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i8257: oops (nw)

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cracyc 2014-04-28 13:28:56 +00:00
parent 32528fcf0f
commit c067abea48
1 changed files with 5 additions and 3 deletions
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8
src/emu/machine/i8257.c
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@ -33,7 +33,7 @@ enum
REGISTER_ADDRESS = 0,
REGISTER_WORD_COUNT,
REGISTER_STATUS = 8,
REGISTER_COMMAND = REGISTER_STATUS
REGISTER_MODE = REGISTER_STATUS
};
@ -496,7 +496,7 @@ READ8_MEMBER( i8257n_device::read )
m_msb = !m_msb;
}
else if(offset == 8)
else if(offset == REGISTER_STATUS)
{
data = m_status;
@ -541,9 +541,11 @@ WRITE8_MEMBER( i8257n_device::write )
m_channel[channel].m_count = ((data & 0x3f) << 8) | (m_channel[channel].m_count & 0xff);
m_channel[channel].m_mode = (data >> 6);
if(MODE_AUTOLOAD && (channel == 2))
{
m_channel[3].m_count = ((data & 0x3f) << 8) | (m_channel[3].m_count & 0xff);
m_channel[3].m_mode = (data >> 6);
}
}
else
{
m_channel[channel].m_count = (m_channel[channel].m_count & 0xff00) | data;
@ -555,7 +557,7 @@ WRITE8_MEMBER( i8257n_device::write )
m_msb = !m_msb;
}
else if(offset == 8)
else if(offset == REGISTER_MODE)
{
m_transfer_mode = data;