OXYGENHUB
◆ main openmsx / src / MSXRTC.cc
1.4 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
1 
#include "MSXRTC.hh"
2
3 
#include "serialize.hh"
4
5 
#include "unreachable.hh"
6
7 
namespace openmsx {
8
9 
MSXRTC::MSXRTC(const DeviceConfig& config)
10 
	: MSXDevice(config)
11 
	, sram(getName() + " SRAM", 4 * 13, config)
12 
	, rp5c01(getCommandController(), sram, getCurrentTime(), getName())
13 
{
14 
	reset(getCurrentTime());
15 
}
16
17 
void MSXRTC::reset(EmuTime time)
18 
{
19 
	// TODO verify on real hardware .. how?
20 
	//  - registerLatch set to zero or some other value?
21 
	//  - only on power-up or also on reset?
22 
	registerLatch = 0;
23 
	rp5c01.reset(time);
24 
}
25
26 
uint8_t MSXRTC::readIO(uint16_t port, EmuTime time)
27 
{
28 
	return port & 0x01 ? rp5c01.readPort(registerLatch, time) | 0xF0 : 0xFF;
29 
}
30
31 
uint8_t MSXRTC::peekIO(uint16_t port, EmuTime /*time*/) const
32 
{
33 
	return port & 0x01 ? rp5c01.peekPort(registerLatch) | 0xF0 : 0xFF;
34 
}
35
36 
void MSXRTC::writeIO(uint16_t port, uint8_t value, EmuTime time)
37 
{
38 
	switch (port & 0x01) {
39 
	case 0:
40 
		registerLatch = value & 0x0F;
41 
		break;
42 
	case 1:
43 
		rp5c01.writePort(registerLatch, value & 0x0F, time);
44 
		break;
45 
	default:
46 
		UNREACHABLE;
47 
	}
48 
}
49
50 
template<typename Archive>
51 
void MSXRTC::serialize(Archive& ar, unsigned /*version*/)
52 
{
53 
	ar.template serializeBase<MSXDevice>(*this);
54 
	ar.serialize("sram",          sram,
55 
	             "rp5c01",        rp5c01,
56 
	             "registerLatch", registerLatch);
57 
}
58 
INSTANTIATE_SERIALIZE_METHODS(MSXRTC);
59 
REGISTER_MSXDEVICE(MSXRTC, "RTC");
60
61 
} // namespace openmsx