64 char print - 32 lines version

[britlion]

I did look into this, and I might well implement something someday. It's far harder than 4x8, however - 4 pixels is half a character square, and 8 is a full one, so it maps two new characters to a ZX Spectrum character square cleanly. 6 pixels high changes the start point of all the rows quite significantly; so it's a much harder thing to do.