bus/nes: Added partial code for unlicensed game Dragon Fighter. (#8833)

hash/nes.xml

@@ -63349,8 +63349,8 @@ preliminary proto for the PAL version, still running on NTSC systems) or the gfx
 		<year>19??</year>
 		<publisher>Flying Star</publisher>
 		<part name="cart" interface="nes_cart">
-			<feature name="slot" value="unl_drgnfgt" />
+			<feature name="slot" value="bmw8544" />
-			<feature name="pcb" value="UNL-DRAGONFIGHTER" />
+			<feature name="pcb_model" value="BMW8544" />
 			<dataarea name="chr" size="524288">
 				<rom name="dragon fighter (unl)[u].chr" size="524288" crc="a62e97c9" sha1="af094d6a93241ea2702fb5b946fd5d789af5dd8f" offset="00000" status="baddump" />
 			</dataarea>

src/devices/bus/nes/mmc3_clones.cpp

@@ -29,6 +29,7 @@
 //-------------------------------------------------
 
 DEFINE_DEVICE_TYPE(NES_NITRA,         nes_nitra_device,         "nes_nitra",         "NES Cart Nitra PCB")
+DEFINE_DEVICE_TYPE(NES_BMW8544,       nes_bmw8544_device,       "nes_bmw8544",       "NES Cart BMW8544 PCB")
 DEFINE_DEVICE_TYPE(NES_FS6,           nes_fs6_device,           "nes_fs6",           "NES Cart Fight Street VI PCB")
 DEFINE_DEVICE_TYPE(NES_SBROS11,       nes_sbros11_device,       "nes_smb11",         "NES Cart SMB 11 PCB")
 DEFINE_DEVICE_TYPE(NES_MALISB,        nes_malisb_device,        "nes_malisb",        "NES Cart Mali Splash Bomb PCB")
@@ -128,6 +129,11 @@ nes_nitra_device::nes_nitra_device(const machine_config &mconfig, const char *ta
 {
 }
 
+nes_bmw8544_device::nes_bmw8544_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: nes_txrom_device(mconfig, NES_BMW8544, tag, owner, clock), m_reg(0)
+{
+}
+
 nes_fs6_device::nes_fs6_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
 	: nes_txrom_device(mconfig, NES_FS6, tag, owner, clock)
 {
@@ -437,6 +443,23 @@ nes_coolboy_device::nes_coolboy_device(const machine_config &mconfig, const char
 {
 }
 
+
+
+
+void nes_bmw8544_device::device_start()
+{
+	mmc3_start();
+	save_item(NAME(m_reg));
+}
+
+void nes_bmw8544_device::pcb_reset()
+{
+	m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM;
+
+	m_reg = 0;
+	mmc3_common_initialize(0x0f, 0xff, 0);
+}
+
 void nes_family4646_device::device_start()
 {
 	mmc3_start();
@@ -1030,6 +1053,42 @@ void nes_nitra_device::write_h(offs_t offset, uint8_t data)
 	txrom_write((offset & 0x6000) | ((offset & 0x400) >> 10), offset & 0xff);
 }
 
+/*-------------------------------------------------
+
+ Board BMW8544
+
+ Games: Dragon Fighter (Flying Star)
+
+ MMC3 clone with poorly understood PRG/CHR banking.
+
+ NES 2.0: mapper 292
+
+ In MAME: Not supported.
+
+ -------------------------------------------------*/
+
+void nes_bmw8544_device::set_prg(int prg_base, int prg_mask)
+{
+	nes_txrom_device::set_prg(prg_base, prg_mask);
+	prg8_89(m_reg);
+}
+
+u8 nes_bmw8544_device::read_m(offs_t offset)
+{
+//	LOG_MMC(("bmw8544 read_m, offset: %04x\n", offset));
+
+	// CHR banking may be done by reads in this address range
+
+	return nes_txrom_device::read_m(offset);
+}
+
+void nes_bmw8544_device::write_m(offs_t offset, u8 data)
+{
+	LOG_MMC(("bmw8544 write_m, offset: %04x, data: %02x\n", offset, data));
+	m_reg = data;
+	prg8_89(data);
+}
+
 /*-------------------------------------------------
 
  Board UNL-FS6

src/devices/bus/nes/mmc3_clones.h

@@ -21,6 +21,30 @@ public:
 };
 
 
+// ======================> nes_bmw8544_device
+
+class nes_bmw8544_device : public nes_txrom_device
+{
+public:
+	// construction/destruction
+	nes_bmw8544_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+	virtual u8 read_m(offs_t offset) override;
+	virtual void write_m(offs_t offset, u8 data) override;
+
+	virtual void pcb_reset() override;
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+
+	virtual void set_prg(int prg_base, int prg_mask) override;
+
+private:
+	u8 m_reg;
+};
+
+
 // ======================> nes_fs6_device
 
 class nes_fs6_device : public nes_txrom_device
@@ -1119,6 +1143,7 @@ private:
 
 // device type definition
 DECLARE_DEVICE_TYPE(NES_NITRA,         nes_nitra_device)
+DECLARE_DEVICE_TYPE(NES_BMW8544,       nes_bmw8544_device)
 DECLARE_DEVICE_TYPE(NES_FS6,           nes_fs6_device)
 DECLARE_DEVICE_TYPE(NES_SBROS11,       nes_sbros11_device)
 DECLARE_DEVICE_TYPE(NES_MALISB,        nes_malisb_device)

src/devices/bus/nes/nes_carts.cpp

@@ -343,6 +343,7 @@ void nes_cart(device_slot_interface &device)
 	device.option_add_internal("somari",           NES_SOMARI); // mapper 116
 	device.option_add_internal("huang2",           NES_HUANG2); // mapper 116 also
 	device.option_add_internal("nitra",            NES_NITRA);
+	device.option_add_internal("bmw8544",          NES_BMW8544);
 	device.option_add_internal("fs6",              NES_FS6); // mapper 196 alt? (for Street Fighter VI / Fight Street VI);
 	device.option_add_internal("sbros11",          NES_SBROS11);
 	device.option_add_internal("unl_malisb",       NES_MALISB); //  used by Super Mali Splash Bomb

src/devices/bus/nes/nes_ines.hxx

@@ -327,9 +327,9 @@ static const nes_mmc mmc_list[] =
 	{ 289, BMC_60311C },
 	{ 290, BMC_NTD_03 },
 	{ 291, BMC_NT639 },
-	// { 292, UNL_DRAGONFIGHTER }, in nes.xml, not emulated yet
+	{ 292, UNL_BMW8544 },          // Dragon Fighter by Flying Star
 	// 293 NewStar multicarts, do we have these in nes.xml?
-	{ 294, BMC_FAMILY_4646 },    // FIXME: is this really exactly the same as mapper 134?
+	{ 294, BMC_FAMILY_4646 },      // FIXME: is this really exactly the same as mapper 134?
 	// 295 JY multicarts not yet in nes.xml
 	// 296 VT3x handhelds
 	{ 297, TXC_22110 },            // 2-in-1 Uzi Lightgun

src/devices/bus/nes/nes_pcb.hxx

@@ -229,6 +229,7 @@ static const nes_pcb pcb_list[] =
 	{ "somari",           SOMARI_SL12 },  // mapper 116
 	{ "huang2",           SOMARI_HUANG2 },  // mapper 116 also
 	{ "nitra",            NITRA_TDA },
+	{ "bmw8544",          UNL_BMW8544 },
 	{ "fs6",              UNL_FS6 },  // mapper 196 alt? (for Street Fighter VI / Fight Street VI },
 	{ "sbros11",          BTL_SBROS11 },
 	{ "family4646",       BMC_FAMILY_4646 },
@@ -396,7 +397,6 @@ static const nes_pcb pcb_list[] =
 	{ "onebus",           UNSUPPORTED_BOARD },
 	{ "coolboy",          UNSUPPORTED_BOARD },
 	{ "pec586",           UNSUPPORTED_BOARD },
-	{ "unl_drgnfgt",      UNSUPPORTED_BOARD },  // Dragon Fighter by Flying Star
 	{ "test",             TEST_BOARD },
 	{ "unknown",          UNKNOWN_BOARD }  //  a few pirate dumps uses the wrong mapper...
 };

src/devices/bus/nes/nes_slot.h

@@ -116,7 +116,7 @@ enum
 	UNL_SF3, UNL_RACERMATE, UNL_EDU2K,
 	UNL_STUDYNGAME, UNL_603_5052, UNL_H2288, UNL_158B, UNL_2708,
 	UNL_MALISB, UNL_AC08, UNL_A9746, UNL_43272, UNL_TF1201, UNL_TH21311,
-	UNL_CITYFIGHT, UNL_NINJARYU, UNL_EH8813A, UNL_RT01,
+	UNL_BMW8544, UNL_CITYFIGHT, UNL_NINJARYU, UNL_EH8813A, UNL_RT01,
 	// Bootleg boards
 	BTL_0353, BTL_09034A, BTL_2YUDB, BTL_900218, BTL_AISENSHINICOL,
 	BTL_BATMANFS, BTL_CONTRAJ, BTL_DRAGONNINJA, BTL_L001, BTL_MARIOBABY,