551CHAPTER 27 INSTRUCTION SET27.1.2 Description of “operation” columnA : A register; 8-bit accumulatorX : X registerB : B registerC : C registerD : D registerE : E registerH : H registerL : L registerAX : AX register pair; 16-bit accumulatorBC : BC register pairDE : DE register pairHL : HL register pairPC : Program counterSP : Stack pointerPSW : Program status wordCY : Carry flagAC : Auxiliary carry flagZ : Zero flagRBS : Register bank select flagIE : Interrupt request enable flagNMIS : Non-maskable interrupt servicing flag( ) : Memory contents indicated by address or register contents in parentheses×H , ×L : Higher 8 bits and lower 8 bits of 16-bit register: Logical product (AND): Logical sum (OR): Exclusive logical sum (exclusive OR)—— : Inverted dataaddr16 : 16-bit immediate data or labeljdisp8 : Signed 8-bit data (displacement value)27.1.3 Description of “flag” column(Blank) : Not affected0 : Cleared to 01 : Set to 1× : Set/cleared according to the resultR : Previously saved value is restored
