mirror of https://github.com/bsnes-emu/bsnes.git
70 lines
1.8 KiB
C++
Executable File
70 lines
1.8 KiB
C++
Executable File
//Memory
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unsigned Memory::size() const { return 0; }
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//StaticRAM
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uint8* StaticRAM::data() { return data_; }
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unsigned StaticRAM::size() const { return size_; }
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uint8 StaticRAM::read(unsigned addr) { return data_[addr]; }
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void StaticRAM::write(unsigned addr, uint8 n) { data_[addr] = n; }
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uint8& StaticRAM::operator[](unsigned addr) { return data_[addr]; }
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const uint8& StaticRAM::operator[](unsigned addr) const { return data_[addr]; }
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StaticRAM::StaticRAM(unsigned n) : size_(n) { data_ = new uint8[size_]; }
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StaticRAM::~StaticRAM() { delete[] data_; }
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//MappedRAM
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void MappedRAM::reset() {
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if(data_) {
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delete[] data_;
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data_ = 0;
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}
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size_ = -1U;
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write_protect_ = false;
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}
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void MappedRAM::map(uint8 *source, unsigned length) {
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reset();
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data_ = source;
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size_ = data_ && length > 0 ? length : -1U;
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}
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void MappedRAM::copy(const uint8 *data, unsigned size) {
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if(!data_) {
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size_ = (size & ~255) + ((bool)(size & 255) << 8);
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data_ = new uint8[size_]();
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}
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memcpy(data_, data, min(size_, size));
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}
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void MappedRAM::write_protect(bool status) { write_protect_ = status; }
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uint8* MappedRAM::data() { return data_; }
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unsigned MappedRAM::size() const { return size_; }
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uint8 MappedRAM::read(unsigned addr) { return data_[addr]; }
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void MappedRAM::write(unsigned addr, uint8 n) { if(!write_protect_) data_[addr] = n; }
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const uint8& MappedRAM::operator[](unsigned addr) const { return data_[addr]; }
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MappedRAM::MappedRAM() : data_(0), size_(-1U), write_protect_(false) {}
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//Bus
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uint8 Bus::read(unsigned addr) {
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#if defined(CHEAT_SYSTEM)
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if(cheat.active() && cheat.exists(addr)) {
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uint8 r;
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if(cheat.read(addr, r)) return r;
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}
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#endif
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Page &p = page[addr >> 8];
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return p.access->read(p.offset + addr);
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}
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void Bus::write(unsigned addr, uint8 data) {
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Page &p = page[addr >> 8];
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return p.access->write(p.offset + addr, data);
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}
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