83h (with CF clear = 83 packed decimal) AL CF AF ; after addition 7Dh
I must say, I've never seen a dafter instruction spec. If you examine the table carefully, you will see that the effect of the instruction depends only on the C and H flags and the value in the accumulator -- it doesn't depend on the previous instruction at all. Also, it doesn't divulge what happens if, for example,
27 Nov 2014
This instruction assumes the AL register as the source and the destination, and hence it requires no operand. The effect of DAS (Decimal Adjust after Subtraction) instruction is similar to that of DAA, except that it is used after a subtraction instruction. For example in the following program, that NUM1 and NUM2 are decimal
2 Sep 2017
12 Apr 2017
Adjusts the sum of two packed BCD values to create a packed BCD result. The AL register is the implied source and destination operand. The DAA instruction is only useful when it follows an ADD instruction that adds (binary addi-tion) two 2-digit, packed BCD values and stores a byte result in the AL register.
Adjusts the sum of two packed BCD values to create a packed BCD result. The AL register is the implied source and destination operand. The DAA instruction is only useful when it follows an ADD instruction that adds (binary addition) two 2-digit, packed BCD values and stores a byte result in the AL register.

The DAA (Decimal Adjust Accumulator) instruction in the 8085 conditionally adds of mvi is to 8 bit data immidiatly to the register or memory example mvi b,05h. Example - AAA MOV AH,0. ,Clear AH for MSD MOV AL,6 ,BCD 6 in AL ADD AL,5 Instruction Description DAA. Instruction - Decimal Adjust Accumulator DAS.

Annons

The photo has no tags

February 2018