This register holds source x (x=A,B,C) data for
use by the blitter. It is normally loaded by the
blitter DMA channel; however, it may also be
preloaded by the microprocessor.
LINE DRAW BLTADAT is used as an index register
LINE DRAW and must be preloaded with 8000.
LINE DRAW BLTBDAT is used for texture; it must
LINE DRAW be preloaded with FF if no texture
LINE DRAW (solid line) is desired.
SEE ALSO: Blitter programming