Sat Nov 5 13:18:19 EDT 2011

hex printing

So emit can do strings, but it's probably best to allow a hex printing
mode also to avoid having to waste much time on the PIC for trace

Actually, it's already there.
I changed the encoding so row/plain is just one bit: FC FD.

Maybe this should be changed however, to use one extra byte and use
only the #xFF address for host calls, instead of encoding host calls
in the host address space.