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small cleanup

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This commit is contained in:
Michaël Banaan Ananas 2014-03-09 16:15:40 +00:00
parent cb7cd21a8c
commit b2a99195ee
2 changed files with 16 additions and 17 deletions
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31
src/emu/sound/ymf278b.c
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@ -479,17 +479,8 @@ void ymf278b_device::retrigger_note(YMF278BSlot *slot)
compute_envelope(slot);
}
void ymf278b_device::C_w(UINT8 reg, UINT8 data, int init)
void ymf278b_device::C_w(UINT8 reg, UINT8 data)
{
if (!init)
{
// PCM regs are only accessible if NEW2 is set
if (~m_exp & 2)
return;
m_stream->update();
}
// Handle slot registers specifically
if (reg >= 0x08 && reg <= 0xf7)
{
@ -526,7 +517,7 @@ void ymf278b_device::C_w(UINT8 reg, UINT8 data, int init)
// copy internal registers data
for (i = 7; i < 12; i++)
C_w(8 + snum + (i-2) * 24, p[i], 1);
C_w(8 + snum + (i-2) * 24, p[i]);
// status register LD bit is on for approx 300us
m_status_ld = 1;
@ -665,11 +656,13 @@ void ymf278b_device::C_w(UINT8 reg, UINT8 data, int init)
break;
case 0x03:
data &= 0x3f; // !
break;
case 0x04:
break;
case 0x05:
// set memory address
m_memadr = (m_pcmregs[3] & 0x3f) << 16 | m_pcmregs[4] << 8 | data;
m_memadr = m_pcmregs[3] << 16 | m_pcmregs[4] << 8 | data;
break;
case 0x06:
@ -731,8 +724,14 @@ WRITE8_MEMBER( ymf278b_device::write )
break;
case 5:
// PCM regs are only accessible if NEW2 is set
if (~m_exp & 2)
break;
m_stream->update();
timer_busy_start(1);
C_w(m_port_C, data, 0);
C_w(m_port_C, data);
break;
default:
@ -813,10 +812,10 @@ void ymf278b_device::device_reset()
A_w(i, 0);
B_w(5, 0);
for (i = 0; i < 8; i++)
C_w(i, 0, 1);
C_w(i, 0);
for (i = 0xff; i >= 8; i--)
C_w(i, 0, 1);
C_w(0xf8, 0x1b, 1);
C_w(i, 0);
C_w(0xf8, 0x1b);
m_port_AB = m_port_C = 0;
m_lastport = 0;

2
src/emu/sound/ymf278b.h
View File

@ -85,7 +85,7 @@ private:
void A_w(UINT8 reg, UINT8 data);
void B_w(UINT8 reg, UINT8 data);
void retrigger_note(YMF278BSlot *slot);
void C_w(UINT8 reg, UINT8 data, int init);
void C_w(UINT8 reg, UINT8 data);
void timer_busy_start(int is_pcm);
void precompute_rate_tables();
void register_save_state();