openMSX
MSXRam.hh
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1 #ifndef MSXRAM_HH
2 #define MSXRAM_HH
3 
4 #include "MSXDevice.hh"
5 #include "CheckedRam.hh"
6 #include <optional>
7 
8 namespace openmsx {
9 
10 class MSXRam final : public MSXDevice
11 {
12 public:
13  explicit MSXRam(const DeviceConfig& config);
14 
15  void powerUp(EmuTime::param time) override;
16  [[nodiscard]] byte readMem(word address, EmuTime::param time) override;
17  void writeMem(word address, byte value, EmuTime::param time) override;
18  [[nodiscard]] const byte* getReadCacheLine(word start) const override;
19  [[nodiscard]] byte* getWriteCacheLine(word start) const override;
20  [[nodiscard]] byte peekMem(word address, EmuTime::param time) const override;
21 
22  template<typename Archive>
23  void serialize(Archive& ar, unsigned version);
24 
25 private:
26  void init() override;
27  [[nodiscard]] inline unsigned translate(unsigned address) const;
28 
29 private:
30  /*const*/ unsigned base;
31  /*const*/ unsigned size;
32  /*const*/ std::optional<CheckedRam> checkedRam;
33 };
34 
35 } // namespace openmsx
36 
37 #endif
An MSXDevice is an emulated hardware component connected to the bus of the emulated MSX.
Definition: MSXDevice.hh:33
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: MSXRam.cc:52
const byte * getReadCacheLine(word start) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for reading.
Definition: MSXRam.cc:57
void powerUp(EmuTime::param time) override
This method is called when MSX is powered up.
Definition: MSXRam.cc:30
byte peekMem(word address, EmuTime::param time) const override
Read a byte from a given memory location.
Definition: MSXRam.cc:42
void serialize(Archive &ar, unsigned version)
Definition: MSXRam.cc:68
MSXRam(const DeviceConfig &config)
Definition: MSXRam.cc:8
byte * getWriteCacheLine(word start) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for writing.
Definition: MSXRam.cc:62
byte readMem(word address, EmuTime::param time) override
Read a byte from a location at a certain time from this device.
Definition: MSXRam.cc:47
This file implemented 3 utility functions:
Definition: Autofire.cc:9
uint16_t word
16 bit unsigned integer
Definition: openmsx.hh:29