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alphatro: allow DMA to VRAM (nw)

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This commit is contained in:
arbee 2017-07-19 22:39:21 -04:00
parent 08af3d9f61
commit 94eab0cec6
1 changed files with 22 additions and 2 deletions
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24
src/mame/drivers/alphatro.cpp
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@ -160,8 +160,28 @@ void alphatro_state::update_banking()
}
}
READ8_MEMBER (alphatro_state::ram0000_r) { return m_ram_ptr[offset]; }
WRITE8_MEMBER(alphatro_state::ram0000_w) { m_ram_ptr[offset] = data; }
READ8_MEMBER (alphatro_state::ram0000_r)
{
if (offset < 0xf000)
{
return m_ram_ptr[offset];
}
return m_p_videoram[offset & 0xfff];
}
WRITE8_MEMBER(alphatro_state::ram0000_w)
{
if (offset < 0xf000)
{
m_ram_ptr[offset] = data;
}
else
{
m_p_videoram[offset & 0xfff] = data;
}
}
READ8_MEMBER (alphatro_state::ram6000_r) { return m_ram_ptr[offset+0x6000]; }
WRITE8_MEMBER(alphatro_state::ram6000_w) { m_ram_ptr[offset+0x6000] = data; }
READ8_MEMBER (alphatro_state::rama000_r) { return m_ram_ptr[offset+0xa000]; }