On 2015-12-13 4:28 AM, Chuck Guzis wrote:
On 12/12/2015 07:41 PM, dwight wrote:
I would assume it makes no sense to have it in the cable. It is
acoustic not electronic. Typically it would be a loop. Data and
possibly clock goes in one end.
As a practical example, consider the Packard-Bell 250
OK - I was told they were mercury, but frankly, I have been sort of
skeptical that mercury delay lines would still be used in new digital
designs that late in the game. Wire makes far more sense.
--
Will
On Sun, Dec 13, 2015 at 1:09 AM, Brent Hilpert wrote:
> On 2015-Dec-12, at 7:13 PM, Eric Chr
On 2015-12-12 11:37 PM, William Donzelli wrote:
The IBM 2848, the control unit for the 2260 terminals, contained
mercury (!) delay line for the video memory. There may have been some
compensation for the transmission to the terminal, but I have have not
seen the technical details - I think it was
On 12/12/2015 09:13 PM, Eric Christopherson wrote:
I'm reading about those terminals and find it just
fascinating how they used acoustic delay line memory to
remember the pixels. But I have lots of questions: 1. Did
the cables connecting the 2260s to the display controller
actually contain the
On 12/12/2015 09:37 PM, William Donzelli wrote:
The IBM 2848, the control unit for the 2260 terminals, contained
mercury (!) delay line for the video memory. There may have been some
compensation for the transmission to the terminal, but I have have not
seen the technical details - I think it was
On 12/12/2015 07:41 PM, dwight wrote:
I would assume it makes no sense to have it in the cable. It is
acoustic not electronic. Typically it would be a loop. Data and
possibly clock goes in one end.
As a practical example, consider the Packard-Bell 250 computer. No,
not the Packard-Bell PC o
On 2015-Dec-12, at 7:13 PM, Eric Christopherson wrote:
> On Sat, Dec 12, 2015, Jon Elson wrote (in the big top posting thread):
>>
>> Later they got some
>> IBM 2260's, which were Zenith 9" TV sets and a keyboard connected to an
>> interface box in the machine room. Very primitive, but very inter
From: cctalk on behalf of Eric Christopherson
Sent: Saturday, December 12, 2015 7:13 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: IBM 2260 acoustic delay line
On Sat, Dec 12, 2015, Jon Elson wrote (in the big top posting thread
The IBM 2848, the control unit for the 2260 terminals, contained
mercury (!) delay line for the video memory. There may have been some
compensation for the transmission to the terminal, but I have have not
seen the technical details - I think it was not a concern, probably.
Line loss is really not
On 12 December 2015 at 22:13, Eric Christopherson
wrote:
> I'm reading about those terminals and find it just fascinating how they
> used acoustic delay line memory to remember the pixels. But I have lots
> of questions:
>
> 1. Did the cables connecting the 2260s to the display controller
> actual
On Sat, Dec 12, 2015, Jon Elson wrote (in the big top posting thread):
> On 12/12/2015 07:22 AM, Mike wrote:
> >The one question I do have for the older gentlemen on here is what in the
> >world did the computers without a screen to look at do? Now I know about
> >the tape, cassette tape's and even
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