private void PPI1PortBChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi1.IsPortBOutput)
{
m_eprom_address = (ushort)(m_eprom_address & 0xff00 | args.NewValue);
}
}
private void PPI1PortAChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi1.IsPortAOutput)
{
m_eprom_data = args.NewValue;
}
}
private void PPI2PortAChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi2.IsPortAOutput)
{
m_channel_divisor[3] = args.NewValue;
AdvanceAudio();
}
}
private void PPI1PortCChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi1.IsPortCLoOutput && m_ppi1.IsPortCHiOutput)
{
m_channel_divisor[2] = args.NewValue;
AdvanceAudio();
}
}
private void PPI2PortBChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi2.IsPortBOutput)
{
m_channel_volume[0] = m_dac_values[args.NewValue & 0x0f];
m_channel_volume[1] = m_dac_values[(args.NewValue >> 4) & 0x0f];
AdvanceAudio();
}
}
private void PPI1PortCChanged(object sender, I8255.PortChangedEventArgs args)
{
if (m_ppi1.IsPortCLoOutput)
{
m_eprom_address = (ushort)(m_eprom_address & 0xf0ff | ((args.NewValue << 8) & 0x0f));
}
if (m_ppi1.IsPortCHiOutput)
{
m_eprom_address = (ushort)(m_eprom_address & 0x0fff | ((args.NewValue << 8) & 0xf0));
}
}
