diff --git a/src/lib/netlist/build/makefile b/src/lib/netlist/build/makefile
index 8f07a8b92d1..5f5352d0c69 100644
--- a/src/lib/netlist/build/makefile
+++ b/src/lib/netlist/build/makefile
@@ -26,7 +26,7 @@ DOC = $(SRC)/documentation
 
 TIDY_FLAGSX = -checks=*,-google*,-hicpp*,readability*,-fuchsia*,cert-*,-android-*,
 TIDY_FLAGSX += -llvm-header-guard,-cppcoreguidelines-pro-type-reinterpret-cast,
-#TIDY_FLAGSX += -cppcoreguidelines-pro-bounds-pointer-arithmetic,
+TIDY_FLAGSX += -cppcoreguidelines-pro-bounds-pointer-arithmetic,
 #TIDY_FLAGSX += -cppcoreguidelines-owning-memory,
 TIDY_FLAGSX += -modernize-use-default-member-init,-cppcoreguidelines-pro-bounds-constant-array-index,
 TIDY_FLAGSX += -modernize-pass-by-value,-cppcoreguidelines-pro-type-static-cast-downcast,
@@ -39,7 +39,7 @@ TIDY_FLAGSX += -bugprone-too-small-loop-variable,
 TIDY_FLAGSX += -modernize-use-trailing-return-type,
 TIDY_FLAGSX += -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
 TIDY_FLAGSX += -readability-magic-numbers,-readability-braces-around-statements,
-#TIDY_FLAGSX += -readability-implicit-bool-conversion,
+TIDY_FLAGSX += -readability-implicit-bool-conversion,
 TIDY_FLAGSX += -readability-named-parameter,-readability-function-size,
 TIDY_FLAGSX += -llvmlibc-restrict-system-libc-headers,-llvmlibc-implementation-in-namespace,-llvmlibc-callee-namespace,
 #TIDY_FLAGSX += -cppcoreguidelines-avoid-non-const-global-variables
@@ -232,7 +232,7 @@ ALL_TIDY_FILES = $(ALL_OBJS:.o=.json)
 SOURCES = $(patsubst $(OBJ)%, $(SRC)%, $(ALL_OBJS:.o=.cpp))
 ALLFILES = $(SOURCES) $(VSBUILDS) $(DOCS)
 
-MAKEFILE_TARGETS_WITHOUT_INCLUDE := gcc9 clang clang-5 mingw doc native maketree
+MAKEFILE_TARGETS_WITHOUT_INCLUDE := gcc9 clang clang-5 mingw doc native maketree tidy
 
 
 # git archive HEAD --prefix=project-name-version/ \
@@ -317,7 +317,7 @@ nvcc:
 	$(MAKE) CC=/usr/local/cuda-10.2/bin/nvcc LD=/usr/local/cuda-10.2/bin/nvcc \
 		OBJ=obj/nvcc CEXTRAFLAGS="--std c++14 -x cu  -DNVCCBUILD=102 --expt-extended-lambda \
 		--expt-relaxed-constexpr --default-stream per-thread --restrict \
-		--ftemplate-depth 1024 \
+		--ftemplate-depth 1024  \
 		-Xcompiler -O6 -Xcompiler -march=native -ccbin g++-8 " \
 		DEPENDCC=g++
 
diff --git a/src/lib/netlist/devices/nld_74123.cpp b/src/lib/netlist/devices/nld_74123.cpp
index 5b667934f31..e3b73c86d86 100644
--- a/src/lib/netlist/devices/nld_74123.cpp
+++ b/src/lib/netlist/devices/nld_74123.cpp
@@ -35,16 +35,16 @@ namespace netlist
 		, m_RI(*this, "RI", nlconst::magic(400.0)) // around 250 for HC series, 400 on LS/TTL, estimated from datasheets
 		{
 
-			register_subalias("GND", m_RN.m_R.N());
-			register_subalias("VCC", m_RP.m_R.P());
-			register_subalias("C",   m_RN.m_R.N());
-			register_subalias("RC",  m_RN.m_R.P());
+			register_subalias("GND", m_RN.N());
+			register_subalias("VCC", m_RP.P());
+			register_subalias("C",   m_RN.N());
+			register_subalias("RC",  m_RN.P());
 
-			connect(m_RP_Q, m_RP.m_I);
-			connect(m_RN_Q, m_RN.m_I);
+			connect(m_RP_Q, m_RP.I());
+			connect(m_RN_Q, m_RN.I());
 
-			connect(m_RN.m_R.P(), m_RP.m_R.N());
-			connect(m_CV, m_RN.m_R.P());
+			connect(m_RN.P(), m_RP.N());
+			connect(m_CV, m_RN.P());
 
 			m_RP.m_RON.set(m_RI());
 			m_RN.m_RON.set(m_RI());
@@ -102,7 +102,7 @@ namespace netlist
 
 			if (m_state == 1)
 			{
-				const nl_fptype vLow = m_KP * m_RP.m_R.P()();
+				const nl_fptype vLow = m_KP * m_RP.P()();
 				if (m_CV() < vLow)
 				{
 					m_RN_Q.push(0, NLTIME_FROM_NS(10)); // R_OFF
@@ -111,7 +111,7 @@ namespace netlist
 			}
 			if (m_state == 2)
 			{
-				const nl_fptype vHigh = m_RP.m_R.P()() * (nlconst::one() - m_KP);
+				const nl_fptype vHigh = m_RP.P()() * (nlconst::one() - m_KP);
 				if (m_CV() > vHigh)
 				{
 					m_RP_Q.push(0, NLTIME_FROM_NS(10)); // R_OFF
@@ -172,20 +172,20 @@ namespace netlist
 			register_subalias("3", m_A.m_CLRQ);
 			register_subalias("4", m_A.m_QQ);
 			register_subalias("5", m_B.m_Q);
-			register_subalias("6", m_B.m_RN.m_R.N());
-			register_subalias("7", m_B.m_RN.m_R.P());
-			register_subalias("8", m_A.m_RN.m_R.N());
-			connect(m_A.m_RN.m_R.N(), m_B.m_RN.m_R.N());
+			register_subalias("6", m_B.m_RN.N());
+			register_subalias("7", m_B.m_RN.P());
+			register_subalias("8", m_A.m_RN.N());
+			connect(m_A.m_RN.N(), m_B.m_RN.N());
 
 			register_subalias("9", m_B.m_A);
 			register_subalias("10", m_B.m_B);
 			register_subalias("11", m_B.m_CLRQ);
 			register_subalias("12", m_B.m_QQ);
 			register_subalias("13", m_A.m_Q);
-			register_subalias("14", m_A.m_RN.m_R.N());
-			register_subalias("15", m_A.m_RN.m_R.P());
-			register_subalias("16", m_A.m_RP.m_R.P());
-			connect(m_A.m_RP.m_R.P(), m_B.m_RP.m_R.P());
+			register_subalias("14", m_A.m_RN.N());
+			register_subalias("15", m_A.m_RN.P());
+			register_subalias("16", m_A.m_RP.P());
+			connect(m_A.m_RP.P(), m_B.m_RP.P());
 		}
 		NETLIB_RESETI() {}
 		NETLIB_UPDATEI() {}
@@ -200,25 +200,25 @@ namespace netlist
 		, m_A(*this, "A")
 		, m_B(*this, "B")
 		{
-			register_subalias("1", m_A.m_RN.m_R.N()); // C1
-			register_subalias("2", m_A.m_RN.m_R.P()); // RC1
+			register_subalias("1", m_A.m_RN.N()); // C1
+			register_subalias("2", m_A.m_RN.P()); // RC1
 			register_subalias("3", m_A.m_CLRQ);
 			register_subalias("4", m_A.m_B);
 			register_subalias("5", m_A.m_A);
 			register_subalias("6", m_A.m_Q);
 			register_subalias("7", m_A.m_QQ);
-			register_subalias("8", m_A.m_RN.m_R.N());
-			connect(m_A.m_RN.m_R.N(), m_B.m_RN.m_R.N());
+			register_subalias("8", m_A.m_RN.N());
+			connect(m_A.m_RN.N(), m_B.m_RN.N());
 
 			register_subalias("9", m_B.m_QQ);
 			register_subalias("10", m_B.m_Q);
 			register_subalias("11", m_B.m_A);
 			register_subalias("12", m_B.m_B);
 			register_subalias("13", m_B.m_CLRQ);
-			register_subalias("14", m_B.m_RN.m_R.P()); // RC2
-			register_subalias("15", m_B.m_RN.m_R.N()); // C2
-			register_subalias("16", m_A.m_RP.m_R.P());
-			connect(m_A.m_RP.m_R.P(), m_B.m_RP.m_R.P());
+			register_subalias("14", m_B.m_RN.P()); // RC2
+			register_subalias("15", m_B.m_RN.N()); // C2
+			register_subalias("16", m_A.m_RP.P());
+			connect(m_A.m_RP.P(), m_B.m_RP.P());
 		}
 		NETLIB_RESETI() { }
 		NETLIB_UPDATEI() { }
@@ -233,25 +233,25 @@ namespace netlist
 		, m_A(*this, "A")
 		, m_B(*this, "B")
 		{
-			register_subalias("1", m_A.m_RN.m_R.N()); // C1
-			register_subalias("2", m_A.m_RN.m_R.P()); // RC1
+			register_subalias("1", m_A.m_RN.N()); // C1
+			register_subalias("2", m_A.m_RN.P()); // RC1
 			register_subalias("3", m_A.m_CLRQ);
 			register_subalias("4", m_A.m_A);
 			register_subalias("5", m_A.m_B);
 			register_subalias("6", m_A.m_Q);
 			register_subalias("7", m_A.m_QQ);
-			register_subalias("8", m_A.m_RN.m_R.N());
-			connect(m_A.m_RN.m_R.N(), m_B.m_RN.m_R.N());
+			register_subalias("8", m_A.m_RN.N());
+			connect(m_A.m_RN.N(), m_B.m_RN.N());
 
 			register_subalias("9", m_B.m_QQ);
 			register_subalias("10", m_B.m_Q);
 			register_subalias("11", m_B.m_B);
 			register_subalias("12", m_B.m_A);
 			register_subalias("13", m_B.m_CLRQ);
-			register_subalias("14", m_B.m_RN.m_R.P()); // RC2
-			register_subalias("15", m_B.m_RN.m_R.N()); // C2
-			register_subalias("16", m_A.m_RP.m_R.P());
-			connect(m_A.m_RP.m_R.P(), m_B.m_RP.m_R.P());
+			register_subalias("14", m_B.m_RN.P()); // RC2
+			register_subalias("15", m_B.m_RN.N()); // C2
+			register_subalias("16", m_A.m_RP.P());
+			connect(m_A.m_RP.P(), m_B.m_RP.P());
 		}
 		NETLIB_RESETI();
 		NETLIB_UPDATEI();
diff --git a/src/lib/netlist/devices/nlid_system.h b/src/lib/netlist/devices/nlid_system.h
index e7827f24935..97a3c68e2b8 100644
--- a/src/lib/netlist/devices/nlid_system.h
+++ b/src/lib/netlist/devices/nlid_system.h
@@ -395,10 +395,10 @@ namespace devices
 	{
 	public:
 		NETLIB_CONSTRUCTOR(sys_dsw1)
-		, m_R(*this, "_R")
-		, m_I(*this, "I")
 		, m_RON(*this, "RON", nlconst::one())
 		, m_ROFF(*this, "ROFF", nlconst::magic(1.0E20))
+		, m_R(*this, "_R")
+		, m_I(*this, "I")
 		, m_last_state(*this, "m_last_state", 0)
 		{
 			register_subalias("1", m_R.P());
@@ -428,13 +428,19 @@ namespace devices
 
 		//NETLIB_UPDATE_PARAMI();
 
-		// used by 74123
-		analog::NETLIB_SUB(R_base) m_R;
-		logic_input_t m_I;
+		//FIXME: used by 74123
+
+		const terminal_t &P() const noexcept { return m_R.P(); }
+		const terminal_t &N() const noexcept { return m_R.N(); }
+		const logic_input_t &I() const noexcept { return m_I; }
+
 		param_fp_t m_RON;
 		param_fp_t m_ROFF;
 
 	private:
+		analog::NETLIB_SUB(R_base) m_R;
+		logic_input_t m_I;
+
 		state_var<netlist_sig_t> m_last_state;
 	};
 
@@ -451,7 +457,6 @@ namespace devices
 		, m_I(*this, "I")
 		, m_GON(*this, "GON", nlconst::magic(1e9)) // FIXME: all switches should have some on value
 		, m_GOFF(*this, "GOFF", nlconst::cgmin())
-		, m_last_state(*this, "m_last_state", 0)
 		, m_power_pins(*this)
 		{
 			// connect and register pins
@@ -463,7 +468,6 @@ namespace devices
 
 		NETLIB_RESETI()
 		{
-			m_last_state = 1;
 			m_R1.set_G(m_GOFF());
 			m_R2.set_G(m_GON());
 		}
@@ -471,45 +475,40 @@ namespace devices
 		NETLIB_UPDATEI()
 		{
 			const netlist_sig_t state = m_I();
-			// FIXME: update should only be called if m_I changes
-			if (true || (state != m_last_state))
+
+			//printf("Here %d\n", state);
+			const nl_fptype G1 = (state != 0) ? m_GON() : m_GOFF();
+			const nl_fptype G2 = (state != 0) ? m_GOFF() : m_GON();
+			if (m_R1.solver() == m_R2.solver())
 			{
-				m_last_state = state;
-				//printf("Here %d\n", state);
-				const nl_fptype G1 = (state != 0) ? m_GON() : m_GOFF();
-				const nl_fptype G2 = (state != 0) ? m_GOFF() : m_GON();
-				if (m_R1.solver() == m_R2.solver())
+				m_R1.change_state([this, &G1, &G2]()
 				{
-					m_R1.change_state([this, &G1, &G2]()
-					{
-						m_R1.set_G(G1);
-						m_R2.set_G(G2);
-					});
-				}
-				else
+					m_R1.set_G(G1);
+					m_R2.set_G(G2);
+				});
+			}
+			else
+			{
+				m_R1.change_state([this, &G1]()
 				{
-					m_R1.change_state([this, &G1]()
-					{
-						m_R1.set_G(G1);
-					});
-					m_R2.change_state([this, &G2]()
-					{
-						m_R2.set_G(G2);
-					});
-				}
+					m_R1.set_G(G1);
+				});
+				m_R2.change_state([this, &G2]()
+				{
+					m_R2.set_G(G2);
+				});
 			}
 		}
 
 		//NETLIB_UPDATE_PARAMI();
 
+	private:
 		analog::NETLIB_SUB(R_base) m_R1;
 		analog::NETLIB_SUB(R_base) m_R2;
 		logic_input_t m_I;
 		param_fp_t m_GON;
 		param_fp_t m_GOFF;
 
-	private:
-		state_var<netlist_sig_t> m_last_state;
 		nld_power_pins m_power_pins;
 	};
 
@@ -550,13 +549,13 @@ namespace devices
 
 		//NETLIB_UPDATE_PARAMI();
 
+	private:
 		analog_input_t m_IP;
 		analog_input_t m_IN;
 		logic_output_t m_Q;
 		logic_output_t m_QQ;
 		nld_power_pins m_power_pins;
 
-	private:
 		state_var<netlist_sig_t> m_last_state;
 	};
 
diff --git a/src/lib/netlist/nl_base.h b/src/lib/netlist/nl_base.h
index 53d9eb9cdfd..9bccb152c67 100644
--- a/src/lib/netlist/nl_base.h
+++ b/src/lib/netlist/nl_base.h
@@ -1053,13 +1053,13 @@ namespace netlist
 		/// templatized generic device models do not have to do tons of
 		/// template magic.
 		///
-		/// This function throws an exception if actually called.
+		/// This function terminates if actually called.
 		///
 		[[noreturn]] static void set_tristate(netlist_sig_t v,
 			netlist_time ts_off_on, netlist_time ts_on_off)
 		{
 			plib::unused_var(v, ts_off_on, ts_on_off);
-			throw nl_exception("set_tristate on logic_output should never be called!");
+			plib::terminate("set_tristate on logic_output should never be called!");
 		}
 	private:
 		logic_net_t m_my_net;
diff --git a/src/lib/netlist/plib/penum.h b/src/lib/netlist/plib/penum.h
index 1e0042f7dd2..ff15c9252c0 100644
--- a/src/lib/netlist/plib/penum.h
+++ b/src/lib/netlist/plib/penum.h
@@ -33,7 +33,6 @@ namespace plib
 	struct ename : public plib::penum_base { \
 		enum E { __VA_ARGS__ }; \
 		constexpr ename (const E &v) : m_v(v) { } \
-		constexpr ename (E && v) : m_v(v) { } \
 		template <typename T> explicit constexpr ename(const T &val) { m_v = static_cast<E>(val); } \
 		template <typename T> explicit constexpr ename(T && val) { m_v = static_cast<E>(val); } \
 		bool set_from_string (const pstring &s) { \