NINTV-DS/arm9/source/emucore/GRAM.h

#ifndef GRAM_H
#define GRAM_H

#include "RAM.h"

#define GRAM_SIZE       0x0200

extern UINT8     gram_image[GRAM_SIZE];
extern UINT8     dirtyCards[GRAM_SIZE>>3];
extern UINT8     dirtyRAM;

class GRAM : public RAM
{
    friend class AY38900;

    public:
        GRAM();

        void reset();
        inline UINT16 peek(UINT16 location) {return gram_image[location & 0x01FF];}
        void poke(UINT16 location, UINT16 value);

        void markClean();
        BOOL isDirty();
        BOOL isCardDirty(UINT16 cardLocation);

        inline size_t getImageByteSize() {
            return size * sizeof(UINT16);
        }
        void getImage(void* dst, UINT16 offset, UINT16 size) {
            memcpy(dst, gram_image + offset, size);
        }
        void setImage(void* src, UINT16 offset, UINT16 size) {
            memcpy(gram_image + offset, src, size);
        }

        RAMState getState(UINT16* image);
        void setState(RAMState state, UINT16* image);

    private:
};

#endif