dosemu-devel

[Dosemu-devel] Non-bolded display of second VGA font bank?

[Edward M. <em...@co...>]

Hello,

I wonder if there is any possibility of fixing a minor problem in 
DOSEMU? WordPerfect for DOS (and I believe some other applications) has 
an option to use a 512-character VGA font, using a second "bank" for the 
second font; this second bank seems to replace the bold font available 
for normal VGA.

DOSEMU can display this second bank (i.e., it can display 512 
character), but the "upper" 256 characters display in bold. For an 
illustration of the problem, please see this post on the DOSBox forum, 
where DOSBox displays exactly the same problem that DOSEMU displays:

http://vogons.zetafleet.com/viewtopic.php?t=26731

As you can see from the screen shots, VirtualPC displays the 
512-character font correctly. The illustration that I posted for DOSBox 
shows the behavior also shown by DOSEMU.

Is there any possibility of fixing this?

Thank you!

Edward Mendelson
Contributing Editor
PC Magazine

Re: [Dosemu-devel] Non-bolded display of second VGA font bank?

[Stas S. <st...@li...>]

15.04.2012 22:57, Edward Mendelson wrote:
> Hello,
>
> I wonder if there is any possibility of fixing a minor problem in
> DOSEMU? WordPerfect for DOS (and I believe some other applications) has
> an option to use a 512-character VGA font, using a second "bank" for the
> second font; this second bank seems to replace the bold font available
> for normal VGA.
>
> DOSEMU can display this second bank (i.e., it can display 512
> character), but the "upper" 256 characters display in bold. For an
> illustration of the problem, please see this post on the DOSBox forum,
> where DOSBox displays exactly the same problem that DOSEMU displays:
>
> http://vogons.zetafleet.com/viewtopic.php?t=26731
Very interesting finding, could you please open a bug about this
so it wont get lost.

Re: [Dosemu-devel] Non-bolded display of second VGA font bank?

[Edward M. <em...@co...>]

Thank you! I've posted a very detailed bug report on the Sourceforge page.

Best wishes,

Edward Mendelson
Contributing Editor
PC Magazine


On 4/23/2012 2:09 AM, Stas Sergeev wrote:
> I wonder if there is any possibility of fixing a minor problem in
> DOSEMU? WordPerfect for DOS (and I believe some other applications) has
> an option to use a 512-character VGA font, using a second "bank" for the
> second font; this second bank seems to replace the bold font available
> for normal VGA.
>
> DOSEMU can display this second bank (i.e., it can display 512
> character), but the "upper" 256 characters display in bold. For an
> illustration of the problem, please see this post on the DOSBox forum,
> where DOSBox displays exactly the same problem that DOSEMU displays:
>
> http://vogons.zetafleet.com/viewtopic.php?t=26731 

Re: [Dosemu-devel] Non-bolded display of second VGA font bank?

[Bart O. <bar...@us...>]

Hi,

I fixed your problem in the git repository. In the end what needed to
be changed is
#define ATTR_FG(attr) (attr & 0x0F)
in src/include/video.h to:
#define ATTR_FG(attrib) (attrib & 0x0F & vga.attr.data[0x12])
I also moved it to vgatext.h, but that's not necessary if you just
want to test it.

The attributes are not fixed for "dosemu -t" but this is not really a
problem since terminal mode can't display 512 characters at the same
time (there $_internal_char_set fixes the font, similar to dosemu -X
with $_X_font set).

Bart

Re: [Dosemu-devel] Non-bolded display of second VGA font bank?

[Edward M. <em...@co...>]

That was quick! Thank you! I'm away from my Linux box for a few days, but I'll try to build and test when I get back. (I admit that I have no experience building dosemu, but I think I can figure it out…)

Thanks again. I hope this is useful for other people too!

Best wishes,

Edward 

On 25 Apr 2012, at 8:56 PM, Bart Oldeman wrote:

> Hi,
> 
> I fixed your problem in the git repository. In the end what needed to
> be changed is
> #define ATTR_FG(attr) (attr & 0x0F)
> in src/include/video.h to:
> #define ATTR_FG(attrib) (attrib & 0x0F & vga.attr.data[0x12])
> I also moved it to vgatext.h, but that's not necessary if you just
> want to test it.
> 
> The attributes are not fixed for "dosemu -t" but this is not really a
> problem since terminal mode can't display 512 characters at the same
> time (there $_internal_char_set fixes the font, similar to dosemu -X
> with $_X_font set).
> 
> Bart
>