby.
--
Bhahahahaha From experience... it will never be enough space. Double it
again. Still won't be enough. These th
>
> > I heard that when Bristol University physics department got its first VAX
> > (an 11/750,
> > somewhat before my time), it was cheaper to buy 256K memory boards full of
> > 16K RAM
> > chips, clip them out, clean out the holes and solder in 64K RAMs rather
> > than to buy 1MByte
> > board
>> I assume they didn't buy a service contract with that machine? I doubt
> DEC would be real happy with that. Also, the 64K RAM chips need an extra
> address pin, were the boards laid out with that signal already in place?
>
Probably not since the new address signal used to be the +5V supply vo
On 02/08/2016 09:28 AM, tony duell wrote:
First week on the job in March 1980, my new boss brought me two pdp11/04s
and a box of memeory chips. He to told me to double the memory in
the two computers by populating all the empty holes on the memory boards.
I had a boss in 1987 that asked the sam
> > First week on the job in March 1980, my new boss brought me two pdp11/04s
> > and a box of memeory chips. He to told me to double the memory in
> > the two computers by populating all the empty holes on the memory boards.
>
> I had a boss in 1987 that asked the same of me...
I heard that whe
>
>
> Mine was a DEC MSV11 w/128Kbytes installed, solder filling the holes
> for the other half of the memory positions. I did not have problems
> with traces lifting from that board (I was using an adjustable Weller
> soldering station and had fine control over the temperature).
> Installing the
On Sun, Feb 7, 2016 at 11:57 PM, Richard Loken wrote:
> First week on the job in March 1980, my new boss brought me two pdp11/04s
> and a box of memeory chips. He to told me to double the memory in
> the two computers by populating all the empty holes on the memory boards.
I had a boss in 1987 t
2016-02-07 18:55 GMT+01:00 Jos Dreesen :
>
>
> Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago.
> Less than 15 miles from home !
>
> The machine spend its early days as a processor in chemical analysis
> apparatus, and was subsequently bought by the employee using it.
> Befor
> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Jos
> Dreesen
> Sent: 07 February 2016 17:55
> To: classic...@classiccmp.org
> Subject: The PDP11/04 has landed..
>
>
>
> Yesterday I picked up the PDP11/04 tha
On Sun, 7 Feb 2016, Jos Dreesen wrote:
Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago.
Less than 15 miles from home !
First week on the job in March 1980, my new boss brought me two pdp11/04s
and a box of memeory chips. He to told me to double the memory in
the two comp
Jos wrote...
--
restoration is to start next winter, after a house move which will nearly
double working area for the hobby.
--
Bhahahahaha From experience... it will never be enough space. Double it
again. Still won't be enough. These things reproduce *grin*
J
Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago.
Less than 15 miles from home !
The machine spend its early days as a processor in chemical analysis apparatus,
and was subsequently bought by the employee using it.
Before he could make use of it better, more powerful, easi
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