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From: ache@astral.msk.su (Andrew A. Chernov, Black Mage)
Newsgroups: comp.unix.bsd
Subject: [386bsd] Codrvr and national fonts, 9bit conflict with fix
Message-ID: <yJZMTThq70@astral.msk.su>
Date: 8 Feb 93 03:38:11 GMT
Sender: news-service@newcom.kiae.su
Reply-To: ache@astral.msk.su
Organization: Ha-oh-lahm Yetzirah
Lines: 28
Hi.
I found this problem using my russian screen fonts.
VGA controller extend 8th bit to 9th bit of character bitmap in range
0xC0 - 0xDF, making it the same as the 8th bit.
This is normally for smart pseudo-graphics placed in this codes by
default, but when I load my own font, here is russian letters,
witch looking ugly with 9th bit extension.
Here is small addition to function set_fontmap() in co_vga.c to disable this
unusable feature:
/* enable SB/SBH when font 1 is loaded */
if (pg==1 && data->encoding != NOFONT) outw(0x3c4,0x0403); /* SA=1,SB=0 */
> /* Clear 8bit --> 9bit char bitmap extention for national fonts */
> if (data->encoding != NOFONT) {
> inb(iobase+10);
> outb(0x3C0,0x20|0x10); i = inb(0x3C1);
> inb(iobase+10); /* use this instead of 250ns delay */
> outb(0x3C0,0x20|0x10); outb(0x3C0, i & ~0x4);
> }
return 0;
--
In-This-Life: Andrew A. Chernov | "Hay mas dicha, mas contento
Internet: ache@astral.msk.su | "Que adorar una hermosura
FIDOnet: 2:5020/23.34 | "Brujuleada entre los lejos
Organization: The RELCOM Corp. | "De lo imposible?!" (Calderon)