Running 2 Youtube Channel : The Masti Adda (Fun based ) : The Knowledge Adda (Knowledge based) : Subscribe for Knowledge with Fun....

Write a program to exchange the contents of memory locations using direct addressing.

Written by @
Assumption: We have to exchange the contents of memory location 2050 H and 2051 H.
Algorithm:
  • Store the number in the accumulator.
  • Save that number in register B.
  • Store the second number in accumulator.
  • Store the second number at 2050H.
  • Get First number in accumulator and Store at 2051H.
Program:
Memory Add
Mnemonics
Op-code
Comments
2000
LDA
2050 H
Store the data in accumulator
2003
MOV
B,A
Store data in Register B
2004
LDA
2051 H
Store second data in accumulator
2007
STA
2050 H
Store the second data at 2050 H
200A
MOV
A,B
Store first number in accumulator
200B
STA
2051 H
Store data at 2051 H
200E
RST
5
Set Break-point
200F
END

End the program
 
Description of used instruction:
LDA adr: Load data into register A (accumulator) directly from the address given within the instruction.
MOV rd,rs: This instruction copies data from the source register to destination register.
STA: This instruction is used to store the content of accumulator at specified memory address.
RST 5: This instruction is used to set break-point for the execution.
END: This instruction is used to execute the program.
Result:
Input:
2050 H-60 H
2051 H-70 H
Output:
2050 H-70 H
2051 H-60 H
Procedure to look output
  • After press ENTER, You will get first screen
  • Press G and Provide Initial address (as 2000)
  • Press SHIFT+4,You will get first screen again
  • Press M and Provide Input location for Input (M2050)
  • Press ENTER and Provide your Input at location (2050:60)
  • Press ENTER and Provide your Input at location (2051:70)
  • Press SHIFT+4
  • Press G and Provide Initial address (as 2000)
  • Press SHIFT+4,You will get first screen again
  • Press M and Provide address for output (M2050) and press ENTER
  • You will get your desired output.

No comments:

Post a Comment