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minor tweaks to the new ymf278b

This commit is contained in:
dinkc64 2014-06-30 19:53:17 +00:00
parent 27f9ac6868
commit 61959f0d9b
2 changed files with 36 additions and 38 deletions
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2
src/burn/snd/burn_ymf278b.cpp
View File

@ -189,7 +189,7 @@ void BurnYMF278BReset()
if (!DebugSnd_YMF278BInitted) bprintf(PRINT_ERROR, _T("BurnYMF278BReset called without init\n"));
#endif
ymf278b_reset();
ymf278b_reset();
BurnTimerReset();
}

72
src/burn/snd/ymf278b.c
View File

@ -74,7 +74,7 @@
#define LOG(x) logerror x;
typedef struct
typedef struct
{
INT16 wave; /* wavetable number */
INT16 F_NUMBER; /* frequency */
@ -115,7 +115,7 @@
int num; /* slot number (for debug only) */
} YMF278BSlot;
// internal state
// internal state
UINT8 m_pcmregs[256];
YMF278BSlot m_slots[24];
INT8 m_wavetblhdr;
@ -250,7 +250,7 @@ static void compute_envelope(YMF278BSlot *slot)
slot->env_vol = 256U<<23;
slot->env_vol_lim = (256U<<23) - 1;
if (rate==63)
if (rate==63)
{
// immediate
LOG(("YMF278B: Attack skipped - "));
@ -515,7 +515,7 @@ static void A_w(int num, UINT8 reg, UINT8 data)
//if (data != m_timer_a_count) - this breaks FBA if uncommented
{
m_timer_a_count = data;
ymf278b_timer_a_reset(num);
ymf278b_timer_a_reset(num);
}
break;
@ -525,7 +525,7 @@ static void A_w(int num, UINT8 reg, UINT8 data)
//if (data != m_timer_b_count) - same here.
{
m_timer_b_count = data;
ymf278b_timer_b_reset(num);
ymf278b_timer_b_reset(num);
}
break;
@ -538,13 +538,12 @@ static void A_w(int num, UINT8 reg, UINT8 data)
// reset timers
if((m_enable ^ data) & 1)
{
ymf278b_timer_a_reset(num);
ymf278b_timer_a_reset(num);
}
if((m_enable ^ data) & 2)
{
ymf278b_timer_b_reset(num);
}
ymf278b_timer_b_reset(num);
}
m_enable = data;
m_current_irq &= ~data;
@ -966,8 +965,8 @@ void ymf278b_reset()
// clear registers
//for (i = 0; i <= 4; i++)
// A_w(0, i, 0); // causes weird errors because the cpu not open
// at the time its called and this accesses the timer.
// A_w(0, i, 0); // causes weird errors because the cpu is not open
// at the time ymf278b_reset() is called and A_w() accesses the timer.
B_w(0, 5, 0);
for (i = 0; i < 8; i++)
C_w(0, i, 0);
@ -1002,16 +1001,16 @@ void ymf278b_reset()
compute_envelope(slot);
}
// ymf278b_timer_a_reset(0);
// ymf278b_timer_b_reset(0);
//m_timer_a->reset();
// ymf278b_timer_a_reset(0); - not necessary -dink
// ymf278b_timer_b_reset(0); ""
//m_timer_a->reset();
//m_timer_b->reset();
/*m_timer_busy->reset();*/ m_status_busy = 0;
/*m_timer_ld->reset();*/ m_status_ld = 0;
m_irq_line = 0;
m_current_irq = 0;
// if (m_irq_handler)
// if (m_irq_handler) - not necessary -dink
// m_irq_handler(0, 0);
}
@ -1110,7 +1109,6 @@ static void precompute_rate_tables()
// device_start - device-specific startup
//-------------------------------------------------
//void ymf278b_device::device_start()
int ymf278b_start(int num, UINT8 *rom, void (*irq_cb)(int, int), void (*timer_cb)(int, int, double), int clock, int rate)
{
int i;
@ -1119,16 +1117,16 @@ int ymf278b_start(int num, UINT8 *rom, void (*irq_cb)(int, int), void (*timer_cb
m_romsize = 0xffffffff; //romsize;
m_clock = clock;
m_irq_handler = irq_cb;
timer_callback = timer_cb;
timer_callback = timer_cb;
/*m_timer_base = attotime::from_hz(m_clock) * (19*36);
/*m_timer_base = attotime::from_hz(m_clock) * (19*36); - we use different timers -dink
m_timer_a = timer_alloc(TIMER_A);
m_timer_b = timer_alloc(TIMER_B);
m_timer_busy = timer_alloc(TIMER_BUSY_CLEAR);
m_timer_ld = timer_alloc(TIMER_LD_CLEAR); */
m_timer_ld = timer_alloc(TIMER_LD_CLEAR); */
m_clock_ratio = (float)clock / (float)YMF278B_STD_CLOCK;
m_sample_rate = rate;
m_sample_rate = rate;
for (i = 0; i < 24; i++)
{
@ -1136,7 +1134,7 @@ int ymf278b_start(int num, UINT8 *rom, void (*irq_cb)(int, int), void (*timer_cb
}
//m_stream = machine().sound().stream_alloc(*this, 0, 2, clock()/768);
m_mix_buffer = malloc(sizeof(INT32)*48000*2);
m_mix_buffer = malloc(sizeof(INT32)*48000*2); // this driver only supports 44100, but set the buffersize to 48000 just incase someone uses this in their FBA settings.
// rate tables
precompute_rate_tables();
@ -1160,30 +1158,30 @@ int ymf278b_start(int num, UINT8 *rom, void (*irq_cb)(int, int), void (*timer_cb
m_mix_level[7] = 0;
// Register state for saving
//register_save_state();
return 0;
//register_save_state();
return 0;
}
void ymf278b_scan(INT32 nAction, INT32* pnMin)
{
if (nAction & ACB_DRIVER_DATA) {
// internal state
SCAN_VAR(m_pcmregs);
SCAN_VAR(m_slots);
SCAN_VAR(m_wavetblhdr);
SCAN_VAR(m_memmode);
SCAN_VAR(m_memadr);
SCAN_VAR(m_exp);
// internal state - make for happy savestates -dink
SCAN_VAR(m_pcmregs);
SCAN_VAR(m_slots);
SCAN_VAR(m_wavetblhdr);
SCAN_VAR(m_memmode);
SCAN_VAR(m_memadr);
SCAN_VAR(m_exp);
SCAN_VAR(m_fm_l); SCAN_VAR(m_fm_r);
SCAN_VAR(m_pcm_l); SCAN_VAR(m_pcm_r);
SCAN_VAR(m_fm_l); SCAN_VAR(m_fm_r);
SCAN_VAR(m_pcm_l); SCAN_VAR(m_pcm_r);
SCAN_VAR(m_timer_a_count); SCAN_VAR(m_timer_b_count);
SCAN_VAR(m_enable); SCAN_VAR(m_current_irq);
SCAN_VAR(m_irq_line);
SCAN_VAR(m_timer_a_count); SCAN_VAR(m_timer_b_count);
SCAN_VAR(m_enable); SCAN_VAR(m_current_irq);
SCAN_VAR(m_irq_line);
SCAN_VAR(m_port_C); SCAN_VAR(m_port_A); SCAN_VAR(m_port_B);
}
SCAN_VAR(m_port_C); SCAN_VAR(m_port_A); SCAN_VAR(m_port_B);
}
}