Microprocessor

Assembly Level Language Programming

Needed files for assembly programming:

• Either use online emulators like sim8085, or

• Software links:

  • 8085 microprocessor emulator download link

  • 8086 microprocessor emulator download link

8085 Microprocessor

1. Data Transfer and Instruction Set

   • Load register with data

   • Load register with data and copy content of this memory location to register C

   • Load content of memory location to register

   • Store content of register to memory location

   • Input data from port address and out through port address

   • Display content of memory location into port address

   • Swap contents of register B and C

   • Swap contents of memory location

2. Arithmetic and Logical Instruction Set

   • Add content of one register and another register and store the result in next register

   • Subtract content of memory location 5000H from 5001H and store result in 5002H

   • Add 16-bit data from register pair B and D and store result at HL pair

   • Load 00H into register B and 10H into register C. Increment content of register B and Decrement content of register C. Store result at memory locations 4000H and 4001H

   • Load 16-bit data of register pair from another register pair and store result

   • Perform AND, OR and XOR operation between 51H and A2H. Store the AND result at 9000H, OR at 9001H and XOR at 9002H

   • Show masking of lower and higher nibbles of 8-bit number. Store the original number in 7007H, masked lower nibble in 7008H and masked upper nibble in 7009H

   • SET the D6, D1 and D0 bits of 8 bits data A8H and store the result in memory location 1010H

   • RESET the D4, D3, D2 and D0 bits of 8-bit data 3DH and store the result in register B

3. Branching Instruction Set

   • Add the content of 4004H and 4005H and store the result and carry in successive memory location

   • Add two 16 bit numbers with carry

   • Subtract the content of register C from register B and store the difference at register L and borrow at register H

   • Subtract with borrow

   • Create a continous loop using unconditional jump instruction

   • Test the Jump on Zero (JZ=1) condition on arithmetic operation

   • Test the Jump on Zero (JPE=1) condition on logical operation

   • Test the jump on negative (S=1) condition on arithmetic operation

4. Rotate Instruction Set

   • Rotate left the data byte A1H two times

   • Rotate right the data byte F1H three times

   • Rotate left with carry the result of addition (AAH+EEH) three times

   • Rotate right with carry the result of subtraction (DEH-FAH) two times

   • Load two data stored in memory location 8000 and 8001 directly to HL register. Add them. If carry exists, rotate right with carry the accumulator result three times, otherwise terminate

   • Convert the total number of 1 in given bit number

5. Multiply, Divide and Memory Block Operations

   • Multiply

   • Divide

   • Copy block of memory to another memory location

   • Swap memory blocks

   • Sort memory block in ascending order

   • Sort memory block in descending order

6. Subroutine, Stack and BCD Conversion

   • Factorial of a number using subroutine

   • Sum of squares of the first n numbers

   • Convert binary to BCD

   • Convert BCD to binary

   • Stack implementation and add data directly

   • Stack implementation and add data indirectly

   • Use of stack to reverse the number stored in a memory stack and store in the same memory block

8086 Microprocessor

1. Basic Arithmetic

   • Add two numbers, store the result at DX register and carry at CX register

   • Add two numbers, store the result at DL register and carry at CL register.

   • Subtract two numbers, store the result at DX register and borrow at CL register

   • Multiply

   • Divide

   • Take single character input from keyboard and display it on screen

   • Print your name without using data variable

   • Sort given numbers in ascending order

   • Separate odd and even numbers

2. String Processing

   • Check Palindrome

   • Display list of strings

   • Find position of character in string

   • Reverse String

Practice Programs for 8085 Microprocessor

• Ascending Sort

• Descending Sort

• Count the total number of 1 in given number

• Reverse the number stored in one block and store in another

• BCD to Binary conversion

Practice Programs for 8086 Microprocessor

• Add two 16 bit number

• Display string on the screen

• Read the string and check whether they are same or not

• Print data without Data variable