CODE 2DROP SP 4 ADDxi, ;CODE
CODE 2DUP
    AX POPx, BX POPx,
    BX PUSHx, AX PUSHx, BX PUSHx, AX PUSHx,
;CODE
CODE S0 AX PS_ADDR MOVxI, AX PUSHx, ;CODE
CODE 'S SP PUSHx, ;CODE
CODE AND AX POPx, BX POPx, AX BX ANDxx, AX PUSHx, ;CODE
CODE OR AX POPx, BX POPx, AX BX ORxx, AX PUSHx, ;CODE
CODE XOR AX POPx, BX POPx, AX BX XORxx, AX PUSHx, ;CODE
CODE NOT
    AX POPx, AX AX ORxx,
    IFNZ, AX -1 MOVxI, THEN, AX INCx, AX PUSHx,
;CODE