diff --git a/inc/Instruction.h b/inc/Instruction.h
index dab7342..4c646c5 100644
--- a/inc/Instruction.h
+++ b/inc/Instruction.h
@@ -360,6 +360,10 @@ public:
     m_instr.range(19,12) = aux.range(19,12);
   }
 
+  inline int32_t get_shamt() {
+    return m_instr.range(25, 20);
+  }
+
   inline int32_t get_csr() {
     int32_t aux = 0;
 
diff --git a/inc/Registers.h b/inc/Registers.h
index 6368104..2d7a61f 100644
--- a/inc/Registers.h
+++ b/inc/Registers.h
@@ -19,7 +19,7 @@
 #define WARL_M_EXTENSION (1 << 12)
 #define WARL_C_EXTENSION (1 << 2)
 #define WARL_I_BASE (1 << 8)
-#define WARL_MXL (1 << 29)
+#define WARL_MXL (1 << 30)
 
 
 #define CSR_MSTATUS (0x300)
diff --git a/src/Execute.cpp b/src/Execute.cpp
index fe53e8a..9839a23 100644
--- a/src/Execute.cpp
+++ b/src/Execute.cpp
@@ -542,10 +542,11 @@ void Execute::SLLI(Instruction &inst) {
 
   rd = inst.get_rd();
   rs1 = inst.get_rs1();
-  rs2 = inst.get_rs2();
+  rs2 = inst.get_shamt();
 
   if (rs2 >= 0x20) {
     // raise an exception, but how?
+    cout << "ILEGAL INSTRUCTION, shamt[5] != 0" << endl;
   }
 
   shift = rs2 & 0x1F;
@@ -555,7 +556,7 @@ void Execute::SLLI(Instruction &inst) {
 
   log->SC_log(Log::INFO) << "SLLI: x"
           << rs1 << " << " << shift << " -> x"
-          << rd  << endl;
+          << rd << "(0x" << hex << calc << ")" << endl;
 }
 
 void Execute::SRLI(Instruction &inst) {
diff --git a/src/Registers.cpp b/src/Registers.cpp
index 9a17355..a8930fc 100644
--- a/src/Registers.cpp
+++ b/src/Registers.cpp
@@ -94,6 +94,6 @@ void Registers::setCSR(int csr, uint32_t value) {
 }
 
 void Registers::initCSR() {
-  CSR[0x301] = WARL_MXL | WARL_M_EXTENSION | WARL_C_EXTENSION | WARL_I_BASE;
+  CSR[CSR_MISA] = WARL_MXL | WARL_M_EXTENSION | WARL_C_EXTENSION | WARL_I_BASE;
 
 }