diff --git a/njvm.c b/njvm.c
index 652144e..70902b1 100644
--- a/njvm.c
+++ b/njvm.c
@@ -14,6 +14,9 @@ int debug = 0;
 struct stack stack;
 #define SIZE 1000
 
+//Register
+struct stack reg;
+
 // Program
 struct program program;
 
@@ -194,6 +197,13 @@ void execute(struct program program) {
                 push(stack, temp);
                 push(stack, temp);
                 break;
+            case PUSHR:
+                //TODO
+                push(reg, SIGN_EXTEND(IMMEDIATE(program.program[i])));
+                break;
+            case POPR:
+                push(stack, pop(reg));  
+                break;
       
         }
         if (debug == 1) printf("=== DEBUG: Stack after instruction %i ===\n", i);
@@ -216,6 +226,14 @@ int main(int argc, char *argv[]) {
     stack.size = &size;
     stack.current = &current;
     stack.stack = s;
+    
+    // Initialize the registery
+    int rSize = SIZE;
+    int rCurrent = 0;
+    unsigned int r[SIZE];
+    reg.size = &rSize;
+    reg.current = &rCurrent;
+    reg.stack = r;
 
     // Initialize ProgrammSpeicher
     int psize = 1000;