5 May
2006
5 May
'06
8:23 p.m.
I had a DEC VT100 that was made around 1980 that would crash when you sent
it a certain escape sequence. You would have to power cycle the terminal to
recover. Newer units did not have this problem (this was around 1985). When
we discovered this we would send this sequence to peoples terminals to see
if they crashed.
I guess DEC did not get the terminal emulation correct at first.
Michael Holley
www.swtpc.com/mholley
All I can say is that I've had so many buygy PC
terminal emulators that
I'm darn glad to haev the real terminals still in operation. I remember
one so-called VT100 emulator for Windows (this would be about 10 years
ago) that gaev a very interesting display when used with EDT on a VMS
box...
When I was doing my Ph.D. I kept an old VT100 running (I had the
prints...) simply because it was a lot more reliable (in terms of getting
the emulation right) than any PC product.
-tony
5 May
5 May
11:23 p.m.
On 5/6/06, Michael Holley <swtpc6800 at comcast.net> wrote:
I had a DEC VT100 that was made around 1980 that would
crash when you sent
it a certain escape sequence. You would have to power cycle the terminal to
recover. Newer units did not have this problem (this was around 1985). When
we discovered this we would send this sequence to peoples terminals to see
if they crashed.
I guess DEC did not get the terminal emulation correct at first.
There are many known and well documented bugs with the VT100. The old
program 'vttest' is a good place to learn more (and to test your
emulator for bug-for-bug compatibility)
-ethan
11:31 p.m.
New subject: (VT100 bugs)
Michael wrote....
> I had a DEC VT100 that was made around 1980 that
would crash when you
> sent
> it a certain escape sequence.
I recall a terminal that could not position the cursor to a specific spot on
the screen (directly), because the control/escape sequence used a particular
sequence followed by a control character pair to designate a row/column to
go to, and row or column 19 decimal designated by control-S caused the
terminal to hold.... even if you did it in local mode from the keyboard :)
I can't remember if the terminal that has this problem was an old ADDS
viewpoint, or if it was one of the microterm ACT terminals. I do remember it
was fixed in a shortly released firmware upgrade.
I have an ADDS A2 I should try this out on. I also have two different models
of micro-term ACT units. By the way, did anyone see what a microterm "ACT I"
is going for on ebay? I should sell mine :)
Jay West
6652
days inactive
6652
days old
2 comments
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participants (3)
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ethan.dicks＠gmail.com -
jwest＠classiccmp.org -
swtpc6800＠comcast.net