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https://github.com/holub/mame
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nb1412m2.cpp: improved sound capabilities, makes Mighty Guy to have a sense sound wise [Angelo Salese]
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angelosa
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ad05858554
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6f4314a305
@ -14,8 +14,9 @@ It is unknown at current stage if inside the chip there's a MCU
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(with internal ROM).
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TODO:
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- understand how Mighty Guy decrypts data (uses port adjuster in a
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different way than the other games);
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- double check Mighty Guy port adjuster data;
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- implement DAC (reads data from ROM);
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- timer is handtuned;
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Legacy notes from drivers:
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- m_mAmazonProtReg[4] bit 0 used on hiscore data (clear on code),
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@ -91,19 +92,28 @@ DEFINE_DEVICE_TYPE(NB1412M2, nb1412m2_device, "nb1412m2", "NB1412M2 Mahjong Cust
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void nb1412m2_device::nb1412m2_map(address_map &map)
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{
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map(0x32, 0x32).w(this,FUNC(nb1412m2_device::rom_op_w));
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map(0x33, 0x34).w(this,FUNC(nb1412m2_device::rom_address_w));
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map(0x35, 0x36).w(this,FUNC(nb1412m2_device::rom_adjust_w));
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map(0x37, 0x37).r(this,FUNC(nb1412m2_device::rom_decrypt_r));
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// data decrypter
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map(0x32, 0x32).w(this, FUNC(nb1412m2_device::rom_op_w));
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map(0x33, 0x34).w(this, FUNC(nb1412m2_device::rom_address_w));
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map(0x35, 0x36).w(this, FUNC(nb1412m2_device::rom_adjust_w));
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map(0x37, 0x37).r(this, FUNC(nb1412m2_device::rom_decrypt_r));
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map(0x40, 0x40).nopw();
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map(0x41, 0x41).r(this,FUNC(nb1412m2_device::timer_r)).nopw();
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map(0x42, 0x43).nopw();
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// timer
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map(0x40, 0x40).w(this, FUNC(nb1412m2_device::timer_w));
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map(0x41, 0x41).rw(this, FUNC(nb1412m2_device::timer_r), FUNC(nb1412m2_device::timer_ack_w));
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map(0x42, 0x43).nopw(); // always 0x03
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map(0x92, 0x92).ram(); // latch?
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map(0x94, 0x94).rw(this,FUNC(nb1412m2_device::xor_r),FUNC(nb1412m2_device::xor_w));
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// DAC control
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map(0x11, 0x11).nopw(); // - unknown (volume/channel control?)
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map(0x18, 0x18).nopw(); // ^ unknown
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map(0x51, 0x52).nopw(); // start address
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// 16-bit registers (1=upper), more latches?
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// latches?
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map(0x90, 0x90).rw(this, FUNC(nb1412m2_device::const90_r),FUNC(nb1412m2_device::const90_w)); //ram();
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map(0x92, 0x92).ram();
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map(0x94, 0x94).ram(); //rw(this,FUNC(nb1412m2_device::xor_r),FUNC(nb1412m2_device::xor_w));
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// 16-bit registers (1=upper address), more latches?
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map(0xa0, 0xa1).ram();
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map(0xa2, 0xa3).ram();
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}
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@ -137,7 +147,12 @@ void nb1412m2_device::device_start()
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save_item(NAME(m_rom_address));
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save_item(NAME(m_adj_address));
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save_item(NAME(m_rom_op));
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save_item(NAME(m_xor));
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save_item(NAME(m_timer_reg));
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save_item(NAME(m_const90));
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m_timer = timer_alloc(TIMER_MAIN);
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m_timer->adjust(attotime::never);
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}
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@ -151,9 +166,22 @@ void nb1412m2_device::device_reset()
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m_rom_address = 0;
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m_adj_address = 0;
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m_rom_op = 0;
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m_xor = 0;
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m_const90 = 0;
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m_timer_reg = false;
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}
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void nb1412m2_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch (id)
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{
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case TIMER_MAIN:
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m_timer_reg = true;
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m_timer->adjust(attotime::never);
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break;
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default:
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assert_always(false, "Unknown id in nb1412m2_device::device_timer");
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}
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}
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//**************************************************************************
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// READ/WRITE HANDLERS
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@ -161,6 +189,10 @@ void nb1412m2_device::device_reset()
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WRITE8_MEMBER( nb1412m2_device::rom_op_w )
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{
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// TODO: data == 2 starts DAC playback?
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// if(data != 5)
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// printf("%02x rom_op\n",data);
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m_rom_op = data;
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}
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@ -195,10 +227,33 @@ WRITE8_MEMBER( nb1412m2_device::rom_adjust_w )
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// readback from ROM data
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READ8_MEMBER( nb1412m2_device::rom_decrypt_r )
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{
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// TODO: provided by commands 0x35 & 0x36 (maybe 0x32 too)
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uint8_t prot_adj = m_data[m_adj_address] == 0xff ? 0x44 : 0x82;
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uint8_t prot_adj;
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// printf("%02x %04x %02x\n",m_data[m_adj_address],m_adj_address,m_rom_op);
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// TODO: provided by commands 0x35 & 0x36 (maybe 0x32 too)
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switch(m_data[m_adj_address])
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{
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// common, most games uses this
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case 0xff:
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prot_adj = 0x44;
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break;
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// Mighty Guy specific
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case 0x86: // SFXs
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prot_adj = 0xbd;
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break;
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case 0x94: // BGM
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prot_adj = 0xaf; // 0xef
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break;
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case 0x00: // DAC
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prot_adj = 0x43; // matches address 0x840 at POST (first valid 8-bit data for DAC)
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//machine().debug_break();
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break;
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default:
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prot_adj = 0;
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popmessage("nb1412m2: prot adjust %02x, contact MAMEdev",m_data[m_adj_address]);
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break;
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}
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// printf("%02x %04x %04x %02x\n",m_data[m_adj_address],m_rom_address,m_adj_address,m_rom_op);
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return m_data[m_rom_address & 0x1fff] - prot_adj;
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}
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@ -206,19 +261,31 @@ READ8_MEMBER( nb1412m2_device::rom_decrypt_r )
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// Mighty Guy specifics
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READ8_MEMBER( nb1412m2_device::timer_r )
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{
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// return (this->clock().cycles() / 0x34) & 1; // wrong
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return machine().rand() & 1;
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return m_timer_reg == true;
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}
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WRITE8_MEMBER( nb1412m2_device::xor_w )
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WRITE8_MEMBER( nb1412m2_device::timer_w )
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{
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m_xor = data ^ m_xor;
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// TODO: timing of this, this port is always 1?
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m_timer->adjust(attotime::from_usec(800));
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}
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READ8_MEMBER( nb1412m2_device::xor_r )
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WRITE8_MEMBER( nb1412m2_device::timer_ack_w )
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{
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// write 0xaa, reads back if register is equal to 0xaa (xor reg?)
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return m_xor;
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m_timer_reg = false;
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m_timer->adjust(attotime::never);
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}
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// controls music tempo
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READ8_MEMBER( nb1412m2_device::const90_r )
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{
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// TODO: likely wrong
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return m_const90+0x08;
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}
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WRITE8_MEMBER( nb1412m2_device::const90_w )
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{
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m_const90 = data;
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}
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// public accessors
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@ -43,9 +43,12 @@ public:
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DECLARE_WRITE8_MEMBER( rom_op_w );
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DECLARE_WRITE8_MEMBER( rom_adjust_w );
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DECLARE_READ8_MEMBER( timer_r );
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DECLARE_READ8_MEMBER( xor_r );
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DECLARE_WRITE8_MEMBER( xor_w );
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DECLARE_WRITE8_MEMBER( timer_w );
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DECLARE_WRITE8_MEMBER( timer_ack_w );
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DECLARE_READ8_MEMBER( const90_r );
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DECLARE_WRITE8_MEMBER( const90_w );
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void nb1412m2_map(address_map &map);
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protected:
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// device-level overrides
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@ -53,6 +56,7 @@ protected:
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// virtual void device_add_mconfig(machine_config &config) override;
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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virtual space_config_vector memory_space_config() const override;
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private:
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@ -60,10 +64,14 @@ private:
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uint16_t m_rom_address;
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uint16_t m_adj_address;
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uint8_t m_rom_op;
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uint8_t m_xor;
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bool m_timer_reg;
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const address_space_config m_space_config;
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emu_timer *m_timer;
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uint8_t m_const90;
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required_region_ptr<uint8_t> m_data;
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static const device_timer_id TIMER_MAIN = 1;
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};
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