[Qemu-devel] VGA font problem (FC2 install)

[Qemu-devel] VGA font problem (FC2 install)

[Daniel Serpell]

When trying to install Fedora Core 2, the instalation switches the
text font and text becomes unreadable, so it's difficult to continue.

Browsing at http://osdev.neopages.net/FreeVGA/vga/vgatext.htm#fonts
they describe the following:

  " If bit 3 of a character's attribute byte is set to 1, then
    the character set selected by Character Set A Select field,
    otherwise the character set specified by Character Set B
    Select field is used. "

But current code in QEMU is the oposite. So, I changed it with the
patch below, and FC2 installed!


Index: hw/vga.c
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/vga.c,v
retrieving revision 1.26
diff -u -r1.26 vga.c
--- hw/vga.c    29 Apr 2004 19:21:16 -0000      1.26
+++ hw/vga.c    19 May 2004 22:21:49 -0000
@@ -1228,7 +1228,7 @@
                 ch = ch_attr & 0xff;
                 cattr = ch_attr >> 8;
 #endif
-                font_ptr = font_base[(cattr >> 3) & 1];
+                font_ptr = font_base[1 - ((cattr >> 3) & 1)];
                 font_ptr += 32 * 4 * ch;
                 bgcol = palette[cattr >> 4];
                 fgcol = palette[cattr & 0x0f];


    Daniel.

Re: [Qemu-devel] VGA font problem (FC2 install)

[Lennert Buytenhek]

Just to say "me too!", I had this problem as well, and I just tried
latest CVS and it doesn't happen anymore.


On Wed, May 19, 2004 at 06:37:16PM -0400, Daniel Serpell wrote:

> When trying to install Fedora Core 2, the instalation switches the
> text font and text becomes unreadable, so it's difficult to continue.
> 
> Browsing at http://osdev.neopages.net/FreeVGA/vga/vgatext.htm#fonts
> they describe the following:
> 
>   " If bit 3 of a character's attribute byte is set to 1, then
>     the character set selected by Character Set A Select field,
>     otherwise the character set specified by Character Set B
>     Select field is used. "
> 
> But current code in QEMU is the oposite. So, I changed it with the
> patch below, and FC2 installed!
> 
> [snip]
>