I haven't tested the Nokia7110 for a long time, the reason for the shadowram is because you can't read a screen byte, with that controller.
You'll have to a play with it, I can't remember how far I got with it.
I think this will enable the Proton compiler drawing routines
GoTo GLCDSetPixel ; Your Routine
GoTo GlcdClearPixel ; Your Routine
I hope it still works.