20 Jan
2006
20 Jan
'06
7:17 p.m.
<http://www.rdrop.com/~jimw/jcgm-io.shtml#IO%20Devices> drops this
phrase in the discussion of add-ons to the Heathkit H-19 video
terminal.
Just what were "the well known plotting bugs of the original 4010"?
Since I have a 4010, I'm keen to know :-)
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
20 Jan
20 Jan
7:47 p.m.
Richard <legalize at xmission.com> wrote:
<http://www.rdrop.com/~jimw/jcgm-io.shtml#IO%20Devices> drops this
phrase in the discussion of add-ons to the Heathkit H-19 video
terminal.
Just what were "the well known plotting bugs of the original 4010"?
Since I have a 4010, I'm keen to know :-)
The necessary delay between doing an erase and starting
to draw again (a second or two), or the bright blink when you erase?
You can only erase the entire screen?
Overwrite doesn't replace a character, but actually just draws
over it leaving the old character behind?
Lack of scrolling ability?
Funny things happen if you send graphics coordinates too fast
(making the "short mode addressing" useless at high speeds?)
Didn't it also use RC networks for the serial clock, and there
was a pot to tweak? That was the thing that struck me as being
really chintzy at the time, but there was that pot for rubbering
the frequency...
GIN mode? (And the other GIN mode?) And the funny characters that
could come out that some minicomputer OS's just did not get along with?
Of course, to you and me these are just intrinsic characteristics
of a 4010, but to someone who grew up with non-storage-scope
CRT's they probably could be frustrating.
Tim.
9:11 p.m.
In article <20060121004730.7C243BA4848 at mini-me.trailing-edge.com>,
shoppa_classiccmp at trailing-edge.com (Tim Shoppa) writes:
The necessary delay between doing an erase and
starting
to draw again (a second or two), or the bright blink when you erase?
You can only erase the entire screen?
Overwrite doesn't replace a character, but actually just draws
over it leaving the old character behind?
Lack of scrolling ability?
I wouldn't characterize these as bugs - they are in the nature of the
storage scope technology.
Using that reasoning, you could say that raster graphics has the "bug"
that lines are aliased.
Funny things happen if you send graphics coordinates
too fast
(making the "short mode addressing" useless at high speeds?)
Now this starts sounding more like a bug. What "funny things" happen?
Didn't it also use RC networks for the serial
clock, and there
was a pot to tweak? That was the thing that struck me as being
really chintzy at the time, but there was that pot for rubbering
the frequency...
This doesn't sound like a "plotting bug" either, just something you
didn't like :-)
GIN mode? (And the other GIN mode?) And the funny
characters that
could come out that some minicomputer OS's just did not get along with?
Can you elaborate on this? IIRC, GIN mode is where you used the
crosshairs to indicate x,y position and then pressed RETURN or
something to send the position back up the serial line, right? What
do you mean by "the other GIN mode"?
Of course, to you and me these are just intrinsic
characteristics
of a 4010, but to someone who grew up with non-storage-scope
CRT's they probably could be frustrating.
Well, this quote was taken from a page showcasing a vintage computer
collection, so its not like the guy is unfamiliar with old tech.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
9:23 p.m.
In article <20060121004730.7C243BA4848 at
mini-me.trailing-edge.com>,
shoppa_classiccmp at trailing-edge.com (Tim Shoppa) writes:
> The necessary delay between doing an erase and starting
> to draw again (a second or two), or the bright blink when you erase?
>
> You can only erase the entire screen?
>
> Overwrite doesn't replace a character, but actually just draws
> over it leaving the old character behind?
>
> Lack of scrolling ability?
I'll say this--that, for the time, these had the most readable displays of
any CRT technology. Did the 4010 have the "split screen" capability of
being able to erase only half the screen?
Cheers,
Chuck
9:36 p.m.
In article <200601201823360025.117B2087 at 10.0.0.252>,
"Chuck Guzis" <cclist at sydex.com> writes:
I'll say this--that, for the time, these had the
most readable displays of
any CRT technology. Did the 4010 have the "split screen" capability of
being able to erase only half the screen?
Nope. Neither does the 4014, which is basically just a 4010 with a
larger display and slightly updated electronics AFAICT.
I never heard of a split-screen erase on the storage scope displays,
but I only ever saw the 4010 in person until I got my 4014 about a
year or two ago :)
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
10:08 p.m.
On 1/20/2006 at 7:36 PM Richard wrote:
I never heard of a split-screen erase on the storage
scope displays,
but I only ever saw the 4010 in person until I got my 4014 about a
year or two ago :)
Well, this was 30+ years ago. I'm not aware that the terminal could
display anything but alphanumerics, nor that it was a Tek. I do remember
that it was comparatively large (maybe 17"?) and that either the right or
the left side could be erased. FWIW, I never saw another one.
For a while, I had a 564 scope. IIRC either the top or bottom could be
erased.
Cheers,
Chuck
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