12 Dec
2015
12 Dec
'15
5:17 p.m.
Sometime later, maybe around 1971 they got some IBM
2741 terminals which
were Selectric typewriters connected to an interface. 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 interactive,
great for quick program editing and submission.
Were 2260s really Zenith products inside? I certainly could believe
it, judging from the tube lineup. Someday I would like to see one up
close and personal.
The 1800 actually did have a video option, and yes, you had to provide
your own cheap black and white TV.
--
Will
12 Dec
12 Dec
5:25 p.m.
Until the advent of "personal" computers, a computer generally did not
have a screen. If you were doing stuff for which a creen would be useful,
you used a "peripheral" device, called a "terminal".
9:26 p.m.
On 12/12/2015 11:17 AM, William Donzelli wrote:
Yes, they were hideous hacks of a cheap TV set. The VHF
tuner was still in there, as it was needed to complete the
series filament chain. They had 5 tubes in series, with
26-volt filaments, running off 120 V AC. I'm PRETTY sure
the brand was Zenith, but this is from about a 43-year old
memory of pulling the cover off one. All it had was a
keypunch-style keyboard and the TV, all the electronics were
in the machine room.
Jon
Sometime
later, maybe around 1971 they got some IBM 2741 terminals which
were Selectric typewriters connected to an interface. 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 interactive,
great for quick program editing and submission.
Were 2260s really Zenith products
inside? I certainly could believe
it, judging from the tube lineup. Someday I would like to see one up
close and personal.
9:35 p.m.
On Dec 12, 2015, at 4:26 PM, Jon Elson <elson at
pico-systems.com> wrote:
On 12/12/2015 11:17 AM, William Donzelli wrote:
Yes, they were hideous hacks of a cheap TV set. The VHF tuner was still in
there, as it was needed to complete the series filament chain. They had 5 tubes in
series, with 26-volt filaments, running off 120 V AC. I'm PRETTY sure the brand was
Zenith, but this is from about a 43-year old memory of pulling the cover off one. All it
had was a keypunch-style keyboard and the TV, all the electronics were in the machine
room.
I thought 2260s had a green CRT.
paul
Sometime
later, maybe around 1971 they got some IBM 2741 terminals which
were Selectric typewriters connected to an interface. 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 interactive,
great for quick program editing and submission.
Were 2260s really Zenith products
inside? I certainly could believe
it, judging from the tube lineup. Someday I would like to see one up
close and personal.
13 Dec
13 Dec
4:46 a.m.
On 12/12/2015 11:17 AM, William Donzelli wrote:
Yes, they were hideous hacks of a cheap TV set. The VHF
tuner was still in there, as it was needed to complete the
series filament chain. They had 5 tubes in series, with
26-volt filaments, running off 120 V AC. I'm PRETTY sure
the brand was Zenith, but this is from about a 43-year old
memory of pulling the cover off one. All it had was a
keypunch-style keyboard and the TV, all the electronics were
in the machine room.
Jon
Sometime
later, maybe around 1971 they got some IBM 2741 terminals which
were Selectric typewriters connected to an interface. 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 interactive,
great for quick program editing and submission.
Were 2260s really Zenith products
inside? I certainly could believe
it, judging from the tube lineup. Someday I would like to see one up
close and personal.
3401
days inactive
3402
days old
4 comments
4 participants
participants (4)
-
cisin＠xenosoft.com -
elson＠pico-systems.com -
paulkoning＠comcast.net -
wdonzelli＠gmail.com