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diff --git a/2522/CH7/EX7.4/exm7_4.sce b/2522/CH7/EX7.4/exm7_4.sce
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+//page no 222
+//example no 7.4
+// USE OF ADDRESSING MODES.
+clc;
+//register B contains 32H
+B=32;
+
+//using indirect addressing modes
+printf('B= %d \n',B);
+disp(' 1) LXI H,8000H'); // loads HL register pair.
+disp('H=80H     L=00H'); 
+disp('MOV M,B'); // contents of register B are moved in memory location pointed by HL register pair.
+M=B; 
+printf('\n 8000H --> %d \n \n',M);
+
+disp('LXI D,8000H'); //loads the memory location 8000H in DE register pair.
+disp('D=80H     E=00H'); 
+disp('MOV A,B');
+A=B;
+printf('A= %d \n',A);
+disp('STAX D'); //stores the value of accumulator in the memory location pointer by DE register pair.
+printf('\n 8000H --> %d \n \n',A);
+
+//using direct addressing mode.
+disp('2) A= F2H');
+disp('STA 8000H'); //this instruction stores the value of accumulator in the memory location 8000H.
+disp('8000H --> F2H');
+
+//using indirect addressing mode.
+disp('3) LXI H,8000H'); // loads HL register pair.
+disp('H=80H     L=00H'); 
+disp('MVI M,F2H'); //moving the data in the memory.
+disp('8000H --> F2H');
diff --git a/2522/CH7/EX7.4/exm7_4_output1.jpg b/2522/CH7/EX7.4/exm7_4_output1.jpg
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diff --git a/2522/CH7/EX7.4/exm7_4_output2.jpg b/2522/CH7/EX7.4/exm7_4_output2.jpg
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