diff --git a/ES/Lab/LAB4/HEXtoBCD.asm b/ES/Lab/LAB4/HEXtoBCD.asm
new file mode 100644
index 0000000..cbc3294
--- /dev/null
+++ b/ES/Lab/LAB4/HEXtoBCD.asm
@@ -0,0 +1,39 @@
+	AREA RESET, DATA, READONLY
+	EXPORT __Vectors
+__Vectors
+	DCD 0x10001000
+	DCD Reset_Handler
+	ALIGN
+	
+	AREA MYCODE, CODE, READONLY
+	ENTRY
+	EXPORT Reset_Handler
+
+Reset_Handler
+	LDR R0, =SRR        
+	LDR R1, [R0]       
+	MOV R4, #0          
+	MOV R11, #1         
+	MOV R10, #3         
+
+LOOP
+	MOV R5, #10
+	UDIV R3, R1, R5     
+	MUL R6, R3, R5     
+	SUB R7, R1, R6     
+	MUL R8, R7, R11     
+	ADD R4, R4, R8      
+	LSL R11, R11, #4    
+	MOV R1, R3          
+	SUBS R10, #1
+	BNE LOOP
+
+STOP
+	B STOP
+	
+SRR DCD 0x45
+
+	AREA mydata, DATA, READWRITE
+SRC DCD 0x45
+	
+	END
\ No newline at end of file