diff --git a/src/lib/netlist/devices/net_lib.cpp b/src/lib/netlist/devices/net_lib.cpp
index 30ddf3af84c..dd77be5a9a2 100644
--- a/src/lib/netlist/devices/net_lib.cpp
+++ b/src/lib/netlist/devices/net_lib.cpp
@@ -74,7 +74,7 @@ namespace netlist
 	ENTRYX(7485,                TTL_7485,               "+A0,+A1,+A2,+A3,+B0,+B1,+B2,+B3,+LTIN,+EQIN,+GTIN")
 	ENTRYX(7490,                TTL_7490,               "+A,+B,+R1,+R2,+R91,+R92")
 	ENTRYX(7493,                TTL_7493,               "+CLKA,+CLKB,+R1,+R2")
-	ENTRYX(7497,                TTL_7497,               "+CLK,+STRB,+EN,+UNITY,+CLR,+B0,+B1,+B2,+B3,+B4,+B5")
+	ENTRYX(7497,                TTL_7497,               "+CLK,+STRBQ,+ENQ,+UNITYQ,+CLR,+B0,+B1,+B2,+B3,+B4,+B5")
 	ENTRYX(74107,               TTL_74107,              "+CLK,+J,+K,+CLRQ")
 	ENTRYX(74107A,              TTL_74107A,             "+CLK,+J,+K,+CLRQ")
 	ENTRYX(74123,               TTL_74123,              "")
diff --git a/src/lib/netlist/devices/nlid_system.h b/src/lib/netlist/devices/nlid_system.h
index 881cce03592..5a874aef3df 100644
--- a/src/lib/netlist/devices/nlid_system.h
+++ b/src/lib/netlist/devices/nlid_system.h
@@ -136,7 +136,9 @@ namespace netlist
 				unsigned long total = 0;
 				for (unsigned i=0; i<m_size; i++)
 				{
-					pati[i] = static_cast<unsigned long>(plib::pstol(pat[i]));
+					// FIXME: use pstonum_ne
+					//pati[i] = plib::pstonum<decltype(pati[i])>(pat[i]);
+					pati[i] = plib::pstonum<unsigned long>(pat[i]);
 					total += pati[i];
 				}
 				netlist_time ttotal = netlist_time::zero();
diff --git a/src/lib/netlist/devices/nlid_truthtable.cpp b/src/lib/netlist/devices/nlid_truthtable.cpp
index c3449d5b604..dbb9401425d 100644
--- a/src/lib/netlist/devices/nlid_truthtable.cpp
+++ b/src/lib/netlist/devices/nlid_truthtable.cpp
@@ -407,7 +407,8 @@ void truthtable_parser::parse(const std::vector<pstring> &truthtable)
 				val.set(j);
 			else
 				nl_assert_always(outs == "0", "Unknown value (not 0 or 1");
-			netlist_time t = netlist_time::from_nsec(static_cast<unsigned long>(plib::pstol(plib::trim(times[j]))));
+			// FIXME: error handling
+			netlist_time t = netlist_time::from_nsec(plib::pstonum<unsigned long>(plib::trim(times[j])));
 			uint_least8_t k=0;
 			while (m_timing_nt[k] != netlist_time::zero() && m_timing_nt[k] != t)
 				k++;
diff --git a/src/lib/netlist/nl_base.cpp b/src/lib/netlist/nl_base.cpp
index 5b132ebd554..a0eabcc7fbe 100644
--- a/src/lib/netlist/nl_base.cpp
+++ b/src/lib/netlist/nl_base.cpp
@@ -343,8 +343,8 @@ void netlist_t::start()
 			auto p = setup().m_param_values.find(d->name() + ".HINT_NO_DEACTIVATE");
 			if (p != setup().m_param_values.end())
 			{
-				//FIXME: turn this into a proper function
-				auto v = plib::pstod(p->second);;
+				//FIXME: check for errors ...
+				double v = plib::pstonum<double>(p->second);;
 				if (std::abs(v - std::floor(v)) > 1e-6 )
 					log().fatal(MF_1_HND_VAL_NOT_SUPPORTED, p->second);
 				d->set_hint_deactivate(v == 0.0);
diff --git a/src/lib/netlist/nl_config.h b/src/lib/netlist/nl_config.h
index d2f4dc75511..20ddf5c71a3 100644
--- a/src/lib/netlist/nl_config.h
+++ b/src/lib/netlist/nl_config.h
@@ -26,7 +26,6 @@
  * linear memory pool. This is based of the assumption that
  * due to enhanced locality there will be less cache misses.
  * Your mileage may vary.
- * This will cause crashes on OSX and thus is ignored on OSX.
  *
  */
 #define USE_MEMPOOL                 (0)
diff --git a/src/lib/netlist/nl_parser.cpp b/src/lib/netlist/nl_parser.cpp
index a6a805826ce..1ff6ef6c6b7 100644
--- a/src/lib/netlist/nl_parser.cpp
+++ b/src/lib/netlist/nl_parser.cpp
@@ -403,7 +403,6 @@ nl_double parser_t::eval_param(const token_t tok)
 	int i;
 	int f=0;
 	nl_double ret;
-	pstring val;
 
 	for (i=1; i<6;i++)
 		if (tok.str() == macs[i])
@@ -416,9 +415,10 @@ nl_double parser_t::eval_param(const token_t tok)
 	}
 	else
 	{
-		val = tok.str();
-		if (!plib::pstod_ne(val, ret))
-			error(plib::pfmt("Parameter value <{1}> not double \n")(val));
+		bool err;
+		ret = plib::pstonum_ne<nl_double>(tok.str(), err);
+		if (err)
+			error(plib::pfmt("Parameter value <{1}> not double \n")(tok.str()));
 	}
 	return ret * facs[f];
 
diff --git a/src/lib/netlist/nl_setup.cpp b/src/lib/netlist/nl_setup.cpp
index cf89e4a8fae..28385d984cf 100644
--- a/src/lib/netlist/nl_setup.cpp
+++ b/src/lib/netlist/nl_setup.cpp
@@ -159,8 +159,9 @@ double setup_t::get_initial_param_val(const pstring &name, const double def)
 	auto i = m_param_values.find(name);
 	if (i != m_param_values.end())
 	{
-		double vald = 0;
-		if (!plib::pstod_ne(i->second, vald))
+		bool err = false;
+		double vald = plib::pstonum_ne<double>(i->second, err);
+		if (err)
 			log().fatal(MF_2_INVALID_NUMBER_CONVERSION_1_2, name, i->second);
 		return vald;
 	}
@@ -173,8 +174,9 @@ int setup_t::get_initial_param_val(const pstring &name, const int def)
 	auto i = m_param_values.find(name);
 	if (i != m_param_values.end())
 	{
-		long vald = 0;
-		if (!plib::pstod_ne(i->second, vald))
+		bool err;
+		double vald = plib::pstonum_ne<double>(i->second, err);
+		if (err)
 			log().fatal(MF_2_INVALID_NUMBER_CONVERSION_1_2, name, i->second);
 		if (vald - std::floor(vald) != 0.0)
 			log().fatal(MF_2_INVALID_NUMBER_CONVERSION_1_2, name, i->second);
@@ -872,7 +874,8 @@ nl_double setup_t::model_value(detail::model_map_t &map, const pstring &entity)
 	}
 	if (factor != NL_FCONST(1.0))
 		tmp = plib::left(tmp, tmp.size() - 1);
-	return plib::pstod(tmp) * factor;
+	// FIXME: check for errors
+	return plib::pstonum<nl_double>(tmp) * factor;
 }
 
 class logic_family_std_proxy_t : public logic_family_desc_t
diff --git a/src/lib/netlist/plib/pfunction.cpp b/src/lib/netlist/plib/pfunction.cpp
index e9e2de009c8..f2ef3522813 100644
--- a/src/lib/netlist/plib/pfunction.cpp
+++ b/src/lib/netlist/plib/pfunction.cpp
@@ -69,7 +69,9 @@ void pfunction::compile_postfix(const std::vector<pstring> &inputs,
 			if (rc.m_cmd != PUSH_INPUT)
 			{
 				rc.m_cmd = PUSH_CONST;
-				if (!plib::pstod_ne(cmd, rc.m_param))
+				bool err;
+				rc.m_param = plib::pstonum_ne<decltype(rc.m_param)>(cmd, err);
+				if (err)
 					throw plib::pexception(plib::pfmt("nld_function: unknown/misformatted token <{1}> in <{2}>")(cmd)(expr));
 				stk += 1;
 			}
diff --git a/src/lib/netlist/plib/poptions.cpp b/src/lib/netlist/plib/poptions.cpp
index d576eff0bb2..c790d1f55af 100644
--- a/src/lib/netlist/plib/poptions.cpp
+++ b/src/lib/netlist/plib/poptions.cpp
@@ -46,49 +46,13 @@ namespace plib {
 		return 0;
 	}
 
-	int option_str_limit::parse(const pstring &argument)
-	{
-		if (plib::container::contains(m_limit, argument))
-		{
-			m_val = argument;
-			return 0;
-		}
-		else
-			return 1;
-	}
-
 	int option_bool::parse(const pstring &argument)
 	{
+		unused_var(argument);
 		m_val = true;
 		return 0;
 	}
 
-	int option_double::parse(const pstring &argument)
-	{
-		try
-		{
-			m_val = plib::pstod(argument);
-			return 0;
-		}
-		catch (...)
-		{
-			return 1;
-		}
-	}
-
-	int option_long::parse(const pstring &argument)
-	{
-		try
-		{
-			m_val = plib::pstol(argument);
-			return 0;
-		}
-		catch (...)
-		{
-			return 1;
-		}
-	}
-
 	int option_vec::parse(const pstring &argument)
 	{
 		bool err = false;
@@ -233,7 +197,7 @@ namespace plib {
 					if (opt->has_argument())
 					{
 						line += "=";
-						option_str_limit *ol = dynamic_cast<option_str_limit *>(opt);
+						option_str_limit_base *ol = dynamic_cast<option_str_limit_base *>(opt);
 						if (ol)
 						{
 							for (auto &v : ol->limit())
diff --git a/src/lib/netlist/plib/poptions.h b/src/lib/netlist/plib/poptions.h
index 491ac0b4d91..f3be4b061dd 100644
--- a/src/lib/netlist/plib/poptions.h
+++ b/src/lib/netlist/plib/poptions.h
@@ -102,24 +102,52 @@ private:
 	pstring m_val;
 };
 
-class option_str_limit : public option
+class option_str_limit_base : public option
 {
 public:
-	option_str_limit(options &parent, pstring ashort, pstring along, pstring defval, pstring limit, pstring help)
-	: option(parent, ashort, along, help, true), m_val(defval)
-	, m_limit(plib::psplit(limit, ":"))
+	option_str_limit_base(options &parent, pstring ashort, pstring along, std::vector<pstring> &&limit, pstring help)
+	: option(parent, ashort, along, help, true)
+	, m_limit(limit)
+	{
+	}
+	const std::vector<pstring> &limit() const { return m_limit; }
+
+protected:
+
+private:
+	std::vector<pstring> m_limit;
+};
+
+
+template <typename T>
+class option_str_limit : public option_str_limit_base
+{
+public:
+	option_str_limit(options &parent, pstring ashort, pstring along, const T &defval, std::vector<pstring> &&limit, pstring help)
+	: option_str_limit_base(parent, ashort, along, std::move(limit), help), m_val(defval)
 	{
 	}
 
-	pstring operator ()() { return m_val; }
-	const std::vector<pstring> &limit() { return m_limit; }
+	T operator ()() { return m_val; }
+
+	pstring as_string() const { return limit()[m_val]; }
 
 protected:
-	virtual int parse(const pstring &argument) override;
+	virtual int parse(const pstring &argument) override
+	{
+		auto raw = plib::container::indexof(limit(), argument);
+
+		if (raw != plib::container::npos)
+		{
+			m_val = static_cast<T>(raw);
+			return 0;
+		}
+		else
+			return 1;
+	}
 
 private:
-	pstring m_val;
-	std::vector<pstring> m_limit;
+	T m_val;
 };
 
 class option_bool : public option
@@ -138,36 +166,34 @@ private:
 	bool m_val;
 };
 
-class option_double : public option
+template <typename T>
+class option_num : public option
 {
 public:
-	option_double(options &parent, pstring ashort, pstring along, double defval, pstring help)
-	: option(parent, ashort, along, help, true), m_val(defval)
+	option_num(options &parent, pstring ashort, pstring along, T defval,
+			pstring help,
+			T minval = std::numeric_limits<T>::min(),
+			T maxval = std::numeric_limits<T>::max() )
+	: option(parent, ashort, along, help, true)
+	, m_val(defval)
+	, m_min(minval)
+	, m_max(maxval)
 	{}
 
-	double operator ()() { return m_val; }
+	T operator ()() { return m_val; }
 
 protected:
-	virtual int parse(const pstring &argument) override;
+	virtual int parse(const pstring &argument) override
+	{
+		bool err;
+		m_val = pstonum_ne<T>(argument, err);
+		return (err ? 1 : (m_val < m_min || m_val > m_max));
+	}
 
 private:
-	double m_val;
-};
-
-class option_long : public option
-{
-public:
-	option_long(options &parent, pstring ashort, pstring along, long defval, pstring help)
-	: option(parent, ashort, along, help, true), m_val(defval)
-	{}
-
-	long operator ()() { return m_val; }
-
-protected:
-	virtual int parse(const pstring &argument) override;
-
-private:
-	long m_val;
+	T m_val;
+	T m_min;
+	T m_max;
 };
 
 class option_vec : public option
@@ -207,6 +233,17 @@ private:
 	static pstring split_paragraphs(pstring text, unsigned width, unsigned indent,
 			unsigned firstline_indent);
 
+	template <typename T>
+	T *getopt_type()
+	{
+		for (auto & optbase : m_opts )
+		{
+			if (auto opt = dynamic_cast<T *>(optbase))
+				return opt;
+		}
+		return nullptr;
+	}
+
 	option *getopt_short(pstring arg);
 	option *getopt_long(pstring arg);
 
diff --git a/src/lib/netlist/plib/pparser.cpp b/src/lib/netlist/plib/pparser.cpp
index 298fa589fba..b18b3265440 100644
--- a/src/lib/netlist/plib/pparser.cpp
+++ b/src/lib/netlist/plib/pparser.cpp
@@ -122,6 +122,7 @@ pstring ptokenizer::get_identifier_or_number()
 	return tok.str();
 }
 
+// FIXME: combine into template
 double ptokenizer::get_number_double()
 {
 	token_t tok = get_token();
@@ -129,9 +130,9 @@ double ptokenizer::get_number_double()
 	{
 		error(pfmt("Expected a number, got <{1}>")(tok.str()) );
 	}
-	double ret = 0.0;
-
-	if (!plib::pstod_ne(tok.str(), ret))
+	bool err;
+	double ret = plib::pstonum_ne<double>(tok.str(), err);
+	if (err)
 		error(pfmt("Expected a number, got <{1}>")(tok.str()) );
 	return ret;
 }
@@ -143,8 +144,9 @@ long ptokenizer::get_number_long()
 	{
 		error(pfmt("Expected a long int, got <{1}>")(tok.str()) );
 	}
-	long ret = 0;
-	if (!plib::pstol_ne(tok.str(), ret))
+	bool err;
+	long ret = plib::pstonum_ne<long>(tok.str(), err);
+	if (err)
 		error(pfmt("Expected a long int, got <{1}>")(tok.str()) );
 	return ret;
 }
@@ -326,7 +328,8 @@ double ppreprocessor::expr(const std::vector<pstring> &sexpr, std::size_t &start
 	else
 	{
 		tok=sexpr[start];
-		val = plib::pstod(tok);
+		// FIXME: error handling
+		val = plib::pstonum<decltype(val)>(tok);
 		start++;
 	}
 	while (start < sexpr.size())
diff --git a/src/lib/netlist/plib/pstring.h b/src/lib/netlist/plib/pstring.h
index 67104a54213..677ce9e43b8 100644
--- a/src/lib/netlist/plib/pstring.h
+++ b/src/lib/netlist/plib/pstring.h
@@ -9,8 +9,10 @@
 
 #include <cstring>
 #include <exception>
+#include <stdexcept>
 #include <iterator>
 #include <string>
+#include <limits>
 #include <type_traits>
 
 // ----------------------------------------------------------------------------------------
@@ -518,57 +520,72 @@ namespace plib
 		return pwstring(std::to_wstring(v));
 	}
 
-#if (PSTRING_USE_STD_STRING)
-	inline double pstod(const std::string &str, std::size_t *e = nullptr)
-	{
-		return std::stod(str, e);
-	}
-
-	inline long pstol(const std::string &str, std::size_t *e = nullptr, int base = 10)
-	{
-		return std::stol(str, e, base);
-	}
-#else
-	template<typename T>
-	double pstod(const T &str, std::size_t *e = nullptr)
-	{
-		return std::stod(str.cpp_string(), e);
-	}
+	template <typename T, typename E = void>
+	struct pstonum_helper;
 
 	template<typename T>
-	long pstol(const T &str, std::size_t *e = nullptr, int base = 10)
+	struct pstonum_helper<T, typename std::enable_if<std::is_integral<T>::value
+		&& std::is_signed<T>::value>::type>
 	{
-		return std::stol(str.cpp_string(), e, base);
-	}
-#endif
+		template <typename S>
+		long long operator()(const S &arg, std::size_t *idx)
+		{
+			return std::stoll(arg, idx);
+		}
+	};
 
-	template<typename T, typename R>
-	bool pstol_ne(const T &str, R &ret)
+	template<typename T>
+	struct pstonum_helper<T, typename std::enable_if<std::is_integral<T>::value
+		&& !std::is_signed<T>::value>::type>
+	{
+		template <typename S>
+		unsigned long long operator()(const S &arg, std::size_t *idx)
+		{
+			return std::stoull(arg, idx);
+		}
+	};
+
+	template<typename T>
+	struct pstonum_helper<T, typename std::enable_if<std::is_floating_point<T>::value>::type>
+	{
+		template <typename S>
+		long double operator()(const S &arg, std::size_t *idx)
+		{
+			return std::stold(arg, idx);
+		}
+	};
+
+	template<typename T, typename S>
+	T pstonum(const S &arg)
+	{
+		decltype(arg.c_str()) cstr = arg.c_str();
+		std::size_t idx(0);
+		auto ret = pstonum_helper<T>()(cstr, &idx);
+		if (ret >= std::numeric_limits<T>::lowest() && ret <= std::numeric_limits<T>::max())
+			//&& (ret == T(0) || std::abs(ret) >= std::numeric_limits<T>::min() ))
+		{
+			if (cstr[idx] != 0)
+				throw std::invalid_argument(std::string("Continuation after numeric value ends: ") + cstr);
+		}
+		else
+		{
+			throw std::out_of_range(std::string("Out of range: ") + cstr);
+		}
+		return static_cast<T>(ret);
+	}
+
+	template<typename R, typename T>
+	R pstonum_ne(const T &str, bool &err) noexcept
 	{
 		try
 		{
-			std::size_t e = 0;
-			ret = pstol(str, &e);
-			return str.c_str()[e] == 0;
+			err = false;
+			return pstonum<R>(str);
 		}
 		catch (...)
 		{
-			return false;
-		}
-	}
-
-	template<typename T, typename R>
-	bool pstod_ne(const T &str, R &ret)
-	{
-		try
-		{
-			std::size_t e = 0;
-			ret = pstod(str, &e);
-			return str.c_str()[e] == 0;
-		}
-		catch (...)
-		{
-			return false;
+			err = true;
+			return R(0);
 		}
 	}
 
diff --git a/src/lib/netlist/plib/putil.cpp b/src/lib/netlist/plib/putil.cpp
index 0d3a0ebca3f..92e0e6b3ab1 100644
--- a/src/lib/netlist/plib/putil.cpp
+++ b/src/lib/netlist/plib/putil.cpp
@@ -64,6 +64,36 @@ namespace plib
 		return ret;
 	}
 
+	std::vector<std::string> psplit_r(const std::string &stri,
+			const std::string &token,
+			const std::size_t maxsplit)
+	{
+		std::string str(stri);
+		std::vector<std::string> result;
+		std::size_t splits = 0;
+
+		while(str.size())
+		{
+			std::size_t index = str.rfind(token);
+			bool found = index!=std::string::npos;
+			if (found)
+				splits++;
+			if ((splits <= maxsplit || maxsplit == 0) && found)
+			{
+				result.push_back(str.substr(index+token.size()));
+				str = str.substr(0, index);
+				if (str.size()==0)
+					result.push_back(str);
+			}
+			else
+			{
+				result.push_back(str);
+				str = "";
+			}
+		}
+		return result;
+	}
+
 	std::vector<pstring> psplit(const pstring &str, const std::vector<pstring> &onstrl)
 	{
 		pstring col = "";
diff --git a/src/lib/netlist/plib/putil.h b/src/lib/netlist/plib/putil.h
index 8d59c0357e2..914d9820560 100644
--- a/src/lib/netlist/plib/putil.h
+++ b/src/lib/netlist/plib/putil.h
@@ -16,6 +16,11 @@
 
 namespace plib
 {
+
+	// Avoid unused variable warnings
+	template<typename... Ts>
+	inline void unused_var(Ts&&...) {}
+
 	namespace util
 	{
 		const pstring buildpath(std::initializer_list<pstring> list );
diff --git a/src/lib/netlist/prg/nltool.cpp b/src/lib/netlist/prg/nltool.cpp
index 4fcb4ebdc30..4395bd3bd17 100644
--- a/src/lib/netlist/prg/nltool.cpp
+++ b/src/lib/netlist/prg/nltool.cpp
@@ -23,7 +23,7 @@ public:
 	tool_app_t() :
 		plib::app(),
 		opt_grp1(*this,     "General options",              "The following options apply to all commands."),
-		opt_cmd (*this,     "c", "cmd",         "run",      "run:convert:listdevices:static:header:docheader", "run|convert|listdevices|static|header"),
+		opt_cmd (*this,     "c", "cmd",         0,		    std::vector<pstring>({"run","convert","listdevices","static","header","docheader"}), "run|convert|listdevices|static|header|docheader"),
 		opt_file(*this,     "f", "file",        "-",        "file to process (default is stdin)"),
 		opt_defines(*this,  "D", "define",                  "predefine value as macro, e.g. -Dname=value. If '=value' is omitted predefine it as 1. This option may be specified repeatedly."),
 		opt_rfolders(*this, "r", "rom",                     "where to look for data files"),
@@ -40,7 +40,7 @@ public:
 		opt_loadstate(*this,"",  "loadstate",   "",         "load state from file and continue from there"),
 		opt_savestate(*this,"",  "savestate",   "",         "save state to file at end of run"),
 		opt_grp4(*this,     "Options for convert command",  "These options are only used by the convert command."),
-		opt_type(*this,     "y", "type",        "spice",    "spice:eagle:rinf", "type of file to be converted: spice,eagle,rinf"),
+		opt_type(*this,     "y", "type",        0,          std::vector<pstring>({"spice","eagle","rinf"}), "type of file to be converted: spice,eagle,rinf"),
 
 		opt_ex1(*this,     "nltool -c run -t 3.5 -f nl_examples/cdelay.c -n cap_delay",
 				"Run netlist \"cap_delay\" from file nl_examples/cdelay.c for 3.5 seconds"),
@@ -49,7 +49,7 @@ public:
 		{}
 
 	plib::option_group  opt_grp1;
-	plib::option_str_limit opt_cmd;
+	plib::option_str_limit<unsigned> opt_cmd;
 	plib::option_str    opt_file;
 	plib::option_vec    opt_defines;
 	plib::option_vec    opt_rfolders;
@@ -60,13 +60,13 @@ public:
 	plib::option_group  opt_grp2;
 	plib::option_str    opt_name;
 	plib::option_group  opt_grp3;
-	plib::option_double opt_ttr;
+	plib::option_num<double> opt_ttr;
 	plib::option_vec    opt_logs;
 	plib::option_str    opt_inp;
 	plib::option_str    opt_loadstate;
 	plib::option_str    opt_savestate;
 	plib::option_group  opt_grp4;
-	plib::option_str_limit opt_type;
+	plib::option_str_limit<unsigned> opt_type;
 	plib::option_example opt_ex1;
 	plib::option_example opt_ex2;
 
@@ -706,7 +706,7 @@ int tool_app_t::execute()
 
 	try
 	{
-		pstring cmd = opt_cmd();
+		pstring cmd = opt_cmd.as_string();
 		if (cmd == "listdevices")
 			listdevices();
 		else if (cmd == "run")
@@ -734,19 +734,19 @@ int tool_app_t::execute()
 			contents = ostrm.str();
 
 			pstring result;
-			if (opt_type() == "spice")
+			if (opt_type.as_string() == "spice")
 			{
 				nl_convert_spice_t c;
 				c.convert(contents);
 				result = c.result();
 			}
-			else if (opt_type() == "eagle")
+			else if (opt_type.as_string() == "eagle")
 			{
 				nl_convert_eagle_t c;
 				c.convert(contents);
 				result = c.result();
 			}
-			else if (opt_type() == "rinf")
+			else if (opt_type.as_string() == "rinf")
 			{
 				nl_convert_rinf_t c;
 				c.convert(contents);
diff --git a/src/lib/netlist/prg/nlwav.cpp b/src/lib/netlist/prg/nlwav.cpp
index 23491e88349..a1f14692364 100644
--- a/src/lib/netlist/prg/nlwav.cpp
+++ b/src/lib/netlist/prg/nlwav.cpp
@@ -24,8 +24,8 @@ public:
 	{}
 	plib::option_str    opt_inp;
 	plib::option_str    opt_out;
-	plib::option_double opt_amp;
-	plib::option_long   opt_rate;
+	plib::option_num<double> opt_amp;
+	plib::option_num<long>   opt_rate;
 	plib::option_bool   opt_verb;
 	plib::option_bool   opt_quiet;
 	plib::option_bool   opt_version;
diff --git a/src/lib/netlist/solver/nld_solver.cpp b/src/lib/netlist/solver/nld_solver.cpp
index 2158d725694..ad62ba17c28 100644
--- a/src/lib/netlist/solver/nld_solver.cpp
+++ b/src/lib/netlist/solver/nld_solver.cpp
@@ -268,7 +268,7 @@ void NETLIB_NAME(solver)::post_start()
 	// Override log statistics
 	pstring p = plib::util::environment("NL_STATS", "");
 	if (p != "")
-		m_params.m_log_stats = plib::pstol(p);
+		m_params.m_log_stats = plib::pstonum<decltype(m_params.m_log_stats)>(p);
 	else
 		m_params.m_log_stats = m_log_stats();
 
diff --git a/src/lib/netlist/tools/nl_convert.cpp b/src/lib/netlist/tools/nl_convert.cpp
index aff7d0da81b..4488396a131 100644
--- a/src/lib/netlist/tools/nl_convert.cpp
+++ b/src/lib/netlist/tools/nl_convert.cpp
@@ -214,7 +214,7 @@ double nl_convert_base_t::get_sp_val(const pstring &sin)
 		++p;
 	pstring val = plib::left(sin, p);
 	pstring unit = sin.substr(p);
-	double ret = get_sp_unit(unit) * plib::pstod(val);
+	double ret = get_sp_unit(unit) * plib::pstonum<double>(val);
 	return ret;
 }
 
@@ -304,11 +304,12 @@ void nl_convert_spice_t::process_line(const pstring &line)
 				/* check for fourth terminal ... should be numeric net
 				 * including "0" or start with "N" (ltspice)
 				 */
-				long nval = 0;
 				pstring model;
 				pstring pins ="CBE";
+				bool err;
+				ATTR_UNUSED long nval = plib::pstonum_ne<long>(tt[4], err);
 
-				if ((!plib::pstol_ne(tt[4], nval) || plib::startsWith(tt[4], "N")) && tt.size() > 5)
+				if ((err || plib::startsWith(tt[4], "N")) && tt.size() > 5)
 					model = tt[5];
 				else
 					model = tt[4];
@@ -492,7 +493,7 @@ void nl_convert_eagle_t::convert(const pstring &contents)
 					else if (plib::ucase(sval) == "LOW")
 						add_device("TTL_INPUT", name, 0);
 					else
-						add_device("ANALOG_INPUT", name, plib::pstod(sval));
+						add_device("ANALOG_INPUT", name, plib::pstonum<double>(sval));
 					add_pin_alias(name, "1", "Q");
 					break;
 				case 'D':