> I'm interested in VGA mode 12h (640*480*16).
 > If anyone has any info on this mode I'd very much appreciate it.
 > C or ASM code would be useful.

What, specifically, do you want to be able to do?

Basically, it is a 16 colour (only) mode, 4 bits per pixel, but otherwise
linear without any of the bit-plane rubbish you have with EGA. The
algorithms that work in any other graphics mode work (sans routines dealing
with aspect ratios obviously) in this mode as well - just replace the
get/set pixel primitive as appropriate.

To access VGA memory beyond the 64K mark, you have to flip pages - but the
base primitive can take care of that as well, and the VGA BIOS services
work fine in mode 12H.

Although you get 16 colours (on the screen at once), you can still
reprogram the palette for different hues etc. as with the EGA.


 >  I'd prefer to use mode 12h because I want high resolution and I
 >  dont need that many colours. I'm working on and Asteroids/Xpilot clone.

Good luck.

  Regards,
  David

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