Re: Unicode support on VGA console.
H. Peter Anvin (hpa@transmeta.com)
4 Oct 1999 20:43:34 GMT
Followup to: <Pine.LNX.3.96.991004200428.17334A-101000@wizard.ae.krakow.pl>
By author: Jan Bobrowski <jb@wizard.ae.krakow.pl>
In newsgroup: linux.dev.kernel
>
> Attached demo shows technique that can overcome 256 character limit on the
> VGA console. Program manages visible glyphs so that limited is only number
> characters on screen, not the number of characters that can be displayed.
>
> Adding this mechanism to the kernel console driver is not easy because of
> its codepage nature (driver receives code number in current codepage,
> not the unicode). Even fb console has this limit.
>
> I am looking for somebody with kernel programming experience enough to add
> it to the console.
>
The limit is 512, not 256. Anyhow, it has been agreed that this
really takes too much kernel memory; and you'd be better off running a
frame buffer anyway. There really is no reason for the frame buffer
to have a limit below 2048; the 2048-character limit comes from the
width of the "direct to font" window (U+F000 to U+F7FF).
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
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