diff --git a/.gitignore b/.gitignore
index dcf12cf..43431c8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,10 @@ helper.ods
 *.swp
 RISCV_TLM
 dump
+.project
+.cproject
+.settings
+doc/Drawings.odg
+doc/html
+env.sh
+gh-md-toc
diff --git a/inc/Registers.h b/inc/Registers.h
index 297db7f..63ec772 100644
--- a/inc/Registers.h
+++ b/inc/Registers.h
@@ -1,6 +1,6 @@
 /*!
    \file Registers.h
-   \brief Basic register file implementation
+   \brief Basic register file 
    \author Màrius Montón
    \date August 2018
 */
diff --git a/src/Execute.cpp b/src/Execute.cpp
index 2d4e9e6..e097713 100644
--- a/src/Execute.cpp
+++ b/src/Execute.cpp
@@ -1558,7 +1558,7 @@ bool Execute::M_MUL(Instruction &inst) {
   multiplier = regs->getValue(rs1);
   multiplicand = regs->getValue(rs2);
 
-  result = multiplier * multiplicand;
+  result = (int64_t) multiplier * multiplicand;
   result = result & 0x00000000FFFFFFFF;
   regs->setValue(rd, result);
 
diff --git a/src/Memory.cpp b/src/Memory.cpp
index 9326774..b28b872 100644
--- a/src/Memory.cpp
+++ b/src/Memory.cpp
@@ -29,6 +29,10 @@ Memory::Memory(sc_module_name name, bool use_file): sc_module(name)
     memory_offset = 0;
     program_counter = 0;
     //memset(mem, 0, SIZE*sizeof(uint8_t));
+    //
+    mem = new uint8_t[SIZE];
+    log = Log::getInstance();
+    log->SC_log(Log::INFO) << "Memory instantiated wihtout file" << endl;
   }
 
   
@@ -160,23 +164,23 @@ void Memory::readHexFile(string filename) {
           } else if (line.substr(7,2) == "02") {
             /* Extended segment address */
             extended_address = stol(line.substr(9,4), nullptr, 16) * 16;
-            cout << "02 extended address 0x" << hex << extended_address << endl;
+            cout << "02 extended address 0x" << hex << extended_address << dec << endl;
           } else if (line.substr(7,2) == "03") {
             /* Start segment address */
             uint32_t code_segment;
             code_segment = stol(line.substr(9,4), nullptr, 16) * 16; /* ? */
             program_counter = stol(line.substr(13,4), nullptr, 16);
             program_counter = program_counter + code_segment;
-            cout << "03 PC set to 0x" << hex << program_counter << endl;
+            cout << "03 PC set to 0x" << hex << program_counter << dec << endl;
           } else if (line.substr(7,2) == "04") {
             /* Start segment address */
             memory_offset = stol(line.substr(9,4), nullptr, 16) << 16;
             extended_address = 0;
-            cout << "04 address set to 0x" << hex << extended_address << endl;
-            cout << "04 offset set to 0x" << hex << memory_offset << endl;
+            cout << "04 address set to 0x" << hex << extended_address << dec << endl;
+            cout << "04 offset set to 0x" << hex << memory_offset << dec << endl;
           } else if (line.substr(7,2) == "05") {
             program_counter = stol(line.substr(9,8), nullptr, 16);
-            cout << "05 PC set to 0x" << hex << program_counter << endl;
+            cout << "05 PC set to 0x" << hex << program_counter << dec << endl;
           }
         }
       }
diff --git a/src/Registers.cpp b/src/Registers.cpp
index bd8620e..f1e8e78 100644
--- a/src/Registers.cpp
+++ b/src/Registers.cpp
@@ -1,3 +1,10 @@
+/*!
+   \file Registers.cpp
+   \brief Basic register file implementation
+   \author Màrius Montón
+   \date August 2018
+*/
+
 #include "Registers.h"
 
 Registers::Registers() {
@@ -58,7 +65,7 @@ void Registers::dump(void) {
   cout << " x30 (t5):   " << right << setw(11) << register_bank[30];
   cout << " x31 (t6):   " << right << setw(11) << register_bank[31] << endl;
 
-  cout << "PC: 0x" << hex << register_PC << endl;
+  cout << "PC: 0x" << hex << register_PC << dec << endl;
   cout << "************************************" << endl;
 }
 
diff --git a/src/Trace.cpp b/src/Trace.cpp
index 14bdb96..a656b91 100644
--- a/src/Trace.cpp
+++ b/src/Trace.cpp
@@ -64,24 +64,27 @@ void Trace::xtermKill( const char *mess ) {
 
 void Trace::xtermSetup(void) {
     ptMaster = open("/dev/ptmx", O_RDWR);
-    grantpt( ptMaster );
+
+    if (ptMaster != -1) {
+        grantpt( ptMaster );
     
-    unlockpt( ptMaster );
+        unlockpt( ptMaster );
     
-    char *ptSlaveName = ptsname( ptMaster );
-    ptSlave = open( ptSlaveName, O_RDWR );	// In and out are the same
+        char *ptSlaveName = ptsname( ptMaster );
+        ptSlave = open( ptSlaveName, O_RDWR );	// In and out are the same
     
-    struct termios  termInfo;
-    tcgetattr( ptSlave, &termInfo );
+        struct termios  termInfo;
+        tcgetattr( ptSlave, &termInfo );
     
-    termInfo.c_lflag &= ~ECHO;
-    termInfo.c_lflag &= ~ICANON;
-    tcsetattr( ptSlave, TCSADRAIN, &termInfo );
+        termInfo.c_lflag &= ~ECHO;
+        termInfo.c_lflag &= ~ICANON;
+        tcsetattr( ptSlave, TCSADRAIN, &termInfo );
     
-    xtermPid = fork();
+        xtermPid = fork();
     
-    if (xtermPid == 0) {
-        xtermLaunch( ptSlaveName );
+        if (xtermPid == 0) {
+            xtermLaunch( ptSlaveName );
+        }
     }
 }