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Symbolic target words

Instead of using a bunch of codes, it's probably simplest to call host
code using symbolic names, and using the same approach as those
(non-parsing) words run from the command line.

What this needs is the following interface:

>h h>                 move words to host stack
#xFE [ <char> ... ]   execute target word

Maybe all RPC code should drop into interpreter?
EDIT: done, looks better.

Next: where is the live: state stored (stack)?
grep for "state:stack" in staapl/staapl/live

./rpn-target.ss:85:  (void ((target: code ...) (state:stack))))

So it looks like I need to open up this one:

(define-syntax-rule (target> code ...)
  (void ((target: code ...) (state:stack))))

Is it target: or live: ?


reflection.ss `run' delegates to `forth-command' defined in
rpn.target.ss in terms of `target:' to interprete commands.  So do we
want the target to have acess to that or only the `live:' set?

The namespace used by 'live:' is defined by `live-interpret' in
rpn-live.ss, and it will take words from the (scat) namespace but
delegate to scheme usoing `scat-wrap-dynamic'.

EDIT: Actually, this should probably be `target-interpret' instead of
`live-interpret'.

That works, but it creates loops: `target-interpret' gives preference
to target words, so this needs to be broken.

I don't see how to fix it.  `kb' is a 1cmd: in the (target)
dictionary, which is implemented as a prefix parser.

so "kb" -> "t> kb", where 'kb' is then interpreted in (target) which
delegates to target word.

Maybe this needs a more systematic approach.  Instead of delegating to
host commands from .f code, make it so that all host commands are
accessible on the target.



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