Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-24 06:30:04 +03:00
Code Issues Actions 7 Packages Projects Releases Wiki Activity

moved BUSY timer adjustment to ymf278b_w

Browse Source
This commit is contained in:
Michaël Banaan Ananas 2011-08-07 00:50:13 +00:00
parent fbc5e6b21e
commit c4130de58a
1 changed files with 56 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

101
src/emu/sound/ymf278b.c
View File

@ -466,12 +466,6 @@ static void ymf278b_B_w(YMF278BChip *chip, UINT8 reg, UINT8 data)
}
}
static TIMER_CALLBACK( ymf278b_timer_busy_clear )
{
YMF278BChip *chip = (YMF278BChip *)ptr;
chip->busy = 0;
}
static TIMER_CALLBACK( ymf278b_timer_ld_clear )
{
YMF278BChip *chip = (YMF278BChip *)ptr;
@ -480,10 +474,6 @@ static TIMER_CALLBACK( ymf278b_timer_ld_clear )
static void ymf278b_C_w(YMF278BChip *chip, UINT8 reg, UINT8 data)
{
// status register BUSY bit is on for 88 cycles (56 for fm)
chip->busy = 1;
chip->timer_busy->adjust(attotime::from_hz(chip->clock / 88));
chip->stream->update();
chip->pcmregs[reg] = data;
@ -671,6 +661,62 @@ static void ymf278b_C_w(YMF278BChip *chip, UINT8 reg, UINT8 data)
}
}
static TIMER_CALLBACK( ymf278b_timer_busy_clear )
{
YMF278BChip *chip = (YMF278BChip *)ptr;
chip->busy = 0;
}
static void ymf278b_timer_busy_reset(YMF278BChip *chip, int is_pcm)
{
// status register BUSY bit is on for 56(FM) or 88(PCM) cycles
chip->busy = 1;
chip->timer_busy->adjust(attotime::from_hz(chip->clock / (is_pcm ? 88 : 56)));
}
WRITE8_DEVICE_HANDLER( ymf278b_w )
{
YMF278BChip *chip = get_safe_token(device);
switch (offset)
{
case 0:
ymf278b_timer_busy_reset(chip, 0);
chip->port_A = data;
break;
case 1:
ymf278b_timer_busy_reset(chip, 0);
ymf278b_A_w(device->machine(), chip, chip->port_A, data);
break;
case 2:
ymf278b_timer_busy_reset(chip, 0);
chip->port_B = data;
break;
case 3:
ymf278b_timer_busy_reset(chip, 0);
ymf278b_B_w(chip, chip->port_B, data);
break;
case 4:
ymf278b_timer_busy_reset(chip, 1);
chip->port_C = data;
break;
case 5:
ymf278b_timer_busy_reset(chip, 1);
ymf278b_C_w(chip, chip->port_C, data);
break;
default:
logerror("%s: unexpected write at offset %X to ymf278b = %02X\n", device->machine().describe_context(), offset, data);
break;
}
}
READ8_DEVICE_HANDLER( ymf278b_r )
{
YMF278BChip *chip = get_safe_token(device);
@ -713,41 +759,6 @@ READ8_DEVICE_HANDLER( ymf278b_r )
return 0xff;
}
WRITE8_DEVICE_HANDLER( ymf278b_w )
{
YMF278BChip *chip = get_safe_token(device);
switch (offset)
{
case 0:
chip->port_A = data;
break;
case 1:
ymf278b_A_w(device->machine(), chip, chip->port_A, data);
break;
case 2:
chip->port_B = data;
break;
case 3:
ymf278b_B_w(chip, chip->port_B, data);
break;
case 4:
chip->port_C = data;
break;
case 5:
ymf278b_C_w(chip, chip->port_C, data);
break;
default:
logerror("%s: unexpected write at offset %X to ymf278b = %02X\n", device->machine().describe_context(), offset, data);
break;
}
}
static void ymf278b_init(device_t *device, YMF278BChip *chip, void (*cb)(device_t *, int))
{