CODE 0 AX AX XORxx, AX PUSHx, ;CODE
CODE 1 AX 1 MOVxI, AX PUSHx, ;CODE
CODE 1+ DI SP MOVxx, [DI] INC[w], ;CODE
CODE 1- DI SP MOVxx, [DI] DEC[w], ;CODE
CODE EMIT
    AX POPx, AH 0x0e MOVri, ( print char ) 0x10 INT,
;CODE
: BOOT 4 5 CMP '=' + EMIT ;