Go4Expert - 8085 Assembly language programming code for beginners

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8085 Assembly language programming code for beginners

Addition of two 8 bit numbers.

Code:

   MVI B, 06

   //Load Register B with the Hex value 06

   MOV A, B

   //Move the value in B to the Accumulator or register A

   MVI C, 07

   //Load the Register C with the second number 07

   ADD C

   //Add the content of the Accumulator to the Register C

   STA 8200

   //Store the output at a memory location e.g. 8200

   HLT

   //Stop the program execution

Addition of two 8 bit numbers stored in memory

Code:

   LDA 8500

   //Load the accumulator with the address of memory viz 8500

   MOV B, A

   Move the accumulator value to the register B

   LDA 8501

   //Load the accumulator with the address of memory viz 8501

   ADD B

   //Add the content of the Accumulator to the Register B

   STA 8502

   //Store the output at a memory location e.g. 8502

   HLT

   //Stop the program execution

Addition of two 8 bit numbers stored in memory and storing the carry

Code:

   LDA 8500

   //Load the accumulator with the address of memory viz 8500

   MOV B, A

   Move the accumulator value to the register B

   LDA 8501

   //Load the accumulator with the address of memory viz 8501

   ADD B

   //Add the content of the Accumulator to the Register B

   STA 8502

   //Store the output at a memory location e.g. 8502

   MVI A, 00

   //clear the accumulator with 00

   ADC A

   //Add with carry the content of the accumulator

   STA 8503

   //Store the output at a memory location e.g. 8503

   HLT

   //Stop the program execution

Implementing the above program for the subtraction is very simple just replace ADD with SUB and ADC with SBB and all should be working fine.