diff --git a/evmcc/Compiler.cpp b/evmcc/Compiler.cpp
index ccdf0b951..39483bc7f 100644
--- a/evmcc/Compiler.cpp
+++ b/evmcc/Compiler.cpp
@@ -183,7 +183,7 @@ std::unique_ptr<llvm::Module> Compiler::compile(const dev::bytes& bytecode)
 
 	BasicBlock* currentBlock = entryBlock;
 
-	for (auto pc = bytecode.cbegin(); pc != bytecode.cend(); ++pc)
+	for (auto pc = bytecode.cbegin(); pc != bytecode.cend() && !finished; ++pc)
 	{
 		using dev::eth::Instruction;
 
@@ -540,6 +540,48 @@ std::unique_ptr<llvm::Module> Compiler::compile(const dev::bytes& bytecode)
 			break;
 		}
 
+		case Instruction::PREVHASH:
+		{
+			auto value = ext.prevhash();
+			stack.push(value);
+			break;
+		}
+
+		case Instruction::COINBASE:
+		{
+			auto value = ext.coinbase();
+			stack.push(value);
+			break;
+		}
+
+		case Instruction::TIMESTAMP:
+		{
+			auto value = ext.timestamp();
+			stack.push(value);
+			break;
+		}
+
+		case Instruction::NUMBER:
+		{
+			auto value = ext.number();
+			stack.push(value);
+			break;
+		}
+
+		case Instruction::DIFFICULTY:
+		{
+			auto value = ext.difficulty();
+			stack.push(value);
+			break;
+		}
+
+		case Instruction::GASLIMIT:
+		{
+			auto value = ext.gaslimit();
+			stack.push(value);
+			break;
+		}
+
 		case Instruction::RETURN:
 		{
 			auto index = stack.pop();
diff --git a/evmcc/ExecutionEngine.cpp b/evmcc/ExecutionEngine.cpp
index 4d847388e..b9a71827a 100644
--- a/evmcc/ExecutionEngine.cpp
+++ b/evmcc/ExecutionEngine.cpp
@@ -77,6 +77,12 @@ int ExecutionEngine::run(std::unique_ptr<llvm::Module> _module)
 	ext->origin = dev::Address(101010101010101010);
 	ext->value = 0xabcd;
 	ext->gasPrice = 1002;
+	ext->previousBlock.hash = dev::u256(1003);
+	ext->currentBlock.coinbaseAddress = dev::Address(1004);
+	ext->currentBlock.timestamp = 1005;
+	ext->currentBlock.number = 1006;
+	ext->currentBlock.difficulty = 1007;
+	ext->currentBlock.gasLimit = 1008;
 	std::string calldata = "Hello the Beautiful World of Ethereum!";
 	ext->data = calldata;
 	Ext::init(std::move(ext));
diff --git a/evmcc/Ext.cpp b/evmcc/Ext.cpp
index 6ae84a286..5690b8ccd 100644
--- a/evmcc/Ext.cpp
+++ b/evmcc/Ext.cpp
@@ -34,14 +34,20 @@ void Ext::init(std::unique_ptr<dev::eth::ExtVMFace> _ext)
 	g_ext = std::move(_ext);
 }
 
-struct ExtData
+struct ExtData 
 {
 	i256 address;
 	i256 caller;
 	i256 origin;
 	i256 callvalue;
-	i256 gasprice;
 	i256 calldatasize;
+	i256 gasprice;
+	i256 prevhash;
+	i256 coinbase;
+	i256 timestamp;
+	i256 number;
+	i256 difficulty;
+	i256 gaslimit;
 	const byte* calldata;
 };
 
@@ -55,13 +61,19 @@ Ext::Ext(llvm::IRBuilder<>& _builder, llvm::Module* module)
 	m_args[1] = m_builder.CreateAlloca(i256Ty, nullptr, "ext.value");
 
 	Type* elements[] = {
-		i256Ty,
-		i256Ty,
-		i256Ty,
-		i256Ty,
-		i256Ty,
-		i256Ty,
-		m_builder.getInt8PtrTy()
+		i256Ty,	 // i256 address;
+		i256Ty,	 // i256 caller;
+		i256Ty,	 // i256 origin;
+		i256Ty,	 // i256 callvalue;
+		i256Ty,	 // i256 calldatasize;
+		i256Ty,	 // i256 gasprice;
+		i256Ty,	 // i256 prevhash;
+		i256Ty,	 // i256 coinbase;
+		i256Ty,	 // i256 timestamp;
+		i256Ty,	 // i256 number;
+		i256Ty,	 // i256 difficulty;
+		i256Ty,	 // i256 gaslimit;
+		//m_builder.getInt8PtrTy()
 	};
 	auto extDataTy = StructType::create(elements, "ext.Data");
 
@@ -101,8 +113,14 @@ Value* Ext::address() { return getDataElem(0, "address"); }
 Value* Ext::caller() { return getDataElem(1, "caller"); }
 Value* Ext::origin() { return getDataElem(2, "origin"); }
 Value* Ext::callvalue() { return getDataElem(3, "callvalue"); }
-Value* Ext::calldatasize() { return getDataElem(5, "calldatasize"); }
-Value* Ext::gasprice() { return getDataElem(4, "gasprice"); }
+Value* Ext::calldatasize() { return getDataElem(4, "calldatasize"); }
+Value* Ext::gasprice() { return getDataElem(5, "gasprice"); }
+Value* Ext::prevhash() { return getDataElem(6, "prevhash"); }
+Value* Ext::coinbase() { return getDataElem(7, "coinbase"); }
+Value* Ext::timestamp() { return getDataElem(8, "timestamp"); }
+Value* Ext::number() { return getDataElem(9, "number"); }
+Value* Ext::difficulty() { return getDataElem(10, "difficulty"); }
+Value* Ext::gaslimit() { return getDataElem(11, "gaslimit"); }
 
 Value* Ext::calldataload(Value* _index)
 {
@@ -135,7 +153,13 @@ EXPORT void ext_init(ExtData* _extData)
 	_extData->callvalue = eth2llvm(g_ext->value);
 	_extData->gasprice = eth2llvm(g_ext->gasPrice);
 	_extData->calldatasize = eth2llvm(g_ext->data.size());
-	_extData->calldata = g_ext->data.data();
+	_extData->prevhash = eth2llvm(g_ext->previousBlock.hash);
+	_extData->coinbase = eth2llvm(fromAddress(g_ext->currentBlock.coinbaseAddress));
+	_extData->timestamp = eth2llvm(g_ext->currentBlock.timestamp);
+	_extData->number = eth2llvm(g_ext->currentBlock.number);
+	_extData->difficulty = eth2llvm(g_ext->currentBlock.difficulty);
+	_extData->gaslimit = eth2llvm(g_ext->currentBlock.gasLimit);
+	//_extData->calldata = g_ext->data.data();
 }
 
 EXPORT void ext_store(i256* _index, i256* _value)
diff --git a/evmcc/Ext.h b/evmcc/Ext.h
index 138028927..c44e5899b 100644
--- a/evmcc/Ext.h
+++ b/evmcc/Ext.h
@@ -25,6 +25,12 @@ public:
 	llvm::Value* callvalue();
 	llvm::Value* calldatasize();
 	llvm::Value* gasprice();
+	llvm::Value* prevhash();
+	llvm::Value* coinbase();
+	llvm::Value* timestamp();
+	llvm::Value* number();
+	llvm::Value* difficulty();
+	llvm::Value* gaslimit();
 
 	llvm::Value* balance(llvm::Value* _address);
 	llvm::Value* calldataload(llvm::Value* _index);
diff --git a/evmcc/bytecode/ext_test.evm b/evmcc/bytecode/ext_test.evm
index cdd04807f..c4a833296 100644
--- a/evmcc/bytecode/ext_test.evm
+++ b/evmcc/bytecode/ext_test.evm
@@ -1 +1 @@
-3031333234363a600035602635601335380060016002f2
+3031333234363a40414243444536600035602635601335380060016002f2
diff --git a/evmcc/lll/ext_test.lll b/evmcc/lll/ext_test.lll
index b0f3a4adb..85c0b236e 100644
--- a/evmcc/lll/ext_test.lll
+++ b/evmcc/lll/ext_test.lll
@@ -7,6 +7,13 @@ ORIGIN
 CALLVALUE
 CALLDATASIZE
 GASPRICE
+PREVHASH
+COINBASE
+TIMESTAMP
+NUMBER
+DIFFICULTY
+GASLIMIT
+CALLDATASIZE
 0
 CALLDATALOAD
 38