Re: Writing to TTY

[Alessandro Rubini <rubini pop systemy it>]

Kieran asked:
> Is it possible to write a program that can communicate with any tty and
> change the size of the characters displayed.

No, it is not possible. Not to "any tty", as the software side has no
notion of font-rendering (those "green screen dumb" you refer to are
only hooked to serial ports, the system doesn't even know what they
really are).

For the Linux console you can run SVGATextMode, which should be
included in most distributions; for Xterm use "control-mouse-1"
(control key and right mouse button at the same time) to be offered a
small font-changing menu. Unfortunately, SVGATextMode is not
completely trivial to setup and the xterm menu is written in its
default (small) font.

Hope this helps
/alessandro