openMSX
RomArc.cc
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1// Parallax' Arc
2
3#include "RomArc.hh"
4#include "MSXCPUInterface.hh"
5#include "serialize.hh"
6
7namespace openmsx {
8
9RomArc::RomArc(const DeviceConfig& config, Rom&& rom_)
10 : Rom16kBBlocks(config, std::move(rom_))
11{
12 setUnmapped(0);
13 setRom(1, 0);
14 setRom(2, 1);
15 setUnmapped(3);
16
17 reset(EmuTime::dummy());
18
19 getCPUInterface().register_IO_Out(0x7f, this);
20 getCPUInterface().register_IO_In (0x7f, this);
21}
22
24{
26 getCPUInterface().unregister_IO_In (0x7f, this);
27}
28
29void RomArc::reset(EmuTime::param /*time*/)
30{
31 offset = 0x00;
32}
33
34void RomArc::writeIO(word /*port*/, byte value, EmuTime::param /*time*/)
35{
36 if (value == 0x35) {
37 ++offset;
38 }
39}
40
41byte RomArc::readIO(word port, EmuTime::param time)
42{
43 return RomArc::peekIO(port, time);
44}
45
46byte RomArc::peekIO(word /*port*/, EmuTime::param /*time*/) const
47{
48 return ((offset & 0x03) == 0x03) ? 0xda : 0xff;
49}
50
51template<typename Archive>
52void RomArc::serialize(Archive& ar, unsigned /*version*/)
53{
54 ar.template serializeBase<Rom16kBBlocks>(*this);
55 ar.serialize("offset", offset);
56}
59
60} // namespace openmsx
void register_IO_Out(byte port, MSXDevice *device)
Devices can register their Out ports.
void register_IO_In(byte port, MSXDevice *device)
Devices can register their In ports.
void unregister_IO_In(byte port, MSXDevice *device)
void unregister_IO_Out(byte port, MSXDevice *device)
MSXCPUInterface & getCPUInterface() const
Definition: MSXDevice.cc:133
RomArc(const DeviceConfig &config, Rom &&rom)
Definition: RomArc.cc:9
void serialize(Archive &ar, unsigned version)
Definition: RomArc.cc:52
byte readIO(word port, EmuTime::param time) override
Read a byte from an IO port at a certain time from this device.
Definition: RomArc.cc:41
byte peekIO(word port, EmuTime::param time) const override
Read a byte from a given IO port.
Definition: RomArc.cc:46
~RomArc() override
Definition: RomArc.cc:23
void reset(EmuTime::param time) override
This method is called on reset.
Definition: RomArc.cc:29
void writeIO(word port, byte value, EmuTime::param time) override
Write a byte to a given IO port at a certain time to this device.
Definition: RomArc.cc:34
void setRom(byte region, unsigned block)
Selects a block of the ROM image for reading in a certain region.
Definition: RomBlocks.cc:103
void setUnmapped(byte region)
Select 'unmapped' memory for this region.
Definition: RomBlocks.cc:91
This file implemented 3 utility functions:
Definition: Autofire.cc:9
REGISTER_MSXDEVICE(ChakkariCopy, "ChakkariCopy")
uint16_t word
16 bit unsigned integer
Definition: openmsx.hh:29
STL namespace.
#define INSTANTIATE_SERIALIZE_METHODS(CLASS)
Definition: serialize.hh:1021