do you user-defined literal? also some more notes on the digital scale (nw)

src/emu/mconfig.cpp

@@ -162,7 +162,7 @@ device_t *machine_config::device_add(device_t *owner, const char *tag, device_ty
 device_t *machine_config::device_add(device_t *owner, const char *tag, device_type type, const XTAL &clock)
 {
 	std::string msg = std::string("Instantiating device ") + tag;
-	clock.check(msg);
+	clock.validate(msg);
 	return device_add(owner, tag, type, clock.value());
 }
 
@@ -202,7 +202,7 @@ device_t *machine_config::device_replace(device_t *owner, const char *tag, devic
 device_t *machine_config::device_replace(device_t *owner, const char *tag, device_type type, const XTAL &clock)
 {
 	std::string msg = std::string("Replacing device ") + tag;
-	clock.check(msg);
+	clock.validate(msg);
 	return device_replace(owner, tag, type, clock.value());
 }
 

src/emu/xtal.cpp

@@ -96,6 +96,7 @@ const double XTAL::known_xtals[] = {
 	  4'915'200,
 	  5'000'000, /* Mutant Night */
 	  5'068'800, /* Usually used as MC2661 or COM8116 baud rate clock */
+	  5'185'000, /* Intel INTELLEC® 4 */
 	  5'460'000, /* ec1840 and ec1841 keyboard */
 	  5'529'600, /* Kontron PSI98 keyboard */
 	  5'626'000, /* RCA CDP1869 PAL dot clock */
@@ -343,7 +344,7 @@ double XTAL::last_correct_value = -1;
 double XTAL::xtal_error_low = 0;
 double XTAL::xtal_error_high = 0;
 
-bool XTAL::check(double base_clock)
+bool XTAL::validate(double base_clock)
 {
 	if(base_clock == last_correct_value)
 		return true;
@@ -396,15 +397,15 @@ bool XTAL::check(double base_clock)
 	return false;
 }
 
-void XTAL::check(const char *message) const
+void XTAL::validate(const char *message) const
 {
-	if(!check(m_base_clock))
+	if(!validate(m_base_clock))
 		fail(m_base_clock, message);
 }
 
-void XTAL::check(const std::string &message) const
+void XTAL::validate(const std::string &message) const
 {
-	if(!check(m_base_clock))
+	if(!validate(m_base_clock))
 		fail(m_base_clock, message);
 }
 
@@ -545,7 +546,6 @@ reveals the following shipping frequencies as of 1/1/2008:
 5.000MHz
 5.0688MHz
 5.120MHz
-5.185MHz
 5.223438MHz
 5.5MHz
 5.5296MHz

src/emu/xtal.h

@@ -64,8 +64,8 @@ public:
 	friend constexpr XTAL operator *(unsigned int mult, const XTAL &xtal);
 	friend constexpr XTAL operator *(double       mult, const XTAL &xtal);
 
-	void check(const char *message) const;
+	void validate(const char *message) const;
-	void check(const std::string &message) const;
+	void validate(const std::string &message) const;
 
 private:
 	double m_base_clock, m_current_clock;
@@ -75,7 +75,7 @@ private:
 	static const double known_xtals[];
 	static double last_correct_value, xtal_error_low, xtal_error_high;
 	static void fail(double base_clock, std::string message);
-	static bool check(double base_clock);
+	static bool validate(double base_clock);
 	static void check_ordering();
 };
 
@@ -86,4 +86,8 @@ constexpr XTAL operator *(int          mult, const XTAL &xtal) { return XTAL(xta
 constexpr XTAL operator *(unsigned int mult, const XTAL &xtal) { return XTAL(xtal.base(), mult * xtal.dvalue()); }
 constexpr XTAL operator *(double       mult, const XTAL &xtal) { return XTAL(xtal.base(), mult * xtal.dvalue()); }
 
+constexpr XTAL operator ""_Hz_XTAL(long double clock) { return XTAL(double(clock)); }
+constexpr XTAL operator ""_kHz_XTAL(long double clock) { return XTAL(double(clock * 1e3)); }
+constexpr XTAL operator ""_MHz_XTAL(long double clock) { return XTAL(double(clock * 1e6)); }
+
 #endif // MAME_EMU_DRIVERS_XTAL_H

src/mame/drivers/intellec4.cpp

@@ -1040,7 +1040,7 @@ private:
 ----------------------------------*/
 
 MACHINE_CONFIG_DERIVED(mod4_state::mod4, intellec4)
-	MCFG_CPU_ADD("maincpu", I4004, 5185000. / 7)
+	MCFG_CPU_ADD("maincpu", I4004, 5.185_MHz_XTAL / 7)
 	MCFG_I4004_ROM_MAP(intellec4_rom)
 	MCFG_I4004_RAM_MEMORY_MAP(intellec4_ram_memory)
 	MCFG_I4004_ROM_PORTS_MAP(intellec4_rom_ports)
@@ -1231,7 +1231,7 @@ private:
 ----------------------------------*/
 
 MACHINE_CONFIG_DERIVED(mod40_state::mod40, intellec4)
-	MCFG_CPU_ADD("maincpu", I4040, 5185000. / 7)
+	MCFG_CPU_ADD("maincpu", I4040, 5.185_MHz_XTAL / 7)
 	MCFG_I4040_ROM_MAP(intellec4_rom)
 	MCFG_I4040_RAM_MEMORY_MAP(intellec4_ram_memory)
 	MCFG_I4040_ROM_PORTS_MAP(intellec4_rom_ports)

src/mame/drivers/osborne1.cpp

@@ -98,7 +98,7 @@ TODO:
 #include "softlist.h"
 
 
-#define MAIN_CLOCK  XTAL(15'974'400)
+static constexpr XTAL MAIN_CLOCK = 15.9744_MHz_XTAL;
 
 
 static ADDRESS_MAP_START( osborne1_mem, AS_PROGRAM, 8, osborne1_state )

src/mame/drivers/sartorius.cpp

@@ -2,8 +2,9 @@
 /*
  Sartorius 3733 digital scale
 
- Visible ICs:
+ Mainboard:
- * Intel D4040 CPU
+ * 4194.304 kHz crystal
+ * Intel D4040 4-bit CPU
  * Intel D4289 8-bit memory controller
  * 2 * Intel P4002-1 (64+16)*4 RAM (sockets for 2 * Intel P4002-2 unpopulated)
  * 2 * 2708 1k*8 ROM labelled "129/0" and "129/1"
@@ -11,15 +12,38 @@
  * Intersil IM6561AIJN 256*4 CMOS RAM
  * RCA CD4007AE dual complementary pair plus inverter
  * National Semicondictor CD4049CN hex inverting buffer
+ * Intel P4201A clock generator
  * 4 * Motorola MC14099B 8-bit addressable latch
  * 2 * RCA CD4052BE 2-channel 4:1 analog switch
 
+ Display board (connects to mainboard via 28-pin edge connector):
+ * MM74C42 1-of-10 decoder
+ * RCA CD4071BE Quad 2-input OR gate
+ * RCA CD4011BE Quad 2-input NAND gate
+ * RCA CD4055BE BCD to 7-segment decoder with high-voltage outputs
+ * 12 TO-92 transistors near the MM74C42 and CD4071BE
+ * 7 TO-92 transistors near the CD4011BE
+ * 7 TO-92 transistors near the CD4055BE
+
  Front panel has a digital display, an "R" button for switching between
  300g and 3kg ranges, and a T button for zeroing.  Rear panel has a
  three-position rotary switch to select between standalone operation and
  data acquisition modes, and a 50-pin micro ribbon connector for data
  communication.
 
+ The vacuum fluorescent display has seven 7-segment digits, each of
+ which can be followed by a . (stop) or , (comma) for digit grouping or
+ decimal point.  The last digit can also show the vulgar fraction ½
+ using the G segment as the fraction bar and additional 1 and 2 segments
+ (these could potentially be used independently as well).  To the right
+ of the least significant digit, the display can show % (percent) or g
+ (lowecase G).  To the legt of the leftmost digit, the display has,
+ from top to bottom, + (plus), - (minus), and a small circle.
+
+ Strangely, the P4201A clock generator IC is a long way from the
+ crystal.  The mode pin is tied to Vss, putting it in divide-by-seven
+ mode.
+
  No dates or other ASCII strings in program ROM.  IC date codes up to
  1978.
  */