CSIT_Labs

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