openMSX
RomHolyQuran.cc
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1 // Holy Qu'ran cartridge
2 // It is like an ASCII 8KB, but using the 5000h, 5400h, 5800h and 5C00h
3 // addresses.
4 
5 #include "RomHolyQuran.hh"
6 #include "serialize.hh"
7 #include "xrange.hh"
8 
9 namespace openmsx {
10 
12  : Rom8kBBlocks(config, std::move(rom_))
13 {
14  reset(EmuTime::dummy());
15 }
16 
17 void RomHolyQuran::reset(EmuTime::param /*time*/)
18 {
19  setUnmapped(0);
20  setUnmapped(1);
21  for (auto i : xrange(2, 6)) {
22  setRom(i, 0);
23  }
24  setUnmapped(6);
25  setUnmapped(7);
26 }
27 
28 void RomHolyQuran::writeMem(word address, byte value, EmuTime::param /*time*/)
29 {
30  // TODO are switch addresses mirrored?
31  if ((0x5000 <= address) && (address < 0x6000)) {
32  byte region = ((address >> 10) & 3) + 2;
33  setRom(region, value);
34  }
35 }
36 
38 {
39  if ((0x5000 <= address) && (address < 0x6000)) {
40  return nullptr;
41  } else {
42  return unmappedWrite;
43  }
44 }
45 
47 
48 } // 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
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.
Definition: RomHolyQuran.cc:28
RomHolyQuran(const DeviceConfig &config, Rom &&rom)
Definition: RomHolyQuran.cc:11
void reset(EmuTime::param time) override
This method is called on reset.
Definition: RomHolyQuran.cc:17
byte * getWriteCacheLine(word address) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for writing.
Definition: RomHolyQuran.cc:37
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