diff --git a/src/instructions.c b/src/instructions.c
index e69de29..94399d9 100644
--- a/src/instructions.c
+++ b/src/instructions.c
@@ -0,0 +1,135 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include "instructions.h"
+
+int GetInstruction(shcommand_t command){
+    //Data Transfer Instructions
+    if(command.n1 == 0x6 && command.n4 == 0x3){
+            return MOV_R_R;
+    }
+    else if(command.n1 == 0xE){
+            return MOV_B_R;
+    }
+    else if(command.b1 == 0xC7){
+            return MOVA_PC_R0;
+    }
+    else if(command.n1 == 0x9){
+            return MOVW_PC_R;
+    }
+    else if(command.n1 == 0xD){
+            return MOVL_PC_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x0){
+            return MOVB_aR_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x1){
+            return MOVW_aR_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x2){
+            return MOVL_aR_R;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x0){
+            return MOVB_R_aR;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x1){
+            return MOVW_R_aR;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x2){
+            return MOVL_R_aR;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x4){
+            return MOVB_aRp_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x5){
+            return MOVW_aRp_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x6){
+            return MOVL_aRp_R;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x4){
+            return MOVB_R_amR;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x5){
+            return MOVW_R_amR;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0x6){
+            return MOVL_R_amR;
+    }
+    else if(command.b1 == 0x84){
+            return MOVB_PCR_R0;
+    }
+    else if(command.b1 == 0x84){
+            return MOVW_PCR_R0;
+    }
+    else if(command.n1 == 0x5){
+            return MOVL_PCR_R;
+    }
+    else if(command.b1 == 0x81){
+            return MOVW_R0_PCR;
+    }
+    else if(command.n1 == 0x1){
+            return MOVL_R_PCR;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0xC){
+            return MOVB_R0R_R;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0xD){
+            return MOVW_R0R_R;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0xE){
+            return MOVL_R0R_R;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0x4){
+            return MOVB_R_R0R;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0x5){
+            return MOVW_R_R0R;
+    }
+    else if(command.n1 == 0x0 && command.n4 == 0x6){
+            return MOVL_R_R0R;
+    }
+    else if(command.b1 == 0xC4){
+            return MOVB_PCGBR_R0;
+    }
+    else if(command.b1 == 0xC5){
+            return MOVW_PCGBR_R0;
+    }
+    else if(command.b1 == 0xC6){
+            return MOVL_PCGBR_R0;
+    }
+    else if(command.b1 == 0xC0){
+            return MOVB_R0_PCGBR;
+    }
+    else if(command.b1 == 0xC1){
+            return MOVW_R0_PCGBR;
+    }
+    else if(command.b1 == 0xC2){
+            return MOVL_R0_PCGBR;
+    }
+    else if(command.n1 == 0x0 && command.b2 == 0x73){
+            return MOVCOL_R0_aR;
+    }
+    else if(command.n1 == 0x0 && command.b2 == 0x63){
+            return MOVLIL_aR_R0;
+    }
+    else if(command.n1 == 0x4 && command.b2 == 0xA9){
+            return MOVUAL_aR_R0;
+    }
+    else if(command.n1 == 0x4 && command.b2 == 0xE9){
+            return MOVUAL_aRp_R0;
+    }
+    else if(command.n1 == 0x0 && command.b2 == 0x29){
+            return MOVT_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x8){
+            return SWAPB_R_R;
+    }
+    else if(command.n1 == 0x6 && command.n4 == 0x9){
+            return SWAPW_R_R;
+    }
+    else if(command.n1 == 0x2 && command.n4 == 0xD){
+            return XTRCT_R_R;
+    }
+}