OXYGENHUB
◆ main openmsx / src / MSXPrinterPort.cc
3.5 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
1 
#include "MSXPrinterPort.hh"
2
3 
#include "DummyPrinterPortDevice.hh"
4 
#include "serialize.hh"
5
6 
#include "checked_cast.hh"
7 
#include "narrow.hh"
8 
#include "outer.hh"
9 
#include "unreachable.hh"
10
11 
#include <cstdint>
12 
#include <memory>
13
14 
namespace openmsx {
15
16 
MSXPrinterPort::MSXPrinterPort(const DeviceConfig& config)
17 
	: MSXDevice(config)
18 
	, Connector(MSXDevice::getPluggingController(), "printerport",
19 
	            std::make_unique<DummyPrinterPortDevice>())
20 
	, debuggable(getMotherBoard(), MSXDevice::getName())
21 
        , writePortMask(config.getChildDataAsBool("bidirectional", false) ? 0x03 : 0x01)
22 
        , readPortMask(config.getChildDataAsBool("status_readable_on_all_ports", false) ? 0 : writePortMask)
23 
	, unusedBits(uint8_t(config.getChildDataAsInt("unused_bits", 0xFF))) // TODO: some machines use the port number as unused bits (e.g. lintweaker's Sanyo PHC-23)
24 
{
25 
	reset(getCurrentTime());
26 
}
27
28 
void MSXPrinterPort::reset(EmuTime time)
29 
{
30 
	writeData(0, time);    // TODO check this
31 
	setStrobe(true, time); // TODO check this
32 
}
33
34 
uint8_t MSXPrinterPort::readIO(uint16_t port, EmuTime time)
35 
{
36 
	return peekIO(port, time);
37 
}
38
39 
uint8_t MSXPrinterPort::peekIO(uint16_t port, EmuTime time) const
40 
{
41 
	bool showStatus = (port & readPortMask) == 0;
42 
	if (!showStatus) return 0xFF;
43 
	// bit 1 = status / other bits depend on something unknown, specified
44 
	// in the XML file
45 
	return getPluggedPrintDev().getStatus(time)
46 
		       ? (unusedBits | 0b10) : (unusedBits & ~0b10);
47 
}
48
49 
void MSXPrinterPort::writeIO(uint16_t port, uint8_t value, EmuTime time)
50 
{
51 
	switch (port & writePortMask) {
52 
	case 0:
53 
		setStrobe(value & 1, time); // bit 0 = strobe
54 
		break;
55 
	case 1:
56 
		writeData(value, time);
57 
		break;
58 
	case 2: // nothing here
59 
		break;
60 
	case 3: // 0x93 PDIR (BiDi) is not implemented.
61 
		break;
62 
	default:
63 
		UNREACHABLE;
64 
	}
65 
}
66
67 
void MSXPrinterPort::setStrobe(bool newStrobe, EmuTime time)
68 
{
69 
	if (newStrobe != strobe) {
70 
		strobe = newStrobe;
71 
		getPluggedPrintDev().setStrobe(strobe, time);
72 
	}
73 
}
74 
void MSXPrinterPort::writeData(uint8_t newData, EmuTime time)
75 
{
76 
	if (newData != data) {
77 
		data = newData;
78 
		getPluggedPrintDev().writeData(data, time);
79 
	}
80 
}
81
82 
zstring_view MSXPrinterPort::getDescription() const
83 
{
84 
	return "MSX Printer port";
85 
}
86
87 
zstring_view MSXPrinterPort::getClass() const
88 
{
89 
	return "Printer Port";
90 
}
91
92 
void MSXPrinterPort::plug(Pluggable& dev, EmuTime time)
93 
{
94 
	Connector::plug(dev, time);
95 
	getPluggedPrintDev().writeData(data, time);
96 
	getPluggedPrintDev().setStrobe(strobe, time);
97 
}
98
99 
PrinterPortDevice& MSXPrinterPort::getPluggedPrintDev() const
100 
{
101 
	return *checked_cast<PrinterPortDevice*>(&getPlugged());
102 
}
103
104
105 
MSXPrinterPort::Debuggable::Debuggable(MSXMotherBoard& motherBoard_, const std::string& name_)
106 
	: SimpleDebuggable(motherBoard_, name_, "Printer Port", 2)
107 
{
108 
}
109
110 
uint8_t MSXPrinterPort::Debuggable::read(unsigned address)
111 
{
112 
	const auto& pPort = OUTER(MSXPrinterPort, debuggable);
113 
	return (address == 0) ? pPort.strobe : pPort.data;
114 
}
115
116 
void MSXPrinterPort::Debuggable::write(unsigned address, uint8_t value)
117 
{
118 
	auto& pPort = OUTER(MSXPrinterPort, debuggable);
119 
	pPort.writeIO(narrow<uint16_t>(address), value, pPort.getCurrentTime());
120 
}
121
122
123 
template<typename Archive>
124 
void MSXPrinterPort::serialize(Archive& ar, unsigned /*version*/)
125 
{
126 
	ar.template serializeBase<MSXDevice>(*this);
127 
	ar.template serializeBase<Connector>(*this);
128 
	ar.serialize("strobe", strobe,
129 
	             "data",   data);
130 
	// TODO force writing data to port??
131 
}
132 
INSTANTIATE_SERIALIZE_METHODS(MSXPrinterPort);
133 
REGISTER_MSXDEVICE(MSXPrinterPort, "PrinterPort");
134
135 
} // namespace openmsx