mmu.h

#ifndef MMU_H
#define MMU_H

#include "types.h"

/*
 * Memory layout of the GameBoy:
 *  $0000-$3FFF ROM (bank 0)
 *  $4000-$7FFF ROM (bank 1..n, switchable)
 *  $8000-$9FFF VRAM (bank 0 non-CGB, bank 0-1 on CGB)
 *  $A000-$BFFF External RAM (cartridge, optional)
 *  $C000-$CFFF Internal WRAM (bank 0)
 *  $D000-$DFFF Internal WRAM (bank 1-7, switchable, CGB only)
 *  $E000-$FDFF Echo RAM (reserved)
 *  $FE00-$FE9F OAM - Object Attribute Memory
 *  $FEA0-$FEFF Unusable
 *  $FF00-$FF7F Hardware I/O Registers
 *  $FF80-$FFFE Zero
 *  $FFFF       Interrupt Enable Flag
 */

void mmu_step(struct gb_state *s);

u8 mmu_read(struct gb_state *s, u16 location);
void mmu_write(struct gb_state *s, u16 location, u8 value);

u16 mmu_read16(struct gb_state *s, u16 location);
void mmu_write16(struct gb_state *s, u16 location, u16 value);
u16 mmu_pop16(struct gb_state *s);
void mmu_push16(struct gb_state *s, u16 value);


#endif