( native words )
CODE >R
    BP INCx, BP INCx, [BP] 0 POP[w]+,
;CODE NOP, NOP, NOP,
CODE R>
    [BP] 0 PUSH[w]+, BP DECx, BP DECx,
;CODE
CODE 2R>
    [BP] -2 PUSH[w]+, [BP] 0 PUSH[w]+, BP 4 SUBxi,
;CODE
CODE I [BP] 0 PUSH[w]+, ;CODE
CODE 1+ DI SP MOVxx, [DI] INC[w], ;CODE
CODE 1- DI SP MOVxx, [DI] DEC[w], ;CODE