On Mon, 2 Jan 2017, Jon Elson wrote:
(For reference, we were talking about my experiences with a Bendix G-15, not
an LGP-30.) So, I think the G-15 drum had a brass sleeve that might have
How should I know? Change the subject then!
Christian
On 01/02/2017 02:39 AM, Christian Corti wrote:
On Fri, 30 Dec 2016, Jon Elson wrote:
Is your drum in good condition? Ours was full of dust,
and 3 tracks had been ground down to the brass due to
dust packing under the heads.
You can relocate bad tracks as there are a couple of spare
tracks.
On Fri, 30 Dec 2016, Jon Elson wrote:
Is your drum in good condition? Ours was full of dust, and 3 tracks had been
ground down to the brass due to dust packing under the heads.
You can relocate bad tracks as there are a couple of spare tracks. And the
drum is made of aluminium, not brass.
C
> On Dec 30, 2016, at 6:22 PM, Antonio Carlini wrote:
>
> On 30/12/16 17:49, Paul Koning wrote:
>> The Dutch computer ARMAC had a nice optimization, a track buffer. Under
>> software control a given track would be copied to that buffer (in some sort
>> of RAM -- core?) and then references to t
On 30/12/16 17:49, Paul Koning wrote:
The Dutch computer ARMAC had a nice optimization, a track buffer.
Under software control a given track would be copied to that buffer
(in some sort of RAM -- core?) and then references to those addresses
would be satisfied from the buffer. You could think o
Is your drum in good condition? Ours was full of dust, and 3 tracks had
been ground down to the brass due to dust packing under the heads.
We haven't inspected it that closely.
On 12/30/2016 09:49 AM, Paul Koning wrote:
> I have an old set of lecture notes I'm translating, for a course on
> computer design from 1948, which discusses various memory types. Not
> core memory, that came later. But it mentions drums, and theorizes
> that those might be operated at 60,000 rp
On Fri, Dec 30, 2016 at 01:02:50AM -0500, Evan Koblentz wrote:
Yes. When museum visitors ask, "What is its clock speed?," I reply,
"Something like a few hundred RPM." :)
would 1 RPM be 60 cycles per second?
> On Dec 30, 2016, at 12:51 AM, Jon Elson wrote:
>
> On 12/29/2016 10:04 PM, Noel Chiappa wrote:
>> ...
> Ouch! That means it runs one instruction per revolution of the drum? that
> would slow it to something like 30 IPS!
>> ...
>> Oh, I think a good case can be made. People often cite the LI
On 12/30/2016 01:09 AM, Mark Linimon wrote:
(as you might imagine, most coding was done in machine
language -- the compilers trying to deal with this was a
nightmare. And waay slow.)
Yes, supposedly the Algol compiler took two days to run on a
modest program.
Jon
On 12/29/2016 11:37 PM, Evan Koblentz wrote:
I know it's getting off-topic, but anyone who wants to see
a G-15 is welcome to come visit the Vintage Computer
Federation museum in New Jersey. There were 500 units
made. The one here is believed to be number three. :) We
hope to restore it one of
> From: Jon Elson
> That means it runs one instruction per revolution of the drum?
I don't think it's quite that bad; ISTR something in the manual (BitSavers
has a good selection of them, it was in the Programming Manual, which is
quite interesting to look at) about how 'logical' sequenti
On Thu, Dec 29, 2016 at 11:51:27PM -0600, Jon Elson wrote:
> There were instructions that would copy a whole long line of data to
> the short lines so that these could be accessed every 4 word times,
> instead of having to wait a full drum revolution for the next word.
Yeah, I had forgotten about
On Fri, Dec 30, 2016 at 12:37:00AM -0500, Evan Koblentz wrote:
> There were 500 units made.
Hmm ... I remember from the old days that it was in the low 200s.
> We hope to restore it one of these days.
Well let me know if I can help. In the new year one of my tasks is
to dust off the G-15 web si
On Fri, Dec 30, 2016 at 01:02:50AM -0500, Evan Koblentz wrote:
> Yes. When museum visitors ask, "What is its clock speed?," I reply,
> "Something like a few hundred RPM." :)
OK, try again. "29msec cycle time".
Look ... it was nearly 50 years ago, ok?
mcl
On Fri, Dec 30, 2016 at 01:02:50AM -0500, Evan Koblentz wrote:
> Yes. When museum visitors ask, "What is its clock speed?," I reply,
> "Something like a few hundred RPM." :)
Ancient dusty brain cells say "29usec cycle time".
mcl
I know it's getting off-topic, but anyone who wants to see a G-15 is
welcome to come visit the Vintage Computer Federation museum in New
Jersey. There were 500 units made. The one here is believed to be number
three. :) We hope to restore it one of these days.
Ouch! That means it runs one instruction per revolution of the drum?
Yes. When museum visitors ask, "What is its clock speed?," I reply,
"Something like a few hundred RPM." :)
(I don't actually know how fast the motor spins, but my reply gets the
point across.)
On 12/29/2016 10:04 PM, Noel Chiappa wrote:
> From: Cory Heisterkamp
> this is likely as close as I'll ever come to having a first generation
> machine
Dude, as far as I'm concerned, if it uses some sort of circulating memory for
main memory (either delay line or drum), it's pret
On Thu, 12/29/16, Noel Chiappa wrote:
> Interesting factoid about the Bendix G-15: it was designed with the help of
> one of the ACE people (Harry Huskey), and is basically a re-packaged ACE with
> drum instead of delay lines. There's an interesting article by Huskey himself
> in "Alan Turing's A
> From: Cory Heisterkamp
> this is likely as close as I'll ever come to having a first generation
> machine
Dude, as far as I'm concerned, if it uses some sort of circulating memory for
main memory (either delay line or drum), it's pretty much first generation (of
course, it all depen
On Dec 28, 2016, at 4:16 PM, jim stephens wrote:
>
> On 12/28/2016 8:38 AM, Cory Heisterkamp wrote:
>>
>> Guys, thanks for all the feedback. A challenge? Absolutely. But this is
>> likely as close as I'll ever come to having a first generation machine,
>> something unfathomable to me as a kid
Ran into the same problem about 20 years ago. So now I make sure if
there is nothing on the equip marked Made in the USA, I take along
either an original catalog or manual, one time only had a
advertisement but it is what did the trick.
On Wed, Dec 28, 2016 at 3:16 PM, jim stephens wrote:
>
>
>
On 12/28/2016 8:38 AM, Cory Heisterkamp wrote:
Guys, thanks for all the feedback. A challenge? Absolutely. But this is likely
as close as I'll ever come to having a first generation machine, something
unfathomable to me as a kid.
Apologies for the radio-silence, we've put 1200+ miles under
Indeed the opportunity of a lifetime!
Safe travels! Cory!
Ed#
In a message dated 12/28/2016 9:38:25 A.M. US Mountain Standard Time,
coryheisterk...@gmail.com writes:
On Dec 26, 2016, at 8:49 AM, william degnan wrote:
> On Mon, Dec 26, 2016 at 10:37 AM, Christian Corti <
> c...@informa
On Dec 26, 2016, at 8:49 AM, william degnan wrote:
> On Mon, Dec 26, 2016 at 10:37 AM, Christian Corti <
> c...@informatik.uni-stuttgart.de> wrote:
>
>> On Fri, 23 Dec 2016, Cory Heisterkamp wrote:
>>
>>> I recently became the owner of an LGP-30, supposedly in 'working'
>>> condition. However,
On Mon, 26 Dec 2016, Adam Sampson wrote:
"Underhill Engineering Co Ltd" painted on the top in the eBay pictures
(if you squint) is a bit of a giveaway!
I was only able to see "Under...".
They have a nice page about the machine's history:
http://www.underhill.ca/land-survey-project/15/underhil
Christian Corti writes:
> If you tell me its serial number I can eventually tell you who
> was/were the previous owner(s) ;-)
"Underhill Engineering Co Ltd" painted on the top in the eBay pictures
(if you squint) is a bit of a giveaway!
They have a nice page about the machine's history:
http://
On Mon, Dec 26, 2016 at 11:01 AM, Christian Corti <
c...@informatik.uni-stuttgart.de> wrote:
> On Sat, 24 Dec 2016, william degnan wrote:
>
>> Here are my notes on the LGP 30
>> http://www.vintagecomputer.net/browse_thread.cfm?id=596
>>
>
> There are several errors in those notes:
>
>
You addresse
On Sat, 24 Dec 2016, william degnan wrote:
Here are my notes on the LGP 30
http://www.vintagecomputer.net/browse_thread.cfm?id=596
There are several errors in those notes:
- "The basic (hardware) bootstrap in LGP-30 mnemonic format:"
There is no hardware bootstrap.
- The addresses in the boo
>
> They really looked at this thing to be a personal computer. This was
> some may claim by some definition the *first* personal computer.
>
>
>
>
Note I am being very careful not to call this "the first personal
computer", but it's certainly a personal computer and it was one of the
first store
On Mon, Dec 26, 2016 at 10:37 AM, Christian Corti <
c...@informatik.uni-stuttgart.de> wrote:
> On Fri, 23 Dec 2016, Cory Heisterkamp wrote:
>
>> I recently became the owner of an LGP-30, supposedly in 'working'
>> condition. However, the machine is roughly 2000 miles from me and will need
>> to be
On Fri, 23 Dec 2016, Cory Heisterkamp wrote:
I recently became the owner of an LGP-30, supposedly in 'working'
condition. However, the machine is roughly 2000 miles from me and will
need to be transported by freight. Before it's palletized, are there any
special precautions I should take to ens
On Fri, 23 Dec 2016, Cory Heisterkamp wrote:
Yep Chuck, this is the CA machine. I was surprised it never reared its
head on classiccmp the past few days. -C
If you tell me its serial number I can eventually tell you who was/were
the previous owner(s) ;-)
Christian
On Dec 25, 2016 9:01 PM, "Al Kossow" wrote:
>
> and this shows the major assemblies
>
http://computermuseum.informatik.uni-stuttgart.de/dev/lgp30_40/lgp30_deko.html
>
> On 12/25/16 6:00 PM, Al Kossow wrote:
> >
> >
> > On 12/25/16 2:20 PM, Jon Elson wrote:
> >>
> >> you'd need to resurrect some bi
and this shows the major assemblies
http://computermuseum.informatik.uni-stuttgart.de/dev/lgp30_40/lgp30_deko.html
On 12/25/16 6:00 PM, Al Kossow wrote:
>
>
> On 12/25/16 2:20 PM, Jon Elson wrote:
>>
>> you'd need to resurrect some bit of software to do anything meaningful.
>
>
> a lot already
On 12/25/16 2:20 PM, Jon Elson wrote:
>
>you'd need to resurrect some bit of software to do anything meaningful.
a lot already is on line
http://computermuseum.informatik.uni-stuttgart.de/dev_en/lgp30/
ftp://ftp.informatik.uni-stuttgart.de/pub/cm/lgp30/
On 12/23/2016 08:06 AM, Cory Heisterkamp wrote:
Hi Folks,
I recently became the owner of an LGP-30, supposedly in 'working'
condition.
I worked just a little bit on a Bendix G-15, a machine from
about the same vintage. 300 vacuum tubes, about 3000
silicon (I think) diodes, and a drum. Real
On 2016-Dec-23, at 4:14 PM, Cory Heisterkamp wrote:
>> On Fri, Dec 23, 2016 at 11:45 AM, Chuck Guzis wrote:
>>
>>> On 12/23/2016 08:06 AM, Cory Heisterkamp wrote:
Hi Folks,
I recently became the owner of an LGP-30, supposedly in 'working'
condition. However, the machine is ro
On 2016-Dec-23, at 4:14 PM, Cory Heisterkamp wrote:
>> On Fri, Dec 23, 2016 at 11:45 AM, Chuck Guzis wrote:
>>
>>> On 12/23/2016 08:06 AM, Cory Heisterkamp wrote:
Hi Folks,
I recently became the owner of an LGP-30, supposedly in 'working'
condition. However, the machine is ro
Original message
From: william degnan
Date: 2016-12-24 3:35 AM (GMT-08:00)
To: cctech
Subject: Re: Transporting an LGP-30
> Well, I think you guys have convinced me that a trip is in order. Better
safe than sorry with a piece of equipment like this.
>
> Yep Ch
> Well, I think you guys have convinced me that a trip is in order. Better
safe than sorry with a piece of equipment like this.
>
> Yep Chuck, this is the CA machine. I was surprised it never reared its
head on classiccmp the past few days. -C
Believe me, I for one was interested, and I was in con
On Dec 23, 2016, at 1:57 PM, Pete Lancashire wrote:
> I 2nd what Chuck recommended, if that's not an option find someone you 100%
> trust. Anything that shock would hurt, have it removed, then one could find
> a electronic equipment mover. Most of the big moving van companies provide
> that servi
> On Dec 23, 2016, at 3:27 PM, Chuck Guzis wrote:
>
> One more thought.
>
> IIRC, there's quite a large motor that's used for the drum (mounted just
> below the drum). That should be removed and shipped separately also.
> I cannot envision the carnage should that big hunk of iron break loose
On 12/23/2016 1:27 PM, Chuck Guzis wrote:
One more thought.
IIRC, there's quite a large motor that's used for the drum (mounted just
below the drum). That should be removed and shipped separately also.
I cannot envision the carnage should that big hunk of iron break loose
during shipping.
--C
I 2nd what Chuck recommended, if that's not an option find someone you 100%
trust. Anything that shock would hurt, have it removed, then one could find
a electronic equipment mover. Most of the big moving van companies provide
that service.
-pete
On Fri, Dec 23, 2016 at 11:45 AM, Chuck Guzis wro
One more thought.
IIRC, there's quite a large motor that's used for the drum (mounted just
below the drum). That should be removed and shipped separately also.
I cannot envision the carnage should that big hunk of iron break loose
during shipping.
--Chuck
On 12/23/2016 08:06 AM, Cory Heisterkamp wrote:
> Hi Folks,
>
> I recently became the owner of an LGP-30, supposedly in 'working'
> condition. However, the machine is roughly 2000 miles from me and
> will need to be transported by freight. Before it's palletized, are
> there any special precaution
take a ski trip while you're there.
Bill Degnan
twitter: billdeg
vintagecomputer.net
On Dec 23, 2016 2:46 PM, "Chuck Guzis" wrote:
> On 12/23/2016 08:06 AM, Cory Heisterkamp wrote:
> > Hi Folks,
> >
> > I recently became the owner of an LGP-30, supposedly in 'working'
> > condition. However, the
Hi Folks,
I recently became the owner of an LGP-30, supposedly in 'working' condition.
However, the machine is roughly 2000 miles from me and will need to be
transported by freight. Before it's palletized, are there any special
precautions I should take to ensure its safe travel. I'm especially
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