/*** xga.c
*
* XGA - display a picture (series of pictures) in XGA mode
* on Sparrow
*
* xga {-s} {-i} {-n} file{.XGA}
*
* uses either VGA or ST Color monitor (based on switches @8006)
* on ST Color monitor, defaults to 640x200, interlaced
* use -n for 320x200
* use -i to DISABLE interlace
*
* after picture is displayed:
* 5 shows basic 5 bits-per-gun picture
* 4,3,2,1 shows a version of picture with specified number
* of bits-per-gun
* ENTER halts processor
*
* 91.11.05 atari!jtittsler
*
*/