Question

Write an assembly language program to fill the memory block of 16 memory locations staring from C200H with data byte 22H and 33H every alternate memory locations.

Answer 1

      LXI H, C200H  ; Point to starting memory location
      MVI C, 08H    ; Counter set to 8 (since we fill 2 bytes per loop)

LOOP: MVI M, 22H    ; Fill first location with 22H
      INX H         ; Move to next location
      MVI M, 33H    ; Fill next location with 33H
      INX H         ; Move to next location
      DCR C         ; Decrement counter
      JNZ LOOP      ; Repeat until 16 locations are filled (8 * 2)
      HLT           ; Terminate