HP3000-L Archives

March 2004, Week 2

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Subject:
Re: Display Function Behavior on 3 Emulators
From:
John Clogg <[log in to unmask]>
Reply To:
John Clogg <[log in to unmask]>
Date:
Tue, 9 Mar 2004 10:02:06 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (179 lines) 
Tracy,
I must disagree with your definitions.  Back in the days before PCs, there was a class of terminals called "Smart" terminals.  These machines could implement some local logic, such as validation of input and reformatting of data.  Terminals which simply display and accept data without any such manipulation are called dumb terminals.  I believe the term was coined by Lear Siegler for their ADM series of terminals.  These terminals can do cursor addressing, etc.  The fact that HP terminals use proprietary commands for those functions doesn't make them less dumb, and some of the added features, such as block mode and display enhancements are still not enough to classify them as Smart terminals.  Some HP terminals, such as the 2647A, were programmable, and are therefore considered smart terminals.  The terminals that most HP terminal emulators emulate, such as the 700/94 are indeed dumb terminals.

-----Original Message-----
From: Tracy Pierce [mailto:[log in to unmask]]
Sent: March 09, 2004 9:08 AM
To: [log in to unmask]
Subject: Re: Display Function Behavior on 3 Emulators


> Just because I didn't spit out the exact model number you have to nitpick!
> I did say it was an "HP" dumb terminal...

Yes you did, and I'm touched that you see my correction as a nitpick, then
make the same mistake again.

A "dumb terminal" (which lookup via google) is simply that.  No magic, or
very little.  HPTerm on the other hand uses a very proprietary and quite
extensive system of controls for doing all sorts of magic, including
unprotected fields, display enhancement, etc etc.  But I guess you could
call it dumb because it doesn't show nulls in display functions mode, dumb!

They're quite opposite, and you seem quite touchy!

The exact model number _I_ spit out happens to be one that does do monitor
mode, what you need to see nulls on the screen.  You can also see them with
the old 256x printers; I think you use the very same escape sequence to turn
it on, too.  TerminalControlLanguage, that entity which includes sequences
to turn on blinking etc, developed (or should we say evolved?) alongside
PrinterControlLanguage, is the reason you see that HP logo on all those
laser printers.  Canon had a cool laser engine, and needed a way to talk to
it.  HP got so rich they forgot about their flagship computer.

You ask a real question here, you get a real answer, sometimes.

Tracy Pierce



> -----Original Message-----
> From: Johnson, Tracy [mailto:[log in to unmask]]
> Sent: Monday, March 08, 2004 11:21 AM
> To: [log in to unmask]
> Subject: Re: Display Function Behavior on 3 Emulators
>
>
> Just because I didn't spit out the exact model number
> you have to nitpick!  I did say it was an "HP" dumb
> terminal...
>
> BT
>
>
> Tracy Johnson
> MSI Schaevitz Sensors=20
>
> > -----Original Message-----
> > From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On
> > Behalf Of Tracy Pierce
> > Sent: Monday, March 08, 2004 1:16 PM
> > To: [log in to unmask]
> > Subject: Re: [HP3000-L] Display Function Behavior on 3 Emulators
> >=20
> >=20
> > "HP terminal" and "dumb terminal" are two different things,=20
> > dumb terminal
> > meaning "doesn't do squat except CR & LF", HP Terminal=20
> > meaning "knows HP
> > terminal control language", a collection of HP-exclusive=20
> > (mostly) responses
> > to escape sequences.
> >=20
> > But if your terminal is an HP 2645A, there's a button=20
> > labelled "display
> > functions", and there's a red pilot lamp indicating that it's=20
> > on.  If you do
> > control-display-functions (or something similar, sbeen a=20
> > while), you get
> > MonitorMode, which displays the nulls, and blinks the pilot lamp.
> >=20
> >=20
> >=20
> > > -----Original Message-----
> > > From: Johnson, Tracy [mailto:[log in to unmask]]
> > > Sent: Monday, March 08, 2004 8:57 AM
> > > To: [log in to unmask]
> > > Subject: Re: Display Function Behavior on 3 Emulators
> > >
> > >
> > > Oh and BTW, I went to a HP dumb terminal and got:
> > >
> > > LSSSC
> > > FXHXR
> > >
> > > Same as Reflection but without the s/e
> > >
> > > BT
> > >
> > >
> > > Tracy Johnson
> > > MSI Schaevitz Sensors=3D20
> > >
> > > > -----Original Message-----
> > > > From: HP-3000 Systems Discussion
> [mailto:[log in to unmask]]On
> > > > Behalf Of Johnson, Tracy
> > > > Sent: Monday, March 08, 2004 11:38 AM
> > > > To: [log in to unmask]
> > > > Subject: [HP3000-L] Display Function Behavior on 3 Emulators
> > > > Importance: Low
> > > >=3D20
> > > >=3D20
> > > > When using Display Functions on 3 HP terminal emulators
> I get=3D20
> > > > three differing results when displaying the same file. =3D20
> > > >=3D20
> > > > The file is IFILE.FDATABAS a MANMAN file record #1.  I'm using
> > > > two lines to represent non displayable characters to get my
> > > > point across.  Blanks are shown as blanks.
> > > >=3D20
> > > > Which is the proper representation? =3D20
> > > >=3D20
> > > > (I suppose I could have it display in Hex or Octal but that=3D20
> > > > would be too easy.)
> > > >=3D20
> > > > - - - - - - - - - - - - - - - - - - -
> > > >=3D20
> > > > Reflection 1 ver 5.20:
> > > >=3D20
> > > > LSSSSC
> > > > FXEHXR
> > > >=3D20
> > > > - - - - - - - - - - - - - - - - - - -
> > > >=3D20
> > > > Minisoft 92 ver 5.4:
> > > >=3D20
> > > > L S S    S C
> > > > F X H    X R
> > > >=3D20
> > > > - - - - - - - - - - - - - - - - - - -
> > > >=3D20
> > > > QCTerm 2.1:
> > > >=3D20
> > > > LNS"SNNNNSNC
> > > > FUX HUUUUXUR
> > > >=3D20
> > > > - - - - - - - - - - - - - - - - - - -
> > > >=3D20
> > > > BT
> > > >=3D20
> > > >=3D20
> > > > Tracy Johnson
> > > > MSI Schaevitz Sensors=3D20
> > > >=3D20
> > > > * To join/leave the list, search archives, change list
> settings, *
> > > > * etc., please visit
> http://raven.utc.edu/archives/hp3000-l.html *
> > > >=3D20
> > >
>
> > > * To join/leave the list, search archives, change list settings, *
> > > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
> > >
> >=20
> > * To join/leave the list, search archives, change list settings, *
> > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
> >=20
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
>

* To join/leave the list, search archives, change list settings, *
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