Quantum Data 801GC, 801GF, 801GX manual Persist

Persist

Description	In the primary version, 15 small white boxes move
	back and forth between diagonal guide lines. The
	lines form 15 side-by-side tracks. The size of each
	box is scaled to the light meter box size set by the
	MSIZ system parameter. The box in the center track
	moves one scan line vertically and one pixel
	horizontally for each vertical frame of refresh. The
	seven boxes in the tracks to the right of the center
	track move 2, 3, 4, 5, 6, 7 and 8 pixels and lines
	per frame. These boxes are marked 2X through
	8X at the bottom of the tracks. The seven boxes to
	the left of the center track move one scan line
	vertically and one pixel horizontally for every 2,
	3, 4, 5, 6, 7 and 8 vertical frames of refresh. These
	boxes are marked /2 through /8 at the bottom of
	the tracks.
	In cases where the next move would cause the
	box to move beyond the end of its track, it
	immediately reverses and moves the correct
	distance in the opposite direction for the next
	frame.
	A continuously running counter appears in the
	upper left-hand corner of the image. The number
	shown is the number of vertical frame refreshes
	that have occurred since the generator was first
	powered up.
	The secondary version draws a black image on a
	white background.

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