HP PCL/PJL reference (PCL 5 Color) - Technical Reference Manual

7-8 Color Vector Graphics (HP-GL/2) EN
Note When using the MC command, some pattern types will not produce
the expected ROP result. This only occurs when using the FT (Fill
Type) command pattern types 1, 2, 3, and 4, and when the ROP
includes an XOR operation. (This problem is due to the fact that these
patterns are the result of a vector operation and do not produce raster
data for use by a ROP operation.) All other Fill Type command
patterns (types, 10, 11, 21, or 22) operate as expected.
The MC command supports all 255 Microsoft Windows ROPS, which
are listed on the following page in reverse polish notation (RPN) using
the abbreviation listed above (D for Destination, S for Source, etc.).
Note See “Logical Operation Command” in Chapter 5 for usage and ROP
selection information.