move fidelity SC6 rom externally to softwarelist, as in original machine (nw)

hash/fidel_sc6.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!DOCTYPE softwarelist SYSTEM "softwarelist.dtd">
+
+<softwarelist name="fidel_sc6" description="Fidelity SC6 Modules">
+
+<!-- Sensory Chess Challenger 6 -->
+
+	<software name="sc6">
+		<description>SC6: original program</description>
+		<year>1982</year>
+		<publisher>Fidelity Electronics</publisher>
+		<part name="cart" interface="fidel_sc6">
+			<dataarea name="rom" size="0x1000">
+				<rom name="101-1035a01" size="0x1000" crc="0024971f" sha1="76b16364913ada2fb94b9e6a8524b924e6832ddf" offset="0x0000" /> <!-- 2332 -->
+			</dataarea>
+		</part>
+	</software>
+
+</softwarelist>

src/mame/drivers/fidelmcs48.cpp

@@ -21,6 +21,13 @@ Sensory Chess Challenger 6 (model SC6):
 - external 4KB ROM 2332 101-1035A01, in module slot
 - buzzer, 2 7seg LEDs, 8*8 chessboard buttons
 
+released modules, * denotes not dumped yet:
+- *BO6: Book Openings I
+- *CG6: Greatest Chess Games 1
+- SC6: pack-in, original program
+
+SC6 program is contained in BO6 and CG6.
+
 ******************************************************************************/
 
 #include "emu.h"
@@ -52,6 +59,7 @@ private:
 	DECLARE_READ_LINE_MEMBER(sc6_input6_r);
 	DECLARE_READ_LINE_MEMBER(sc6_input7_r);
 	void sc6_map(address_map &map);
+	DECLARE_DEVICE_IMAGE_LOAD_MEMBER(sc6_cartridge);
 };
 
 
@@ -62,6 +70,26 @@ private:
     SC6
 ******************************************************************************/
 
+// cartridge
+
+DEVICE_IMAGE_LOAD_MEMBER(fidelmcs48_state, sc6_cartridge)
+{
+	u32 size = m_cart->common_get_size("rom");
+
+	// 4KB ROM only?
+	if (size != 0x1000)
+	{
+		image.seterror(IMAGE_ERROR_UNSPECIFIED, "Invalid file size");
+		return image_init_result::FAIL;
+	}
+
+	m_cart->rom_alloc(size, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE);
+	m_cart->common_load_rom(m_cart->get_rom_base(), size, "rom");
+
+	return image_init_result::PASS;
+}
+
+
 // MCU ports/generic
 
 void fidelmcs48_state::sc6_prepare_display()
@@ -120,7 +148,7 @@ READ_LINE_MEMBER(fidelmcs48_state::sc6_input7_r)
 
 void fidelmcs48_state::sc6_map(address_map &map)
 {
-	map(0x0000, 0x0fff).rom();
+	map(0x0000, 0x0fff).r("cartslot", FUNC(generic_slot_device::read_rom));
 }
 
 
@@ -169,6 +197,13 @@ void fidelmcs48_state::sc6(machine_config &config)
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref", 0));
 	vref.set_output(5.0);
 	vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
+
+	/* cartridge */
+	generic_cartslot_device &cartslot(GENERIC_CARTSLOT(config, "cartslot", generic_plain_slot, "fidel_sc6", "bin"));
+	cartslot.set_device_load(device_image_load_delegate(&fidelmcs48_state::device_image_load_sc6_cartridge, this));
+	cartslot.set_must_be_loaded(true);
+
+	SOFTWARE_LIST(config, "cart_list").set_original("fidel_sc6");
 }
 
 
@@ -178,8 +213,8 @@ void fidelmcs48_state::sc6(machine_config &config)
 ******************************************************************************/
 
 ROM_START( fscc6 )
-	ROM_REGION( 0x1000, "maincpu", 0 )
-	ROM_LOAD("101-1035a01", 0x0000, 0x1000, CRC(0024971f) SHA1(76b16364913ada2fb94b9e6a8524b924e6832ddf) ) // 2332
+	ROM_REGION( 0x1000, "maincpu", ROMREGION_ERASE00 )
+	// none here, it's in the module slot
 ROM_END
 
 

src/mame/drivers/fidelz80.cpp

@@ -37,7 +37,6 @@
     - Fidelity Challenger Printer - thermal printer, MCU=D8048C243
 
     Program/data cartridges, for various boards, some cross-compatible:
-    - CG6: Greatest Chess Games 1
     - CAC: Challenger Advanced Chess - 8KB 101-1038A01
     - CB9: Challenger Book Openings 1 - 8KB (label not known)
     - CB16: Challenger Book Openings 2 - 8+8KB 101-1042A01,02