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- From: terry@cs.weber.edu (A Wizard of Earth C)
- Subject: Re: 386bsd: 16550, color, vt100
- Message-ID: <1992Aug21.171825.18744@fcom.cc.utah.edu>
- Sender: news@fcom.cc.utah.edu
- Organization: Weber State University (Ogden, UT)
- References: <sand.714341461@milton> <1992Aug20.222741.9968@ugle.unit.no> <veit.714391213@du9ds3>
- Date: Fri, 21 Aug 92 17:18:25 GMT
- Lines: 58
-
- In article <veit.714391213@du9ds3> veit@du9ds3.uni-duisburg.de writes:
- >In <1992Aug20.222741.9968@ugle.unit.no> arnej@Lise.Unit.NO (Arne Henrik Juul) writes:
- >[...]
- >>The sequence: ESC [ 3 ; <number> x
- >>means: set the PC color mode to <number>, where <number> will be used
- >>in this way:
- >
- >Warning: this is incompatible with vt100. A vt100 emits an identification
- >string with ESC [ x, which may cause much problems.
-
- A vt100 ignores ANSI sequences which are not vt100 commands. I think you
- are confusing which direction the escape sequence is going.
-
- Also, unless you disable the 25th line or make it a status line, you are
- going to have a hell of a time convincing some poor computer that the
- thing you are talking to it from is a vt100. Specifically, it will scroll
- one line later than it whould.
-
- Those with laptops especially, and the Epson Equity series in particular,
- should note that there is a bug in the video BIOS that prevents scrolling
- of a portion of the screen from tuning out "quite right". You will have
- to work around this problemon those boxes.
-
- Also a true vt100 will fail under the "resize" command, which moves the
- cursor to row 999, column 999, and expects the cursor to be placed in
- the lower right-hand corner. If the actual screen size makes a positioning
- sequence out of bounds, a real vt100 does not move the cursor.
-
- I would suggest some other emulation which fits the bill, the best I have
- seen being the SCO color console, since it allows you to paint lines, etc.
- in a particular color. ISC's console only allows characters actually
- drawn on the screen to be colored, which is somewhat bogus (BG color on
- lines scrolled up the screen is set to black unless drwan over).
-
- Then make sure that what ever you are talking to has a termcap or terminfo
- uploaded. If you do this, even a "Joe Cheese" terminal emulation will
- work.
-
- One big plus is that the SCO color console hase insert/delete line/char,
- which will keep elVIs from behaving erratically (deletion of line causes
- blank line on screen).
-
- If you have your heart set on some DEC terminal, the VT102P has the ability
- to support multiple simultaneous attributes, and supports the insert and
- delete functions to make elVIs happy, so I would suggest that instead.
-
-
- Terry Lambert
- terry_lambert@gateway.novell.com
- terry@icarus.weber.edu
- ---
- Any opinions in this posting are my own and not those of my present
- or previous employers.
- --
- -------------------------------------------------------------------------------
- terry@icarus.weber.edu
- "I have an 8 user poetic license" - me
- -------------------------------------------------------------------------------
-