If the patches I posted here a while back have been installed in the X server,
then the Xcfbpmax server will work for the mfb (at least it did way back when),
although I will also note that it wasn't extensively tested. (ie. I don't
know what it will do when you try to use colours other than black or white.)

You use the Xcfbpmax (and not the Xmfbpmax) since the MFB maps one pixel/byte
and looks the pixel value up in a colour map although only one bit of the
byte can be set and only black/white entries can be in the "colour map".

Good luck with it, rick
ps: The patch is necessary since the frame buffer is 2048x1024 where the first
    1240 bytes of each 2048 line are displayed (not 1024x816 contig displayed).