MICROPROCESSOR LAB MANUAL              July 20, 2017 
                Hetauda City College 
                   Affiliated to Tribhuwan University 
                                
                                
                                
                                
                                
                                
                     LAB MANUAL 
                             ON 
                  8085 MICROPROCESSOR 
                    BSC-CSIT: II SEM 
                                
                                
                                
                                
                                
                                
                                
                           Prepared By: 
                         Sulav Paudel (MSc) 
                            Lecturer  
    1                  
    
        S. PAUDEL. MSc | LECTURER, DEPARTMENT OF INFORMATION TECHNOLOGY (BSC CSIT) 
         
                 MICROPROCESSOR LAB MANUAL                                                              July 20, 2017 
                 PERFORM  ALL  PROGRAMS  AND  PREPARE  THE  LAB  REPORT  INCLUDING  OBJECTIVE, 
                 ALGORITHMS, PROGRAMS, OBSERVATION AND RESULT OR COMCLUSION 
                                                                LAB 1 
                 1.1  STORE 8-BIT DATA IN MEMORY LOCATION 
                 AIM: To perform the 8085 assembly program to store 8-bit data 2AH in a memory location 
                 8050H. 
                 ALGORITHM 1: 
                        Start the program by loading the first data into an accumulator. 
                        Store accumulator contents at given memory address. 
                        Terminate program. 
                 PROGRAM 1: 
                       MVI A, 2AH 
                       STA 8050H 
                       HLT 
                 ALGORITHM 2: 
                        Start the program by loading the first data into an accumulator. 
                        Load HL pair register with given memory address. 
                        Store accumulator contents in memory location pointed by HL register pair. 
                        Terminate program. 
                          
                 PROGRAM 2: 
                       LXI H, 8050H 
                       MVI M, 2AH 
                       HLT 
                 1.2  EXCHANGE THE CONTENTS OF MEMORY LOCATIONS 
                 AIM: To perform the 8085 assembly program exchange the contents of memory locations 
                 5000H and 4000H. 
                 ALGORITHM 1: 
                        Start  the  program  by  loading  the  first  data  of  memory  location  4000H  into 
                         accumulator. 
                        Move the data to a register (B register). 
                        Load the second data of memory location 5000H into accumulator. 
                        Store the data of accumulator at address 4000H 
                        Move the data back into accumulator that is saved in a register (B register). 
         2              Store the data of accumulator at address 5000H 
                        Terminate program. 
                                                   
                 S. PAUDEL. MSc | LECTURER, DEPARTMENT OF INFORMATION TECHNOLOGY (BSC CSIT) 
                  
                 MICROPROCESSOR LAB MANUAL                                                              July 20, 2017 
                 PROGRAM 1: 
                       LDA 4000H 
                       MOV B, A 
                       LDA 5000H 
                       STA 4000H 
                       MOV A, B 
                       STA 5000H 
                       HLT 
                 ALGORITHM 2: 
                        Start the program by initializing register pair (HL) as a pointer to memory location 
                         4000H. 
                        Initializing register pair (DE) as a pointer to a memory location 5000H. 
                        Move the data of memory location 4000H into a register (B register). 
                        Move the data of memory location 5000H into an accumulator. 
                        Move the data of accumulator into memory location pointed by register pair (HL). 
                        Move the data from register (B) into accumulator. 
                        Store the data of accumulator into memory location pointed by register pair (DE). 
                        Terminate program. 
                          
                 PROGRAM 2: 
                       LXI H, 4000H 
                       LXI D, 5000H 
                       MOV B, M 
                       LDAX D 
                       MOV M, A 
                       MOV A, B 
                       STAX D 
                       HLT 
                                                   
         3 
      
                 S. PAUDEL. MSc | LECTURER, DEPARTMENT OF INFORMATION TECHNOLOGY (BSC CSIT) 
                  
              MICROPROCESSOR LAB MANUAL                                                July 20, 2017 
              PERFORM  ALL  PROGRAMS  AND  PREPARE  THE  LAB  REPORT  INCLUDING  OBJECTIVE, 
              ALGORITHMS, PROGRAMS, OBSERVATION AND RESULT OR COMCLUSION 
                                         LAB 2: Use 8085 KIT (MPS 85-3) 
              RAM USAGE 
              The system monitor utilizes RAM locations 8F90H to 8FFFH for Storing the System Stack 
              and  variables.  User  programs  should  not  disturb  this  area;  otherwise  the  results  are 
              unpredictable. 
              2.1  EXAMINE/MODIFY MEMORY COMMAND 
                     FUNCTION: This command is used to examine the contents of selected memory 
                      locations.  The  contents  can  be  optionally  modified  if  the  memory  location  is  in 
                      RAM area. 
                     FORMAT: EXAM MEM 
 NEXT [[] NEXT/PREV]* [EXEC] 
              Example 1: Examining a series of memory locations starting from 0000H (the start of the 
              keyboard monitor). 
                  Key Pressed                     Display                        Comments 
                                     Address Field        Data Field 
              RESET                 -UPS              85                 System Reset 
              EXAM MEM              .                                    Examine Memory command 
              0                     0000                                 First memory location to be 
                                                                         examined 0000H 
              NEXT                  0000              F3                 Contents of this location. 
              NEXT                  0001              3E                 Next    location  and    its 
                                                                         contents. 
              NEXT                  0002              0F                 Next    location  and    its 
                                                                         contents. 
              PREV                  0001              3E                 Previous  location  and  its 
                                                                         contents. 
              EXEC                  -                                    Command 
                                                                         termination/prompt. 
              RESET                 -UPS              85                 System Reset 
              EXAM MEM              .                                    Examine Memory command 
              8                     0008.                                 
              D                     008D.                                Memory  location  to  be 
                                                                         examined & modified. 
              0                     08D0.                                Memory  location  to  be 
                                                                         examined & modified. 
              0                     8D00.                                 
              NEXT                  8D00              XX.                Contents of this location 
              A                     8D00              0A.                New data to be entered 
       4      F                     8D00              AF.                 
              EXEC                  -                                    Command         termination 
                                                                         prompt 
               
               
              S. PAUDEL. MSc | LECTURER, DEPARTMENT OF INFORMATION TECHNOLOGY (BSC CSIT)