Address Name Description
DFF044 BLTAFWM Blitter first word mask for source A
DFF046 BLTALWM Blitter last word mask for source A


The patterns in the two registers are "anded" with the first and
last words of each line of data from Source A into the Blitter.
A zero in any bit overrides data from Source A. These registers
should be set to all "ones" for fill mode or for line drawing mode.

This material is most likely derived from the official Amiga documentation and where applicable copyright remains with the original author.