MSM80C154S/83C154S/85C154HVS27829. DA A (Decimal adjust accumulator)1 1 0 1 0 1 0 07 0Instruction codeOperationsNumber of bytesNumber of cyclesFlags(PSW)Description: Byte 1101+6(C)←1:C AC F0 RS1 RS0 OV F1 P• •:::The arithmetic operation result located in the accumulatorfollowing an addition between two 2-digit decimal number isconverted to a normal decimal number. When the contents ofaccumulator bits 0 thru 3 (100 digit) are greater than 9, or whenthe auxiliary carry (AC) is 1, 6 is added to accumulator bits 0thru 3. And if the contents of accumulator bits 4 thru 7 (101 digit)exceed 9, or if the result obtained by adding a carry from thelower order digits after compensation is greater than 9, or if thecarry flag is 1, 6 is added to the data in accumulator bits 4 thru7. The flags are also updated.:11100+6←(AC)=1 or 100>10←(C)=1 or 101>10}
