Question

Write a subroutine to fill the memory location 2500H to 2509H with values
of FF H.

Answer 1

Answer:

Algorithm –

Load register pair H-L with the address 2500H

Load register pair D-E with the address 2600H

Move the content at memory location into accumulator

Store the content of accumulator into memory pointed by D-E

Increment value of register pair H-L and D-E by 1

Decrements value of register C by 1

If zero flag not equal to 1, go to step 3

Stop

Explanation:

Answer 2

Answer:

We need to follow the following algorithm:

Step 1: Load register pair H-L with address 2500H.

Step 2: Load register pair D-E with the address 2600H.

Step 3: Move the content at memory location into accumulator.

Step 4: Store the content of accumulator into memory pointed by D-E.

Step 5: Increment value of register pair H-L and D-E by 1.

Step 6: Decrements value of register C by 1.

Step 7: If zero flag not equal to 1, go to step 3.

Step 8: Stop.