diff --git a/src/debug.cpp b/src/debug.cpp
index 227798c..00bd681 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -149,7 +149,7 @@ void GDBStub::handle_packet(const std::string &packet) {
       // Getting specific register
       int regnum = std::stoi(packet.substr(1), nullptr, 16);
 
-      uint32_t reg_value = vm.read_register(regnum);
+      uint32_t reg_value = vm.getreg(regnum);
 
       std::ostringstream response;
       for (int i = 0; i < 4; ++i) {
@@ -278,11 +278,11 @@ bool GDBStub::parse_memory_request(const std::string &packet, size_t &addr,
 
 std::string GDBStub::read_registers() {
   std::ostringstream out;
-  for (int i = 0; i < 32; ++i) {
-    uint32_t reg_value = vm.read_register(i);
-    for (int i = 0; i < 4; ++i) {
+  for (size_t i = 0; i < 32; ++i) {
+    uint32_t reg_value = vm.getreg(i);
+    for (size_t j = 0; j < 4; ++j) {
       out << std::hex << std::setfill('0') << std::setw(2)
-          << ((reg_value >> (i * 8)) & 0xFF);
+          << ((reg_value >> (j * 8)) & 0xFF);
     }
   }
   return out.str();
diff --git a/src/vm.cpp b/src/vm.cpp
index 13ac3e4..8fc0371 100644
--- a/src/vm.cpp
+++ b/src/vm.cpp
@@ -19,7 +19,7 @@ VM::VM(const std::vector<uint8_t>& memory, const std::string& file_path)
   devices[1] = &uart;
 }
 
-void VM::setreg(int regnum, uint32_t value) {
+void VM::setreg(size_t regnum, uint32_t value) {
   if (regnum == 0) {
     return;
   }
@@ -115,14 +115,7 @@ std::vector<uint8_t> VM::read_memory(size_t start, size_t size) {
   return res;
 }
 
-bool VM::is_mmap(size_t pos, size_t size) {
-  if (pos + size < UART_ADDR) return false;
-  if (pos >= UART_ADDR + 8) return false;
-
-  return (pos < UART_ADDR + 8) && (pos + size >= UART_ADDR - 1);
-}
-
-uint32_t VM::read_register(size_t regnum) {
+uint32_t VM::getreg(size_t regnum) {
   if (regnum == 32) return pc;
 
   if (regnum >= NUM_REGISTERS) {
diff --git a/src/vm.hpp b/src/vm.hpp
index 53c5083..d8ce4b2 100644
--- a/src/vm.hpp
+++ b/src/vm.hpp
@@ -68,13 +68,10 @@ class VM {
   void read_mem(uint8_t *dst, size_t addr, size_t size);
   void write_mem(uint8_t *src, size_t addr, size_t size);
 
-  bool is_mmap(size_t pos, size_t size);
-
-  uint32_t read_register(size_t regnum);
-
   const std::string &get_file_path();
 
-  void setreg(int regnum, uint32_t value);
+  uint32_t getreg(size_t regnum);
+  void setreg(size_t regnum, uint32_t value);
 
  private:
   RAM ram;