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◆ main openmsx / src / cpu / MSXMultiIODevice.cc
1.7 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "MSXMultiIODevice.hh"
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#include "MSXException.hh"
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#include "TclObject.hh"
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#include "stl.hh"
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#include <cassert>
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namespace openmsx {
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MSXMultiIODevice::MSXMultiIODevice(HardwareConfig& hwConf)
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	: MSXMultiDevice(hwConf)
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{
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}
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MSXMultiIODevice::~MSXMultiIODevice()
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{
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	assert(devices.empty());
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}
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void MSXMultiIODevice::addDevice(MSXDevice* device)
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{
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	if (contains(devices, device)) {
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		throw MSXException(
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			"Overlapping IO-port ranges for \"",
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			device->getName(), "\".");
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	}
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	devices.push_back(device);
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}
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void MSXMultiIODevice::removeDevice(MSXDevice* device)
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{
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	devices.erase(rfind_unguarded(devices, device));
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}
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const std::string& MSXMultiIODevice::getName() const
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{
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	TclObject list;
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	getNameList(list);
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	deviceName = list.getString();
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	return deviceName;
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}
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void MSXMultiIODevice::getNameList(TclObject& result) const
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{
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	for (const auto* dev : devices) {
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		const auto& name = dev->getName();
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		if (!name.empty()) {
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			result.addListElement(name);
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		}
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	}
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}
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uint8_t MSXMultiIODevice::readIO(uint16_t port, EmuTime time)
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{
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	// conflict: In practice, pull down seems to win over pull up,
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	//           so a logical AND over the read values most accurately
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	//           resembles what real hardware does.
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	uint8_t result = 0xFF;
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	for (auto& dev : devices) {
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		result &= dev->readIO(port, time);
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	}
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	return result;
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}
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uint8_t MSXMultiIODevice::peekIO(uint16_t port, EmuTime time) const
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{
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	// conflict: Handle this in the same way as readIO.
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	uint8_t result = 0xFF;
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	for (const auto& dev : devices) {
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		result &= dev->peekIO(port, time);
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	}
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	return result;
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}
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void MSXMultiIODevice::writeIO(uint16_t port, uint8_t value, EmuTime time)
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{
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	for (auto& dev : devices) {
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		dev->writeIO(port, value, time);
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	}
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}
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} // namespace openmsx