diff --git a/src/spider/runtime/instr/Instr_000-01F.cpp b/src/spider/runtime/instr/Instr_000-01F.cpp
index 425ed25..b96b3a3 100644
--- a/src/spider/runtime/instr/Instr_000-01F.cpp
+++ b/src/spider/runtime/instr/Instr_000-01F.cpp
@@ -111,16 +111,16 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u16 = _dst->_u8 & 1;
+                _dst->_i16 = static_cast<i16>(_dst->_i8);
                 break;
             case 0b01: //short
-                _dst->_u32 = _dst->_u16 & 1;
+                _dst->_i32 = static_cast<i32>(_dst->_i16);
                 break;
             case 0b10: //int
-                _dst->_u64 = _dst->_u32 & 1;
+                _dst->_i64 = static_cast<i64>(_dst->_i32);
                 break;
             case 0b11: //long
-                _dst->_u64 = _dst->_u64;
+                _dst->_i64 = _dst->_i64;
                 break;
         }
         _dst->_u32 = _dst->_u8;
@@ -295,19 +295,19 @@ namespace spider {
         (this->*_post)();
     }
 
-    void CPU::DMOD() {
-        // TODO: Implement DMOD
+    void CPU::DMOD() { //It gives error and I dont understand why
+        // TODO: Implement DMOD 
         fetchOperSrc();
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_i8 = _dst->_i8 / _src->_i8, _dst->_i8 % _src->_i8;
+                //_dst->_i8 / _src->_i8 = RX * _src + RY;
             case 0b01: //short
-                _dst->_i16 = _dst->_i16 / _src->_i16, _dst->_i16 % _src->_i16;
+                //_dst->_i16 / _src->_i16 = RX * _src->_i16 + RY;
             case 0b10: //int
-                _dst->_i32 = _dst->_i32 / _src->_i32, _dst->_i32 % _src->_i32;
+                //_dst->_i32 / _src->_i32 = RX * _src->_i32 + RY;
             case 0b11: //long
-                _dst->_i64 = _dst->_i64 / _src->_i64, _dst->_i64 % _src->_i64;
+                //_dst->_i64 / _src->_i64 = RX * _src->_i64 + RY;
         }
         (this->*_post)();
     }
@@ -318,13 +318,13 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u8 = _dst->_u8 / _src->_u8, _dst->_u8 % _src->_u8;
+                //_dst->_u8 / _src->_u8 = RX * _src->_u8 + RY;
             case 0b01: //short
-                _dst->_u16 = _dst->_u16 / _src->_u16, _dst->_u16 % _src->_u16;
+                //_dst->_u16 / _src->_u16 = RX * _src->_u16 + RY;
             case 0b10: //int
-                _dst->_u32 = _dst->_u32 / _src->_u32, _dst->_u32 % _src->_u32;
+                //_dst->_u32 / _src->_u32 = RX * _src->_u32 + RY;
             case 0b11: //long
-                _dst->_u64 = _dst->_u64 / _src->_u64, _dst->_u64 % _src->_u64;
+                //_dst->_u64 / _src->_u64 = RX * _src->_u64 + RY;
         }
         (this->*_post)();
     }
diff --git a/src/spider/runtime/instr/Instr_020-03F.cpp b/src/spider/runtime/instr/Instr_020-03F.cpp
index 40166f7..58a8805 100644
--- a/src/spider/runtime/instr/Instr_020-03F.cpp
+++ b/src/spider/runtime/instr/Instr_020-03F.cpp
@@ -63,13 +63,13 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u8 = 1;
+                _dst->_u8 = _dst != 0;
             case 0b01: //short
-                _dst->_u16 = 1;
+                _dst->_u16 = _dst != 0;
             case 0b10: //int
-                _dst->_u32 = 1;
+                _dst->_u32 = _dst != 0;
             case 0b11: //long
-                _dst->_u64 = 1;
+                _dst->_u64 = _dst != 0;
         }
         (this->*_post)();
     }