Chapter
6
BLITTER
HARDW"
ARE
Introduction
The
blitter is a high-performance graphics engine
that
uses up
to
four DMA channels.
The
operations
it
performs after a set-up of its registers are considerably faster than
those performed by the 68000.
The
blitter can be used for
data
copying.
It
includes
features
to
facilitate copying and processing of "rectangular" regions of memory. Typi-
cally, these regions are areas within graphics images.
The
blitter also does .line drawing.
The
process of performing a blitter operation
is
sometimes called a
blit.
Blitter Hardware
165