Phoebus R. Dokos makes some magical things to make me read } A BGIMAGE type of command, with the difference that it will be able to } display on screen and at the point we want RLL encoded BMP files at all } colour depths (if it is 24bit of course it will be slow :-))
If it is for displaying picture, there is already photon available. It is a little bugged with mode 33/32 pic files, but has no problem with BMP.
