diff --git a/src/vm.cpp b/src/vm.cpp
index 9b8b10f..5644d1d 100644
--- a/src/vm.cpp
+++ b/src/vm.cpp
@@ -58,6 +58,14 @@ void UART::write_mem_u8(uint8_t* src, size_t addr) {
   }
 }
 
+void UART::write_mem_u32(uint32_t* src, size_t addr) {
+  uint8_t* s = (uint8_t*)src;
+
+  for (size_t i = 0; i < 4; i++) {
+    write_mem_u8(s + i, addr + i);
+  }
+}
+
 void Timer::update() {
   using Clock = std::chrono::high_resolution_clock;
   constexpr auto den = Clock::period::den;
diff --git a/src/vm.hpp b/src/vm.hpp
index 0e5f0b8..478f8a7 100644
--- a/src/vm.hpp
+++ b/src/vm.hpp
@@ -75,6 +75,7 @@ class UART final : public Device {
   UART() : Device(UART_ADDR, 8) {}
 
   virtual void write_mem_u8(uint8_t *src, size_t addr);
+  virtual void write_mem_u32(uint32_t *src, size_t addr);
 
   virtual void read_mem_u8(uint8_t *dst, size_t addr);