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SubjectRe: How is 8-bit character support enabled for the TTY driver

Peter,

Long time no hear. Nice to hear from you again. Alan pointed me in the
the right direction with ncurses so that it's platform neutral and runs
across al terminals.

Your friend,

Jeff


"H. Peter Anvin" wrote:
>
> Followup to: <384D6492.4683238A@timpanogas.com>
> By author: "Jeff V. Merkey" <jmerkey@timpanogas.com>
> In newsgroup: linux.dev.kernel
> >
> > Whomever owns the TTY drivers, how do you turn the damn thing on to
> > allow you to display characters above 127? I am using the ncurses lib
> > for building our nwfs utils with a CWorthy look and feel menuing
> > interface, along with some management tools, and I cannot get characters
> > aove 127 to display. If I use the VCS interface, then I can get it to
> > work properly, but VCS screens cannot be accessed from remote terminals
> > on other systems. I realize the expanding beyond 7 bits on the terminal
> > display may not work on some terminals, but who gives a damn? Linux was
> > a PC operating system, so this should be supported, and I only care
> > about it working on Linux for the ncurses versions of the tools. There
> > is also a text based version of the tools that will work on everything,
> > even 7 bit terminal, but we want to put out some fancier tools for folks
> > with Linux, DOS, NT, etc.
> >
>
> Careful! First of all, there are no guarantees that the entire CP437
> font is present (after all, it isn't even on many PCs, and the PC font
> lacks a lot of *useful* characters); second, lots of people spend most
> of their time in X anyhow.
>
> Anyway, you can use the ncurses interface (recommended), or you can
> use the escape sequences from /usr/src/linux/Documentation/unicode.txt
> to switch between Latin-1, VT100, IBM Code Page 437, and "everything
> else". The last is a huge wart in the console driver IMNSHO; the
> obvious solution would be to make it ISO 2022 compliant, but
> unfortunately that's impossible to do in a backwards compatible manner
> :(
>
> There is also UTF-8 mode, initiated with ESC % G. Then you can issue
> Unicode UTF-8 sequences for whatever character you dang well please.
>
> -hpa
> --
> <hpa@transmeta.com> at work, <hpa@zytor.com> in private!
> "Unix gives you enough rope to shoot yourself in the foot."
>
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