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(MESS) msx.c: Internal ym2413s don't need the unlock sequence. (nw)

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This commit is contained in:
Wilbert Pol 2014-06-18 21:17:35 +00:00
parent ee2e620553
commit 67f48e5fd7
2 changed files with 1 additions and 26 deletions
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23
src/emu/bus/msx_slot/music.c
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@ -9,8 +9,6 @@ msx_slot_music_device::msx_slot_music_device(const machine_config &mconfig, cons
: msx_slot_rom_device(mconfig, MSX_SLOT_MUSIC, "MSX Internal MSX-MUSIC", tag, owner, clock, "msx_slot_music", __FILE__)
, m_ym2413(NULL)
, m_ym2413_tag(NULL)
, m_opll_active(false)
, m_unlock(0)
{
}
@ -37,33 +35,14 @@ void msx_slot_music_device::device_start()
}
void msx_slot_music_device::device_reset()
{
m_opll_active = false;
}
READ8_MEMBER(msx_slot_music_device::read)
{
return msx_slot_rom_device::read(space, offset);
}
WRITE8_MEMBER(msx_slot_music_device::write)
{
if (m_unlock == 0xbe && data == 0x41)
{
m_opll_active = true;
}
m_unlock = data;
}
WRITE8_MEMBER(msx_slot_music_device::write_ym2413)
{
if (m_opll_active)
{
m_ym2413->write(space, offset & 1, data);
}
m_ym2413->write(space, offset & 1, data);
}

4
src/emu/bus/msx_slot/music.h
View File

@ -24,18 +24,14 @@ public:
static void set_ym2413_tag(device_t &device, const char *tag) { dynamic_cast<msx_slot_music_device &>(device).m_ym2413_tag = tag; }
virtual void device_start();
virtual void device_reset();
virtual DECLARE_READ8_MEMBER(read);
virtual DECLARE_WRITE8_MEMBER(write);
DECLARE_WRITE8_MEMBER(write_ym2413);
private:
ym2413_device *m_ym2413;
const char *m_ym2413_tag;
bool m_opll_active;
UINT8 m_unlock;
};