UINT8 snes_bcbattle_device::read_pin4()
{
UINT8 ret = 0;
if (m_idx >= 80)
ret |= 0x00;
else if (m_idx >= 28) // scan actual barcode
{
ret |= read_current_bit(); // if no code is pending transmission, the function returns 0
m_idx++;
}
else if (m_idx >= 25) // unknown flags?
m_idx++;
else if (m_idx == 24) // barcode present
{
ret |= m_pending_code;
m_idx++;
}
else if (m_idx >= 12) // controller ID
ret |= BIT(0x7000, m_idx++);
else // first 12 bytes are unknown and probably always 0
m_idx++;
return ret;
}
uint8_t nes_bcbattle_device::read_exp(offs_t offset)
{
uint8_t ret = 0;
if (offset == 1) //$4017
{
ret |= read_current_bit() << 2;
}
return ret;
}
