31 Aug
2016
31 Aug
'16
11:15 a.m.
Magnetorestrictive delay lines and a charactron.
http://bitsavers.org/pdf/rca/terminal/70_750/70-01-752-U_Model_70_752_Video…
We got one (no keyboard) a couple days ago with the manual. I'm still cleaning it up.
It had something nesting in it and
the inside has sunflower seed husks in it. It was made with plastic DIP ICs, no idea of
the logic family. The keyboard
was made by IBM, don't know what character code it produces. Pretty funky if it
encodes ASCII.
31 Aug
31 Aug
11:35 a.m.
On 2016-08-31 12:15 PM, Al Kossow wrote:
Magnetorestrictive delay lines and a charactron.
http://bitsavers.org/pdf/rca/terminal/70_750/70-01-752-U_Model_70_752_Video…
We got one (no keyboard) a couple days ago with the manual. I'm still cleaning it up.
It had something nesting in it and
the inside has sunflower seed husks in it. It was made with plastic DIP ICs, no idea of
the logic family. The keyboard
was made by IBM, don't know what character code it produces. Pretty funky if it
encodes ASCII.
Nice a selectric keyboard... It looks like it has links that operates a
microswitch for each of the bails. The bails that would get pulled when
the filter shaft comes around would depend on the tabs present on the
key interposers, so the key interposers would determine the coding of
the keyboard and it would be possible to have it generate 7 bit ASCII
code by using an appropriately "programmed" interposer under the keys.
Paul.
12:09 p.m.
On Wed, Aug 31, 2016 at 10:15 AM, Al Kossow <aek at bitsavers.org> wrote:
Magnetorestrictive delay lines and a charactron.
http://bitsavers.org/pdf/rca/terminal/70_750/70-01-752-U_
Model_70_752_Video_Data_Terminal_Maintenance_Manual_Oct73.pdf
We got one (no keyboard) a couple days ago with the manual. I'm still
cleaning it up. It had something nesting in it and
the inside has sunflower seed husks in it. It was made with plastic DIP
ICs, no idea of the logic family. The keyboard
was made by IBM, don't know what character code it produces. Pretty funky
if it encodes ASCII.
That URL redirects to
http://www.mirrorservice.org/sites/www.bitsavers.org/pdf/rca/terminal/70_75…
, which is showing a 404.
--
Eric Christopherson
12:35 p.m.
Looks like the folder name changed from 70_750 to 70_752:
----- Original Message -----
From: "Eric Christopherson" <echristopherson at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Sent: Wednesday, August 31, 2016 12:09 PM
Subject: Re: How to build an ASCII CRT terminal, circa 1967
On Wed, Aug 31, 2016 at 10:15 AM, Al Kossow <aek at
bitsavers.org> wrote:
Magnetorestrictive delay lines and a charactron.
http://bitsavers.org/pdf/rca/terminal/70_752/70-01-752-U_
Model_70_752_Video_Data_Terminal_Maintenance_Manual_Oct73.pdf
We got one (no keyboard) a couple days ago with the manual. I'm still
cleaning it up. It had something nesting in it and
the inside has sunflower seed husks in it. It was made with plastic DIP
ICs, no idea of the logic family. The keyboard
was made by IBM, don't know what character code it produces. Pretty funky
if it encodes ASCII.
That URL redirects to
http://www.mirrorservice.org/sites/www.bitsavers.org/pdf/rca/terminal/70_75…
, which is showing a 404.
--
Eric Christopherson
12:41 p.m.
Oops... should have read:
Looks like the folder changed from 70-750 to 70-752:
http://bitsavers.trailing-edge.com/pdf/rca/terminal/70_752/70-01-752-U_Mode…
----- Original Message -----
From: "Eric Christopherson" <echristopherson at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Sent: Wednesday, August 31, 2016 12:09 PM
Subject: Re: How to build an ASCII CRT terminal, circa 1967
On Wed, Aug 31, 2016 at 10:15 AM, Al Kossow <aek at
bitsavers.org> wrote:
Magnetorestrictive delay lines and a charactron.
http://bitsavers.org/pdf/rca/terminal/70_750/70-01-752-U_
Model_70_752_Video_Data_Terminal_Maintenance_Manual_Oct73.pdf
We got one (no keyboard) a couple days ago with the manual. I'm still
cleaning it up. It had something nesting in it and
the inside has sunflower seed husks in it. It was made with plastic DIP
ICs, no idea of the logic family. The keyboard
was made by IBM, don't know what character code it produces. Pretty funky
if it encodes ASCII.
That URL redirects to
http://www.mirrorservice.org/sites/www.bitsavers.org/pdf/rca/terminal/70_75…
, which is showing a 404.
--
Eric Christopherson
2882
days inactive
2882
days old
5 comments
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