Why can the machine code equivalent of the $$mov Wnd$,$ f$$ instruction only encode fifteen of the sixteen $5$

bits in the instruction?

$2.$ Write a PIC$24$ instruction sequence that copies data RAM locations $0$x$1000$ thorugh $0$x$1007(8$ bytes$)10$

to locations $0$x$1800$ through $0$x$1807.$ Do not use any branching or jumping instructions.

$3.$ Write a PIC$24$ assembly language equivalent for the following C code fragment. Assume variables u$16\_$i$,10$

u$16\_$j$,$ and u$16\_$k are uint$16\_$t variables.

u$16\_$i $=(($ u$16\_$k $$ u$16\_$j $)<<4)$ & $0$x$0$F ;