On 4/18/24 14:01, paul.kimpel--- via cctalk wrote:
> The tape for the Burroughs 220 drives was not metallic. It was 3/4-inch wide,
> and I think a Mylar sandwich. It could be spliced much the same way you would
> have spliced quarter-inch reel-to-reel audio tape back in the day.
>
The Datamatic
The main storage area of the ElectroData/Burroughs Datatron 205 was 20 tracks
of 200 words each for a total of 4000 words. The drum rotated at 3570 RPM, so
the average access time was about 8.4ms.
The four quick-access tracks (or "loops" as they were called) were 20 words
each and worked as a
The tape for the Burroughs 220 drives was not metallic. It was 3/4-inch wide,
and I think a Mylar sandwich. It could be spliced much the same way you would
have spliced quarter-inch reel-to-reel audio tape back in the day.
If the tape controller detected a parity error, it would backspace the
On Sun, 2024-04-14 at 15:11 -0400, Paul Koning wrote:
> > On Apr 14, 2024, at 2:50 PM, Van Snyder via cctalk <
> > cctalk@classiccmp.org> wrote:
> > On Sun, 2024-04-14 at 13:15 -0400, Paul Koning via cctalk wrote:
> > > The printer I was describing sounds a lot like the Versatec ones
> > >
> On Apr 14, 2024, at 2:50 PM, Van Snyder via cctalk
> wrote:
>
> On Sun, 2024-04-14 at 13:15 -0400, Paul Koning via cctalk wrote:
>> The printer I was describing sounds a lot like the Versatec ones you
>> mentioned, including the funny paper and smelly toner. But it was
>> actually made by
On Sun, 2024-04-14 at 13:15 -0400, Paul Koning via cctalk wrote:
> The printer I was describing sounds a lot like the Versatec ones you
> mentioned, including the funny paper and smelly toner. But it was
> actually made by Varian, and the driver tells me it had 1408 pixels
> across the width of
> On Apr 13, 2024, at 5:48 PM, Jon Elson via cctalk
> wrote:
>
> On 4/12/24 20:21, Paul Koning via cctalk wrote:
>>
>>> On Apr 12, 2024, at 7:48 PM, Van Snyder via cctalk
>>> wrote:
>>>
>>> ... The other was to print on its "whippet"
>>> printer, a very fast electrostatic printer that
On Fri, Apr 12, 2024 at 9:45 AM Christian Kennedy via cctalk
wrote:
While on the topic of odd IBM mass storage systems, does anyone recall
an IBM system that used rotating carousels holding sheets of magnetic
material? The carousel would rotate to position the selected sheet into
the
On Fri, Apr 12, 2024 at 9:45 AM Christian Kennedy via cctalk <
cctalk@classiccmp.org> wrote:
>
> While on the topic of odd IBM mass storage systems, does anyone recall
> an IBM system that used rotating carousels holding sheets of magnetic
> material? The carousel would rotate to position the
Plato experience is still active including the games at https://www.cyber1.org/
Regards,
Tarek Hoteit
AI Consultant, PhD
+1 360-838-3675
https://tarek.computer
INFOCOM AI LLC - https://infocom.ai
> On Apr 13, 2024, at 10:20, Paul Koning via cctalk
> wrote:
>
>
>
>> On Apr 12, 2024, at
On 4/12/24 20:21, Paul Koning via cctalk wrote:
On Apr 12, 2024, at 7:48 PM, Van Snyder via cctalk
wrote:
... The other was to print on its "whippet"
printer, a very fast electrostatic printer that put soot onto a thermal
paper that was then heated to "fix" it. There was a huge variac under
At 10:00 AM 4/13/2024, Paul Berger wrote:
The problem with a lot of these old machines was they relied on a lot of
electro-mechanical devices that would today be replaced by electronics
and a few simple actuators. These mechanical devices need to be
adjusted and maintained and have lots of
On 4/13/24 10:20, Paul Koning via cctalk wrote:
>
>
> PLATO was the system where a whole lot of early games first appeared,
> especially multi-player games. Among them were any number of variations of
> "Star Trek" inspired ones. While you couldn't refresh a screen full of space
> ships in
On 4/13/24 12:20, Paul Koning via cctalk wrote:
On Apr 12, 2024, at 9:49 PM, ben via cctalk wrote:
On 2024-04-12 7:23 p.m., Paul Koning via cctalk wrote:
On Apr 12, 2024, at 5:54 PM, CAREY SCHUG via cctalk
wrote:
...
my favorite terminal 3190 that was neon gas, so monochrome, but could
> On Apr 12, 2024, at 9:49 PM, ben via cctalk wrote:
>
> On 2024-04-12 7:23 p.m., Paul Koning via cctalk wrote:
>>> On Apr 12, 2024, at 5:54 PM, CAREY SCHUG via cctalk
>>> wrote:
>>>
>>> ...
>>> my favorite terminal 3190 that was neon gas, so monochrome, but could take
>>> 5 addresses,
On 2024-04-12 7:23 p.m., Paul Koning via cctalk wrote:
On Apr 12, 2024, at 5:54 PM, CAREY SCHUG via cctalk
wrote:
...
my favorite terminal 3190 that was neon gas, so monochrome, but could take 5
addresses, and flip between 62 lines of 160 characters (always there), to 4
terminals of
> On Apr 12, 2024, at 5:54 PM, CAREY SCHUG via cctalk
> wrote:
>
> ...
> my favorite terminal 3190 that was neon gas, so monochrome, but could take 5
> addresses, and flip between 62 lines of 160 characters (always there), to 4
> terminals of 62x80 any two visible at a time, or 4 terminals
> On Apr 12, 2024, at 7:48 PM, Van Snyder via cctalk
> wrote:
>
> ... The other was to print on its "whippet"
> printer, a very fast electrostatic printer that put soot onto a thermal
> paper that was then heated to "fix" it. There was a huge variac under
> the printer to adjust the heater.
On Fri, 2024-04-12 at 15:05 -0700, Chuck Guzis via cctalk wrote:
>
>
> One that comes to mind is the Datatron/Burroughs B-205, used as a prop
> in several Hollywood productions (or at least pieces of one)..
>
In the computer center, beside the 7094/7044 Direct Couple, Caltech had
a
On 4/12/24 14:27, Van Snyder via cctalk wrote:
> On Fri, 2024-04-12 at 16:13 -0400, Paul Koning via cctalk wrote:
>> Not all that fast, well, it depends on what you're comparing with.
>> Given tube logic with cycle times measures in microseconds, quite
>> possibly serial rather than parallel
On 4/12/24 14:54, CAREY SCHUG via cctalk wrote:
> https://en.wikipedia.org/wiki/List_of_IBM_products for genuine ibm devices.
>
> Calcomp (and others?) had automated tape libraries for reel to reel taps.
> The cartridge tape library that staged onto 3350s (and later 3380s?)
The
https://en.wikipedia.org/wiki/List_of_IBM_products for genuine ibm devices.
Calcomp (and others?) had automated tape libraries for reel to reel taps.
STC (and others?) had automated tape libraries for the 3480 carts
plotters?
1404 printer (I've mentioned before) that could print on two tab
On Fri, 2024-04-12 at 16:13 -0400, Paul Koning via cctalk wrote:
> Not all that fast, well, it depends on what you're comparing with.
> Given tube logic with cycle times measures in microseconds, quite
> possibly serial rather than parallel organization, those acoustic or
> drum memory systems
On Fri, 2024-04-12 at 15:04 -0400, Paul Koning via cctalk wrote:
> Some of the earliest magnetic storage was mechanically simple:
> magnetic drums. Nothing moving apart from the spinning media, and
> quite fast. Fixed head ("head per track") disk drives are a
> variation on that theme, DEC had
> On Apr 12, 2024, at 3:25 PM, Chuck Guzis via cctalk
> wrote:
>
> On 4/12/24 12:04, Paul Koning via cctalk wrote:
>
>> I remember a concept for a very fast magnetic storage system that didn't
>> become a product, as far as I know. The scheme was to build a large array
>> of heads, using
On 4/12/24 12:04, Paul Koning via cctalk wrote:
> I remember a concept for a very fast magnetic storage system that didn't
> become a product, as far as I know. The scheme was to build a large array of
> heads, using IC-manufacturing type techniques, and mount that array in
> contact or
> On Apr 12, 2024, at 2:28 PM, Paul Berger via cctalk
> wrote:
>
>
> On 2024-04-12 2:45 p.m., Christian Kennedy via cctalk wrote:
>>
>> On 4/12/24 10:28, Chuck Guzis via cctalk wrote:
>>> Isn't that the IBM 2321 Data Cell drive?
>>
>> Same idea, but I recall the cabinets being lower to
On 4/12/24 11:28, Paul Berger via cctalk wrote:
The 1360 was apparently developed at the request to Atomic Energy
Commission (AEC), I would guess a forerunner of the DOE. There
where apparently only 5 built 3 for the AEC and 2 for the NSA.
IIRC, the 1360 was developed from Walnut,
On 2024-04-12 2:45 p.m., Christian Kennedy via cctalk wrote:
On 4/12/24 10:28, Chuck Guzis via cctalk wrote:
Isn't that the IBM 2321 Data Cell drive?
Same idea, but I recall the cabinets being lower to the floor and the
media being more rigid than the 2321 noodles. Then again, it's been
On 4/12/24 10:28, Chuck Guzis via cctalk wrote:
Isn't that the IBM 2321 Data Cell drive?
Same idea, but I recall the cabinets being lower to the floor and the
media being more rigid than the 2321 noodles. Then again, it's been the
better part of 50 years, and it could well have been a
On 4/12/24 09:45, Christian Kennedy via cctalk wrote:
>
> On 4/12/24 05:31, Paul Koning via cctalk wrote
>
> [snip]
>> Yes. See also https://en.wikipedia.org/wiki/IBM_2321_Data_Cell . By
>> the standards of the time it was an unusually high capacity storage
>> device, way faster than a room
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