Wrong. EXX does not switch AF with AF', and EX can only be used to switch AF and AF'. The others (BC, DE and HL) must be switched by EXX, and all at the same time. > Read the earlier posts about shadow registers. > EXX will switch all of the register with their shadows while you can do EX > AF,AF' and it will switch indivudally. > It can srot of be used as a push and pop but for all the regs.