Completed the first 8086 simulation homework

8086_sim/sim86.cpp

@@ -42,6 +42,8 @@ int main(int argc, char *argv[]) {
 
   u32 offset = 0;
 
+  bool accessed_registers[REGISTER_COUNT] = {false};
+
   while (offset < size) {
     instruction decoded;
     Sim86_Decode8086Instruction(size - offset, buffer + offset, &decoded);
@@ -55,13 +57,22 @@ int main(int argc, char *argv[]) {
 
         if (dest.Type == Operand_Register) {
           mov_to_register(dest.Register, source);
-          printf("%s: 0x%04x\n", get_register_name(dest.Register),
-                 get_register(dest.Register));
+
+          accessed_registers[dest.Register.Index] = true;
         }
       }
     }
   }
 
+  for (u32 i = 0; i < REGISTER_COUNT; ++i) {
+    if (accessed_registers[i]) {
+      register_access reg = {i, 0, 2};
+      u16 value = get_register(reg);
+
+      printf("%s: 0x%04x (%d)\n", get_register_name(reg), value, value);
+    }
+  }
+
   return 0;
 }