49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
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#pragma once
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/**
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* The memory of the Bytepusher. 16 MiB (0x1000008 bytes).
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* The memory map is located at the beginning of memory and
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* looks like this:
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*
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* memory (byte) | description
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* --------------|----------------
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* 0, 1 | Keyboard state, if key X is
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* | pressed then bit X is on
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* |
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* 2, 3, 4 | The program counter starts here
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* |
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* 5 | Graphics block location. A value
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* | of ZZ means color of pixel at coordinate (XX, YY)
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* | is at ZZYYXX
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* |
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* 6, 7 | Sound block location. A value of XXYY
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* | means audio sample ZZ is at address XXYY
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* -------------------------------
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* The byte ordering used by Bytepusher is big-endian.
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*/
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#include <stdlib.h>
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#include <string>
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class Bus;
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class Memory {
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public:
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Memory(Bus* bus);
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~Memory();
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static const size_t MEMORY_SIZE = 0x1000008;
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uint8_t mem[MEMORY_SIZE];
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bool ROMLoaded;
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std::string ROMFilepath;
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size_t ROMSize;
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std::string ROMLoadError;
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std::string snapshotError;
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std::string snapshotLast;
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void Reset();
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bool LoadROM(std::string filepath);
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bool SnapshotRAM(std::string filepath);
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private:
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Bus* bus;
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};
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