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(MESS) megadriv.c: added support for Legend of Wukong [Fabio Priuli]
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Fabio Priuli
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@ -25747,6 +25747,20 @@ Notice that these are not working on real hardware due to bugged code with VDP i
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</software>
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<software name="wukong">
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<description>Legend of Wukong (Euro, USA)</description>
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<year>2008</year>
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<publisher>Super Fighter Team</publisher>
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<part name="cart" interface="megadriv_cart">
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<feature name="slot" value="rom_wukong" />
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<dataarea name="rom" size="2228224">
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<rom name="legend of wukong (unl).bin" size="2228224" crc="72f11771" sha1="4ef41e4caccab118014abb8e079c7e5668a4f468" offset="000000" loadflag="load16_word_swap" />
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</dataarea>
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<dataarea name="sram" size="16384">
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</dataarea>
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</part>
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</software>
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<software name="wukongc" cloneof="wukong">
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<description>Wu Kong Wai Zhuan (Chi)</description>
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<year>1996</year>
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<publisher>Ming</publisher>
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@ -26120,7 +26134,7 @@ Notice that these are not working on real hardware due to bugged code with VDP i
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</software>
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<software name="beggarp">
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<description>Beggar Prince (USA)</description>
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<description>Beggar Prince (Euro, USA)</description>
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<year>2005</year>
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<publisher>Super Fighter Team</publisher>
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<part name="cart" interface="megadriv_cart">
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@ -305,6 +305,7 @@ static SLOT_INTERFACE_START(md_cart)
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SLOT_INTERFACE_INTERNAL("rom_fram", MD_ROM_FRAM)
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SLOT_INTERFACE_INTERNAL("rom_hardbl95", MD_ROM_SRAM)
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SLOT_INTERFACE_INTERNAL("rom_beggar", MD_ROM_SRAM)
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SLOT_INTERFACE_INTERNAL("rom_wukong", MD_ROM_WUKONG)
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// EEPROM handling (not supported fully yet)
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SLOT_INTERFACE_INTERNAL("rom_eeprom", MD_STD_EEPROM)
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SLOT_INTERFACE_INTERNAL("rom_nbajam", MD_EEPROM_NBAJAM)
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@ -48,6 +48,7 @@ const device_type MD_ROM_REDCL = &device_creator<md_rom_redcl_device>;
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const device_type MD_ROM_SQUIR = &device_creator<md_rom_squir_device>;
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const device_type MD_ROM_TOPF = &device_creator<md_rom_topf_device>;
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const device_type MD_ROM_RADICA = &device_creator<md_rom_radica_device>;
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const device_type MD_ROM_WUKONG = &device_creator<md_rom_wukong_device>;
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md_std_rom_device::md_std_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock)
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@ -192,6 +193,11 @@ md_rom_radica_device::md_rom_radica_device(const machine_config &mconfig, const
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{
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}
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md_rom_wukong_device::md_rom_wukong_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
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: md_std_rom_device(mconfig, MD_ROM_WUKONG, "MD Legend of Wukong", tag, owner, clock)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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@ -286,6 +292,12 @@ void md_rom_radica_device::device_start()
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save_item(NAME(m_bank));
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}
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void md_rom_wukong_device::device_start()
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{
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m_mode = 0;
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save_item(NAME(m_mode));
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}
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/*-------------------------------------------------
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mapper specific handlers
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-------------------------------------------------*/
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@ -1042,3 +1054,55 @@ READ16_MEMBER(md_rom_radica_device::read_a13)
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m_bank = offset & 0x3f;
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return 0;
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}
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/*-------------------------------------------------
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LEGEND OF WUKONG
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This game uses cart which is the same as SEGA_SRAM
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+ bankswitch mechanism for last 128k of the image:
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first 2MB of ROM is loaded in 0-0x200000 and
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mirrored in 0x200000-0x400000, but depending on
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bit7 of the value written at 0xe00/2 accesses to
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0x200000-0x21ffff go either to the "physical" address
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(i.e. last 128K of ROM) or to the "memory" address
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(i.e. mirror of first 128K)
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-------------------------------------------------*/
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READ16_MEMBER(md_rom_wukong_device::read)
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{
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if (offset >= m_nvram_start/2 && offset <= m_nvram_end/2 && m_nvram_active)
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return m_nvram[offset - m_nvram_start/2];
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// here can access both last 128K of the ROM and the first 128K, depending of bit7 of m_mode
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if (offset >= 0x200000/2 && offset < 0x220000/2)
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return !m_mode ? m_rom[offset] : m_rom[offset & 0xffff];
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else if (offset < 0x400000/2)
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return m_rom[offset & 0xfffff];
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else
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return 0xffff;
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}
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WRITE16_MEMBER(md_rom_wukong_device::write)
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{
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if (offset < 0x100000/2) // it actually writes to 0xe00/2
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m_mode = BIT(data, 7);
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if (offset >= m_nvram_start/2 && offset <= m_nvram_end/2 && m_nvram_active && !m_nvram_readonly)
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m_nvram[offset - m_nvram_start/2] = data;
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}
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WRITE16_MEMBER(md_rom_wukong_device::write_a13)
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{
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if (offset == 0xf0/2)
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{
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/* unsure if this is actually supposed to toggle or just switch on? yet to encounter game that uses this */
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m_nvram_active = BIT(data, 0);
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m_nvram_readonly = BIT(data, 1);
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// since a lot of generic carts ends up here if loaded from fullpath
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// we turn on nvram (with m_nvram_handlers_installed) only if they toggle it on by writing here!
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if (m_nvram_active)
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m_nvram_handlers_installed = 1;
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}
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}
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@ -483,6 +483,26 @@ private:
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UINT8 m_bank;
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};
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// ======================> md_rom_wukong_device
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class md_rom_wukong_device : public md_std_rom_device
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{
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public:
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// construction/destruction
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md_rom_wukong_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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// device-level overrides
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virtual void device_start();
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virtual void device_config_complete() { m_shortname = "md_rom_wukong"; }
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// reading and writing
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virtual DECLARE_READ16_MEMBER(read);
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virtual DECLARE_WRITE16_MEMBER(write);
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virtual DECLARE_WRITE16_MEMBER(write_a13);
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UINT8 m_mode;
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};
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// device type definition
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@ -513,5 +533,6 @@ extern const device_type MD_ROM_SSF2;
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extern const device_type MD_ROM_SQUIR;
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extern const device_type MD_ROM_TOPF;
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extern const device_type MD_ROM_RADICA;
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extern const device_type MD_ROM_WUKONG;
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#endif
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@ -241,6 +241,7 @@ static const md_slot slot_list[] =
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{ SEGA_FRAM, "rom_fram" },
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{ HARDBALL95, "rom_hardbl95" },
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{ BEGGAR, "rom_beggar"},
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{ WUKONG, "rom_wukong"},
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{ SEGA_EEPROM, "rom_eeprom" },
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{ NBA_JAM, "rom_nbajam" },
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@ -639,6 +640,12 @@ void base_md_cart_slot_device::setup_nvram()
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m_cart->m_nvram_active = 1;
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m_cart->m_nvram_handlers_installed = 1;
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break;
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case WUKONG:
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m_cart->m_nvram_start = 0x3c0000;
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m_cart->m_nvram_end = m_cart->m_nvram_start + 0x3fff;
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m_cart->nvram_alloc(machine(), m_cart->m_nvram_end - m_cart->m_nvram_start + 1);
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m_cart->m_nvram_active = 1;
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break;
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}
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}
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@ -22,6 +22,7 @@ enum
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SEGA_SRAM, SEGA_FRAM,
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HARDBALL95, /* Hardball 95 uses different sram start address */
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BEGGAR, /* Beggar Prince / Xin Qigai Wangzi uses different sram start address and has no valid header */
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WUKONG, /* Legend of Wukong uses different sram start address + bankswitch trick for last 128K of ROM */
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// EEPROM
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SEGA_EEPROM, /* Wonder Boy V / Evander Holyfield's Boxing / Greatest Heavyweights of the Ring / Sports Talk Baseball / Megaman */
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