From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: to del a window ...
Organization:	Pin Eight Software http://pineight.8m.com/
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NNTP-Posting-Date:	Sat, 22 Jul 2000 22:49:04 GMT
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Date:	Sat, 22 Jul 2000 22:49:04 GMT
To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

On Sat, 22 Jul 2000 13:07:29 +0100, Jason Green
<news AT jgreen4 DOT fsnet DOT co DOT uk> wrote:

>void set_video_mode(int mode)
>{
>  __dpmi_regs regs;
>  regs.x.ax = mode & 0xFF;
>  __dpmi_int(0x10, &regs);
>}
>
>If you cycle through possible values of mode and use conio functions
>to get the screen dimensions you will probably find all sorts of weird
>text modes that your card is capable of.  Some modes will cause
>lock-ups, so it's best to log the results to a file and open/close it
>between each mode switch, and be prepared for reboots.

I don't think users will be prepared for reboots.

>However, there is one mode that would be a useful addition to DJGPP,
>if someone could work out how to implement it.  80x60 chars is listed
>in the Linux LILO docs as one of the standard VGA text modes and is
>achieved using a 640x480 pixel variation of the 80x50 char text mode
>(normally 640x400 pixels).

Try 80x50 mode with the 640x480 mode's vertical timing values.
Look up 

>Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> wrote:
>
>> I know 80x117 can be done with EGA and standard VGA (go to 350
>> scanline text mode and knock the character height down to 3
>> scanlines).
>
>Out of interest, what possible use is a 3 pixel high font?

Splitting each character in half horizontally with character 222 gives
a 160x117 pseudo-graphical mode with square pixels.

>Does the DOS command line behave itself if you switch to this mode?

I switch back to 80x25 or 80x50 on close; it doesn't matter.

-- 
Damian Yerrick
"I refuse to listen to those who refuse to listen to reason."
See the whole sig: http://www.rose-hulman.edu/~yerricde/sig.html

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