// $Id: MSXF4Device.cc 4909 2005-12-03 18:58:10Z arnoldmnl $

#include "MSXF4Device.hh"
#include "XMLElement.hh"

namespace openmsx {

MSXF4Device::MSXF4Device(MSXMotherBoard& motherBoard, const XMLElement& config,
                         const EmuTime& time)
	: MSXDevice(motherBoard, config, time)
{
	inverted = config.getChildDataAsBool("inverted", false);
	reset(time);
}

void MSXF4Device::reset(const EmuTime& /*time*/)
{
	status = inverted ? 0xFF : 0x00;
}

byte MSXF4Device::readIO(word port, const EmuTime& time)
{
	return peekIO(port, time);
}

byte MSXF4Device::peekIO(word /*port*/, const EmuTime& /*time*/) const
{
	return status;
}

void MSXF4Device::writeIO(word /*port*/, byte value, const EmuTime& /*time*/)
{
	if (inverted) {
		status = value | 0x7F;
	} else {
		status = (status & 0x20) | (value & 0xA0);
	}
}

} // namespace openmsx