64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
//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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/*if(name_) interface()->freeSharedMemory(data_);
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else free(data_);
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data_ = 0;*/
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abort();
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}
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size_ = 0;
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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;
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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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if(name_) data_ = (uint8*)interface()->allocSharedMemory(name_, size_);
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else 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(const char* name) : data_(0), size_(0), write_protect_(false), name_(name) {}
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//Bus
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uint8 Bus::read(unsigned addr) {
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return reader[lookup[addr]](target[addr]);
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}
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void Bus::write(unsigned addr, uint8 data) {
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return writer[lookup[addr]](target[addr], data);
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}
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