[ale] Rolling your own terminal emulator

[Van Loggins]

I'm interested in this too. I had posted a message from work yesterday
asking about how to go about creating a new terminal type to put in
the termcap file.

I'm having to hack together something since Rand Mcnally couldn't be
bothered to test their code for compatability when they ported their
milemaker software over to linux from Unix.

So far crt-vt220 is the most compatible, but I really need the
backspace key and the page up and down keys to work.

I'll be monitoring this thread for any bits of info I can glean about
understanding the control codes,etc. for terminals.

thanks,

Van


On Wed, 20 Oct 2004 00:25:52 -0400, Bob Toxen <bob at verysecurelinux.com> wrote:
> On Tue, Oct 19, 2004 at 11:34:13PM -0400, Christopher Fowler wrote:
> > RFC's on emulation.
> > You'll also need an understanding of the UNIX tty system.
> Oh, and if you're emulating more than straight text this will be a lot
> of work, days, weeks, or months.
> 
> Bob Toxen
> bob at verysecurelinux.com               [Please use for email to me]
> http://www.verysecurelinux.com        [Network&Linux/Unix security consulting]
> http://www.realworldlinuxsecurity.com [My book:"Real World Linux Security 2/e"]
> Quality Linux & UNIX security and SysAdmin & software consulting since 1990.
> 
> "Microsoft: Unsafe at any clock speed!"
>    -- Bob Toxen 10/03/2002
> 
> 
> 
> > On Tue, 2004-10-19 at 20:26, Greg Freemyer wrote:
> > > On Tue, 19 Oct 2004 15:38:36 -0400 (EDT), John Wells
> > > <lists at sourceillustrated.com> wrote:
> > > > Guys,
> > > >
> > > > We have a need to heavily modify a java terminal emulator.  While I
> > > > understand the GUI-specific code itself very well, I need to gain a better
> > > > understanding of the terminal code.
> > > >
> > > > I'm looking for a tutorial/document/book/site that describes how to write
> > > > a simple (or optionally complex) terminal emulator.  I understand it's
> > > > really just buffering input, sending across the wire, echoing characters
> > > > properly, etc, but there's also control characters to handle, positions to
> > > > write on the screen, and other items that are a bit more obscure as far as
> > > > I know.
> > > >
> > > > If you were to write your own terminal emulator, where would you begin?
> > > > What are the steps to terminal enlightenment?
> > > >
> > > > Thanks for the help, as always.
> > > >
> > > > John
> > > >
> > > The biggest issue I have seen is whether you need a page-based
> > > terminal function, or normal interactive function.
> > >
> > > The page-based (ie. 3270) are pretty poorly done, and very
> > > difficult/expensive, from what I have seen.
> > >
> > > If you just need VT100 like functionality (without its page mode), you
> > > should be able to find multiple to work with.  Is putty too complex?
> > > I think it has a pretty liberal license, but I;ve forgotten what it
> > > is.
> > >
> > > Greg
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> 


-- 
Van Loggins
"Linux Geek In Training"
vanloggins at gmail.com


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