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RF5C400: State save the external memory registers. Move static variable into device state. Fix the commented out osd_printf_debug. Fix "always values". Added skeleton for reading and writing channel register 0x0F (which is used by the beatmania IIDX games). [smf]

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This commit is contained in:
smf- 2017-12-07 10:54:46 +00:00
parent 90f59a5f33
commit d6601f0483
2 changed files with 51 additions and 19 deletions
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69
src/devices/sound/rf5c400.cpp
View File

@ -155,6 +155,10 @@ void rf5c400_device::device_start()
chan.env_scale = 1.0;
}
save_item(NAME(m_rf5c400_status));
save_item(NAME(m_ext_mem_address));
save_item(NAME(m_ext_mem_data));
for (int i = 0; i < ARRAY_LENGTH(m_channels); i++)
{
save_item(NAME(m_channels[i].startH), i);
@ -314,28 +318,50 @@ void rf5c400_device::rom_bank_updated()
/*****************************************************************************/
static uint16_t rf5c400_status = 0; // a static one of these for all instances of the chip? how does that work?
READ16_MEMBER( rf5c400_device::rf5c400_r )
{
switch(offset)
if (offset < 0x400)
{
case 0x00:
{
return rf5c400_status;
}
//osd_printf_debug("%s:rf5c400_r: %08X, %08X\n", machine().describe_context().c_str(), offset, mem_mask);
case 0x04:
switch(offset)
{
return 0;
}
case 0x00:
{
return m_rf5c400_status;
}
case 0x13: // memory read
{
return read_word(m_ext_mem_address<<1);
case 0x04: // unknown read
{
return 0;
}
case 0x13: // memory read
{
return read_word(m_ext_mem_address<<1);
}
default:
{
//osd_printf_debug("%s:rf5c400_r: %08X, %08X\n", machine().describe_context().c_str(), offset, mem_mask);
return 0;
}
}
}
else
{
//int ch = (offset >> 5) & 0x1f;
int reg = (offset & 0x1f);
return 0;
switch (reg)
{
case 0x0F: // unknown read
return 0;
default:
return 0;
}
}
}
WRITE16_MEMBER( rf5c400_device::rf5c400_w )
@ -346,7 +372,7 @@ WRITE16_MEMBER( rf5c400_device::rf5c400_w )
{
case 0x00:
{
rf5c400_status = data;
m_rf5c400_status = data;
break;
}
@ -432,11 +458,11 @@ WRITE16_MEMBER( rf5c400_device::rf5c400_w )
default:
{
//osd_printf_debug("%s:rf5c400_w: %08X, %08X, %08X\n", machine().describe_context(), data, offset, mem_mask);
//osd_printf_debug("%s:rf5c400_w: %08X, %08X, %08X\n", machine().describe_context().c_str(), data, offset, mem_mask);
break;
}
}
//osd_printf_debug("%s:rf5c400_w: %08X, %08X, %08X at %08X\n", machine().describe_context(), data, offset, mem_mask);
//osd_printf_debug("%s:rf5c400_w: %08X, %08X, %08X\n", machine().describe_context().c_str(), data, offset, mem_mask);
}
else
{
@ -505,12 +531,12 @@ WRITE16_MEMBER( rf5c400_device::rf5c400_w )
}
case 0x0A: // relative to env attack ?
{
// always 0x0100
// always 0x0100/0x140
break;
}
case 0x0B: // relative to env decay ?
{
// always 0x0100
// always 0x0100/0x140/0x180
break;
}
case 0x0C: // env decay
@ -522,7 +548,7 @@ WRITE16_MEMBER( rf5c400_device::rf5c400_w )
}
case 0x0D: // relative to env release ?
{
// always 0x0100
// always 0x0100/0x140
break;
}
case 0x0E: // env release
@ -531,6 +557,11 @@ WRITE16_MEMBER( rf5c400_device::rf5c400_w )
channel->release = data;
break;
}
case 0x0F: // unknown write
{
// always 0x0000
break;
}
case 0x10: // resonance, cutoff freq.
{
// bit 15-12: resonance

1
src/devices/sound/rf5c400.h
View File

@ -98,6 +98,7 @@ private:
rf5c400_channel m_channels[32];
uint16_t m_rf5c400_status;
uint32_t m_ext_mem_address;
uint16_t m_ext_mem_data;
};