diff --git a/M6532/inc/M6532.h b/M6532/inc/M6532.h
index 50a32e8..26c8c59 100644
--- a/M6532/inc/M6532.h
+++ b/M6532/inc/M6532.h
@@ -2,7 +2,7 @@
 
 #include <cstdint>
 
-#include <Chip.h>
+#include <ClockedChip.h>
 
 /*
 	PIA 6532 combined timer, IO and 128 bytes RAM
@@ -177,7 +177,7 @@
 
 
 namespace EightBit {
-	class M6532 final : public Chip {
+	class M6532 final : public ClockedChip {
 	public:
 		M6532() noexcept;
 		virtual ~M6532() = default;
diff --git a/MC6809/test/Board.cpp b/MC6809/test/Board.cpp
index c925554..8b86e34 100644
--- a/MC6809/test/Board.cpp
+++ b/MC6809/test/Board.cpp
@@ -118,7 +118,9 @@ void Board::updateAciaPins(const EightBit::Chip::PinLevel rw) {
 
 bool Board::accessAcia() {
 	ACIA().raise(ACIA().E());
-	const bool accessed = ACIA().tick();
+	const bool activated = ACIA().activated();
+	if (activated)
+		ACIA().step();
 	ACIA().lower(ACIA().E());
-	return accessed;
+	return activated;
 }
diff --git a/MC6850/inc/MC6850.h b/MC6850/inc/MC6850.h
index 0bae324..2447e17 100644
--- a/MC6850/inc/MC6850.h
+++ b/MC6850/inc/MC6850.h
@@ -2,12 +2,14 @@
 
 #include <cstdint>
 
-#include <Chip.h>
+#include <ClockedChip.h>
 #include <Signal.h>
 
 namespace EightBit {
-	class mc6850 : public Chip {
+	class mc6850 final : public ClockedChip {
 	public:
+		void powerOn() final;
+
 		// +--------+----------------------------------------------------------------------------------+
 		// |		|								Buffer address									   |
 		// |		+------------------+------------------+--------------------+-----------------------+
@@ -242,8 +244,9 @@ namespace EightBit {
 		// Receive data register;
 		auto& RDR() { return m_RDR; }
 
-		bool tick();
+		void step();
 
+		bool activated() { return powered() && raised(E()) && selected(); }
 		bool selected();
 
 		void markTransmitComplete();
@@ -318,6 +321,7 @@ namespace EightBit {
 		uint8_t m_TDR = 0;
 		uint8_t m_RDR = 0;
 
-		bool m_powered = false;
+		enum StartupCondition { ColdStart, WarmStart, Unknown };
+		StartupCondition m_startup = WarmStart;
 	};
 }
diff --git a/MC6850/src/MC6850.cpp b/MC6850/src/MC6850.cpp
index b9b7c6c..2fa2e81 100644
Binary files a/MC6850/src/MC6850.cpp and b/MC6850/src/MC6850.cpp differ
diff --git a/inc/ClockedChip.h b/inc/ClockedChip.h
new file mode 100644
index 0000000..564f733
--- /dev/null
+++ b/inc/ClockedChip.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Chip.h"
+#include "EventArgs.h"
+#include "Signal.h"
+
+namespace EightBit {
+	class ClockedChip : public Chip {
+	public:
+		~ClockedChip() {};
+
+		Signal<EventArgs> Ticked;
+
+		[[nodiscard]] auto cycles() const noexcept { return m_cycles; }
+
+	protected:
+		void resetCycles() noexcept { m_cycles = 0; }
+		void tick(const int extra) { for (int i = 0; i < extra; ++i) tick(); }
+		void tick() { ++m_cycles;  	Ticked.fire(EventArgs::empty()); }
+
+	private:
+		int m_cycles = 0;
+	};
+}
diff --git a/inc/Processor.h b/inc/Processor.h
index fdd2628..7db829e 100644
--- a/inc/Processor.h
+++ b/inc/Processor.h
@@ -2,15 +2,14 @@
 
 #include <cstdint>
 
-#include "Chip.h"
+#include "ClockedChip.h"
 #include "Bus.h"
 #include "Register.h"
-#include "Signal.h"
 
 #include "EightBitCompilerDefinitions.h"
 
 namespace EightBit {
-	class Processor : public Chip {
+	class Processor : public ClockedChip {
 	public:
 		// b: number of bits representing the number in x
 		// x: sign extend this b-bit number to r
@@ -18,8 +17,6 @@ namespace EightBit {
 
 		~Processor() {};
 
-		Signal<EventArgs> Ticked;
-
 		[[nodiscard]] auto& PC() noexcept { return m_pc; }
 
 		[[nodiscard]] auto& RESET() noexcept { return m_resetLine; }
@@ -35,8 +32,6 @@ namespace EightBit {
 		virtual int execute() = 0;
 		int execute(uint8_t value);
 
-		[[nodiscard]] auto cycles() const noexcept { return m_cycles; }
-
 		[[nodiscard]] virtual register16_t peekWord(register16_t address) = 0;
 		virtual void pokeWord(register16_t address, register16_t value) = 0;
 
@@ -108,14 +103,9 @@ namespace EightBit {
 
 		virtual void ret();
 
-		void resetCycles() noexcept { m_cycles = 0; }
-		void tick(const int extra) { for (int i = 0; i < extra; ++i) tick(); }
-		void tick() { ++m_cycles;  	Ticked.fire(EventArgs::empty()); }
-
 	private:
 		Bus& m_bus;
 		uint8_t m_opcode = Mask8;
-		int m_cycles = 0;
 		register16_t m_pc;
 
 		PinLevel m_intLine = PinLevel::Low;
diff --git a/src/EightBit.vcxproj b/src/EightBit.vcxproj
index 0030416..01ac42a 100644
--- a/src/EightBit.vcxproj
+++ b/src/EightBit.vcxproj
@@ -145,6 +145,7 @@
     <ClInclude Include="..\inc\BigEndianProcessor.h" />
     <ClInclude Include="..\inc\Bus.h" />
     <ClInclude Include="..\inc\Chip.h" />
+    <ClInclude Include="..\inc\ClockedChip.h" />
     <ClInclude Include="..\inc\Device.h" />
     <ClInclude Include="..\inc\EightBitCompilerDefinitions.h" />
     <ClInclude Include="..\inc\EventArgs.h" />
diff --git a/src/EightBit.vcxproj.filters b/src/EightBit.vcxproj.filters
index 0641168..e32659c 100644
--- a/src/EightBit.vcxproj.filters
+++ b/src/EightBit.vcxproj.filters
@@ -71,6 +71,9 @@
     <ClInclude Include="..\inc\Mapper.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\inc\ClockedChip.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">