I am having a lot of difficulty understanding how assembly language works, so I\
ID: 3547163 • Letter: I
Question
I am having a lot of difficulty understanding how assembly language works, so I'm not quite sure what this program is doing. Can you explain what is happening in each step and what the purpose of the program is?
ORG 100
CLA ; Clear the Accumulator
CMA ; Complement the value stored in the Accumulator
STA 50 ; Store the Accumulator value in memory location 50
CLA ; Clear the Accumulator
Loop: INC ; Increment the value in the Accumulator
AND 50 ; AND the value in the Accumulator with the number 50
SZA ; Skip if Accumulator = 0
BUN Loop ; Branch unconditionally to Label =
I am having a lot of difficulty understanding how assembly language works, so I'm not quite sure what this program is doing. Can you explain what is happening in each step and what the purpose of the program is?Explanation / Answer
ORG 100 - means the program starts running from memory location 100
CLA - sets the accumulator value to 00
CMA - complement the value stored in accumulator means 00 will change to FF(1111 1111)
STA - 50 stores the value FF in memory location 50
CLA - now Accumulator value will be again 00
Loop: INC;
AND 50;
SZA
BUN Loop;
--- At Loop point a loop begins until accumulator becomes zero again
this loop will and the value stored at memory location 50 for (1111 1111) times then this will end
run 1: Accumulator will be = 0000 0001
Anding with 1111 1111 results 0000 0001 which is same the accumulator value so this step will repeat until Accumulator again come back to 0000 0000.
The objective of the program is to run the loop some particular number of time by seting a value at some memory location and anding it will accumulator value
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