openMSX
RomGeneric8kB.cc
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1 #include "RomGeneric8kB.hh"
2 #include "serialize.hh"
3 #include "xrange.hh"
4 
5 namespace openmsx {
6 
8  : Rom8kBBlocks(config, std::move(rom_))
9 {
10  reset(EmuTime::dummy());
11 }
12 
13 void RomGeneric8kB::reset(EmuTime::param /*time*/)
14 {
15  setUnmapped(0);
16  setUnmapped(1);
17  for (auto i : xrange(2, 6)) {
18  setRom(i, i - 2);
19  }
20  setUnmapped(6);
21  setUnmapped(7);
22 }
23 
24 void RomGeneric8kB::writeMem(word address, byte value, EmuTime::param /*time*/)
25 {
26  setRom(address >> 13, value);
27 }
28 
30 {
31  if ((0x4000 <= address) && (address < 0xC000)) {
32  return nullptr;
33  } else {
34  return unmappedWrite;
35  }
36 }
37 
39 
40 } // namespace openmsx
static byte unmappedWrite[0x10000]
Definition: MSXDevice.hh:302
void setRom(byte region, unsigned block)
Selects a block of the ROM image for reading in a certain region.
Definition: RomBlocks.cc:105
void setUnmapped(byte region)
Select 'unmapped' memory for this region.
Definition: RomBlocks.cc:92
byte * getWriteCacheLine(word address) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for writing.
RomGeneric8kB(const DeviceConfig &config, Rom &&rom)
Definition: RomGeneric8kB.cc:7
void writeMem(word address, byte value, EmuTime::param time) override
Write a given byte to a given location at a certain time to this device.
void reset(EmuTime::param time) override
This method is called on reset.
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
constexpr auto xrange(T e)
Definition: xrange.hh:155