openMSX
MegaSCSI.hh
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1#ifndef MEGASCSI_HH
2#define MEGASCSI_HH
3
4#include "MSXDevice.hh"
5#include "MB89352.hh"
6#include "SRAM.hh"
8
9namespace openmsx {
10
11class MegaSCSI final : public MSXDevice
12{
13public:
14 explicit MegaSCSI(const DeviceConfig& config);
15
16 void reset(EmuTime::param time) override;
17
18 [[nodiscard]] byte readMem(word address, EmuTime::param time) override;
19 [[nodiscard]]byte peekMem(word address, EmuTime::param time) const override;
20 void writeMem(word address, byte value, EmuTime::param time) override;
21 [[nodiscard]]const byte* getReadCacheLine(word address) const override;
22 [[nodiscard]]byte* getWriteCacheLine(word address) const override;
23
24 template<typename Archive>
25 void serialize(Archive& ar, unsigned version);
26
27private:
28 [[nodiscard]]unsigned getSramSize() const;
29 void setSRAM(unsigned region, byte block);
30
31private:
32 MB89352 mb89352;
33 SRAM sram;
34 RomBlockDebuggable romBlockDebug;
35
36 bool isWriteable[4]; // which region is readonly?
37 byte mapped[4]; // SPC block mapped in this region?
38 const byte blockMask;
39};
40
41} // namespace openmsx
42
43#endif
An MSXDevice is an emulated hardware component connected to the bus of the emulated MSX.
Definition: MSXDevice.hh:33
void serialize(Archive &ar, unsigned version)
Definition: MegaSCSI.cc:177
byte * getWriteCacheLine(word address) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for writing.
Definition: MegaSCSI.cc:153
byte readMem(word address, EmuTime::param time) override
Read a byte from a location at a certain time from this device.
Definition: MegaSCSI.cc:83
byte peekMem(word address, EmuTime::param time) const override
Read a byte from a given memory location.
Definition: MegaSCSI.cc:104
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: MegaSCSI.cc:133
MegaSCSI(const DeviceConfig &config)
Definition: MegaSCSI.cc:66
void reset(EmuTime::param time) override
This method is called on reset.
Definition: MegaSCSI.cc:75
const byte * getReadCacheLine(word address) const override
Test that the memory in the interval [start, start + CacheLine::SIZE) is cacheable for reading.
Definition: MegaSCSI.cc:118
This file implemented 3 utility functions:
Definition: Autofire.cc:9
uint16_t word
16 bit unsigned integer
Definition: openmsx.hh:29