diff --git a/LR35902/inc/Bus.h b/LR35902/inc/Bus.h
index 5093480..d4ec31f 100644
--- a/LR35902/inc/Bus.h
+++ b/LR35902/inc/Bus.h
@@ -103,15 +103,7 @@ namespace EightBit {
 			return Memory::read(BASE + offset);
 		}
 
-		void checkTimer(int cycles) {
-			if (timerEnabled()) {
-				m_timerCounter -= cycles;
-				if (m_timerCounter <= 0) {
-					m_timerCounter = m_timerRate;
-					incrementTIMA();
-				}
-			}
-		}
+		void checkTimers(int cycles);
 
 		int timerClockTicks() {
 			switch (timerClock()) {
@@ -141,6 +133,11 @@ namespace EightBit {
 			return (readRegister(TAC) & Processor::Bit2) == 0;
 		}
 
+		void incrementDIV() {
+			auto current = readRegister(DIV);
+			writeRegister(DIV, ++current);
+		}
+
 		void incrementTIMA() {
 			uint16_t updated = readRegister(TIMA) + 1;
 			if (updated & Processor::Bit8) {
@@ -175,9 +172,13 @@ namespace EightBit {
 		std::array<uint8_t, 0x100> m_boot;
 		bool m_disableBootRom;
 
+		int m_divCounter;
 		int m_timerCounter;
 		int m_timerRate;
 
 		void Bus_WrittenByte(const AddressEventArgs& e);
+
+		void checkDiv(int cycles);
+		void checkTimer(int cycles);
 	};
 }
\ No newline at end of file
diff --git a/LR35902/src/Bus.cpp b/LR35902/src/Bus.cpp
index bd04d0f..49ac6b8 100644
--- a/LR35902/src/Bus.cpp
+++ b/LR35902/src/Bus.cpp
@@ -2,7 +2,11 @@
 #include "Bus.h"
 
 EightBit::Bus::Bus()
-: Memory(0xffff) {
+: Memory(0xffff),
+  m_disableBootRom(false),
+  m_divCounter(256),
+  m_timerCounter(0),
+  m_timerRate(0) {
 	WrittenByte.connect(std::bind(&Bus::Bus_WrittenByte, this, std::placeholders::_1));
 }
 
@@ -45,5 +49,32 @@ void EightBit::Bus::Bus_WrittenByte(const AddressEventArgs& e) {
 	case BASE + BOOT_DISABLE:
 		m_disableBootRom = e.getCell() != 0;
 		break;
+	case BASE + DIV:
+		reference() = 0;
+		m_timerCounter = 0;
+		break;
 	}
-}
\ No newline at end of file
+}
+
+void EightBit::Bus::checkTimers(int cycles) {
+	checkDiv(cycles);
+	checkTimer(cycles);
+}
+
+void EightBit::Bus::checkDiv(int cycles) {
+	m_divCounter -= cycles;
+	if (m_divCounter <= 0) {
+		m_divCounter = 256;
+		incrementDIV();
+	}
+}
+
+void EightBit::Bus::checkTimer(int cycles) {
+	if (timerEnabled()) {
+		m_timerCounter -= cycles;
+		if (m_timerCounter <= 0) {
+			m_timerCounter = m_timerRate;
+			incrementTIMA();
+		}
+	}
+}
diff --git a/LR35902/src/LR35902.cpp b/LR35902/src/LR35902.cpp
index 1227873..c2560b9 100644
--- a/LR35902/src/LR35902.cpp
+++ b/LR35902/src/LR35902.cpp
@@ -354,7 +354,7 @@ int EightBit::LR35902::run(int limit) {
 			current += step();
 		}
 
-		m_bus.checkTimer(current);
+		m_bus.checkTimers(current);
 
 	} while (current < limit);
 	return current;