The following routine handles setup for non-wrapping pattern setup (such
as text): eddf_MESSSetUpPatDest11
The following routines handle setup for destination-only blts:
eddf_MESSSetUpDest16
eddf_MESSSetUpDest81
eddf_MESSSetUpDest24
eddf_MESSSetUpDest41
eddf_MESSSetUpDest11
The following routine handles common setup for 4-bit-per-pel pattern
blts:
eddf_MESSSetUpDestForPat41