Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-21 07:52:35 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

gamecom: added sound channels 0 and 1 (quality is poor). Added temp patch to stop the mad flickering in some games.

Browse Source
This commit is contained in:
Robbbert 2016-05-20 02:36:23 +10:00
parent b583b8a14f
commit f2c7981401
2 changed files with 53 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/mame/includes/gamecom.h
View File

@ -240,6 +240,8 @@ public:
DECLARE_PALETTE_INIT(gamecom);
INTERRUPT_GEN_MEMBER(gamecom_interrupt);
TIMER_CALLBACK_MEMBER(gamecom_clock_timer_callback);
TIMER_CALLBACK_MEMBER(gamecom_sound0_timer_callback);
TIMER_CALLBACK_MEMBER(gamecom_sound1_timer_callback);
TIMER_CALLBACK_MEMBER(gamecom_scanline);
DECLARE_WRITE8_MEMBER( gamecom_handle_dma );
DECLARE_WRITE8_MEMBER( gamecom_update_timers );
@ -252,11 +254,15 @@ private:
UINT8 m_lcdc_reg;
UINT8 m_lch_reg;
UINT8 m_lcv_reg;
UINT8 m_sound0_cnt;
UINT8 m_sound1_cnt;
UINT16 m_scanline;
UINT16 m_base_address;
memory_region *m_cart1_rom;
memory_region *m_cart2_rom;
emu_timer *m_clock_timer;
emu_timer *m_sound0_timer;
emu_timer *m_sound1_timer;
emu_timer *m_scanline_timer;
GAMECOM_DMA m_dma;
GAMECOM_TIMER m_timer[2];

48
src/mame/machine/gamecom.cpp
View File

@ -14,6 +14,46 @@ TIMER_CALLBACK_MEMBER(gamecom_state::gamecom_clock_timer_callback)
m_maincpu->set_input_line(sm8500_cpu_device::CK_INT, ASSERT_LINE );
}
TIMER_CALLBACK_MEMBER(gamecom_state::gamecom_sound0_timer_callback)
{
if (m_sound0_cnt > 0x3f)
{
if (m_sound.sg0t > 0)
{
m_sound0_timer->adjust(attotime::from_hz(2764800/m_sound.sg0t), 0, attotime::from_hz(2764800/m_sound.sg0t));
if ((m_sound.sgc & 0x81) == 0x81)
m_sound0_cnt = 0;
}
}
if (m_sound0_cnt < 0x40)
{
bool which_half = BIT(m_sound0_cnt, 0);
UINT8 sb = m_sound.sg0w[m_sound0_cnt >> 1];
m_dac->write_unsigned8((which_half ? sb >> 4 : sb & 15)^8);
m_sound0_cnt++;
}
}
TIMER_CALLBACK_MEMBER(gamecom_state::gamecom_sound1_timer_callback)
{
if (m_sound1_cnt > 0x3f)
{
if (m_sound.sg1t > 0)
{
m_sound1_timer->adjust(attotime::from_hz(2764800/m_sound.sg1t), 0, attotime::from_hz(2764800/m_sound.sg1t));
if ((m_sound.sgc & 0x82) == 0x82)
m_sound1_cnt = 0;
}
}
if (m_sound1_cnt < 0x40)
{
bool which_half = BIT(m_sound1_cnt, 0);
UINT8 sb = m_sound.sg1w[m_sound1_cnt >> 1];
m_dac->write_unsigned8((which_half ? sb >> 4 : sb & 15)^8);
m_sound1_cnt++;
}
}
void gamecom_state::machine_reset()
{
UINT8 *rom = m_region_kernel->base();
@ -26,6 +66,8 @@ void gamecom_state::machine_reset()
m_lch_reg = 0x07;
m_lcv_reg = 0x27;
m_lcdc_reg = 0xb0;
m_sound0_cnt = 0x40;
m_sound1_cnt = 0x40;
std::string region_tag;
m_cart1_rom = memregion(region_tag.assign(m_cart1->tag()).append(GENERIC_ROM_REGION_TAG).c_str());
@ -561,7 +603,7 @@ WRITE8_MEMBER( gamecom_state::gamecom_update_timers )
if ( m_p_ram[SM8521_TM0D] >= m_timer[0].check_value )
{
m_p_ram[SM8521_TM0D] = 0;
m_maincpu->set_input_line(sm8500_cpu_device::TIM0_INT, ASSERT_LINE );
// m_maincpu->set_input_line(sm8500_cpu_device::TIM0_INT, ASSERT_LINE ); // this causes crazy flickering
}
}
}
@ -584,6 +626,10 @@ WRITE8_MEMBER( gamecom_state::gamecom_update_timers )
DRIVER_INIT_MEMBER(gamecom_state,gamecom)
{
m_clock_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gamecom_state::gamecom_clock_timer_callback),this));
m_sound0_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gamecom_state::gamecom_sound0_timer_callback),this));
m_sound1_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gamecom_state::gamecom_sound1_timer_callback),this));
m_sound0_timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1));
m_sound1_timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1));
m_p_ram = m_region_maincpu->base(); // required here because pio_w gets called before machine_reset
}