//////////////////////////////////////////////////////////////////////////////////
// 本程序移植自网友ye781205的NES模拟器工程
// ALIENTEK STM32F407开发板
// NES MAP 驱动代码
// 正点原子@ALIENTEK
// 技术论坛:www.openedv.com
// 创建日期:2014/7/1
// 版本：V1.0
//////////////////////////////////////////////////////////////////////////////////

#ifndef __NES_MAPPER_H
#define __NES_MAPPER_H

#include "stdint.h"

#define num_8k_ROM_banks VROM_8K_SIZE
#define num_1k_VROM_banks VROM_1K_SIZE

typedef struct {
  void (*Reset)();
  void (*Write)(uint16_t addr, uint8_t data);
  void (*Read)(uint8_t data, uint16_t addr);
  uint8_t (*ReadLow)(uint16_t addr);
  void (*WriteLow)(uint16_t addr, uint8_t data);
  void (*HSync)(int scanline);
  void (*VSync)(void);
} MAPPER;

typedef enum { MMC1_SMALL, MMC1_512K, MMC1_1024K } MMC1_Size_t;

typedef struct {
  uint32_t write_count;
  uint8_t bits;
  uint8_t regs[4];
  uint32_t last_write_addr;

  MMC1_Size_t MMC1_Size;
  uint32_t MMC1_256K_base;
  uint32_t MMC1_swap;

  // these are the 4 ROM banks currently selected
  uint32_t MMC1_bank1;
  uint32_t MMC1_bank2;
  uint32_t MMC1_bank3;
  uint32_t MMC1_bank4;

  uint32_t MMC1_HI1;
  uint32_t MMC1_HI2;
} Mapper1Res;

// 通用map变量结构体
typedef struct {
  uint8_t patch;
  uint8_t regs[11];

  uint32_t prg0, prg1;
  uint32_t chr01, chr23, chr4, chr5, chr6, chr7;

  uint8_t irq_enabled;  // IRQs enabled
  uint32_t irq_counter; // IRQ scanline counter, decreasing
  uint32_t irq_latch;   // IRQ scanline counter latch
} MapperCommRes;

extern uint32_t ROM_mask;
extern uint32_t VROM_mask;
extern const int MapTab[];
extern MAPPER *NES_Mapper;
extern uint32_t VROM_mask;

extern Mapper1Res *MAP1;
extern MapperCommRes *MAPx;

//////////////////////////////////////////////////////////////////////////////////
void Mapper_Init(void);
void asm_Mapper_Write(uint8_t byData, uint16_t wAddr);
void asm_Mapper_ReadLow(uint16_t wAddr);
void asm_Mapper_WriteLow(uint8_t byData, uint16_t wAddr);

void map67_(signed char page); // 6502.s
void map89_(signed char page);
void mapAB_(signed char page);
void mapCD_(signed char page);
void mapEF_(signed char page); // 有符号字符

void set_CPU_bank3(signed char page);
void set_CPU_bank4(signed char page);
void set_CPU_bank5(signed char page);
void set_CPU_bank6(signed char page);
void set_CPU_bank7(signed char page);
void set_CPU_banks(int bank0_num, int bank1_num, int bank2_num, int bank3_num);

void set_PPU_banks(uint32_t bank0_num, uint32_t bank1_num, uint32_t bank2_num,
                   uint32_t bank3_num, uint32_t bank4_num, uint32_t bank5_num,
                   uint32_t bank6_num, uint32_t bank7_num);
void set_PPU_bank0(uint32_t bank_num);
void set_PPU_bank1(uint32_t bank_num);
void set_PPU_bank2(uint32_t bank_num);
void set_PPU_bank3(uint32_t bank_num);
void set_PPU_bank4(uint32_t bank_num);
void set_PPU_bank5(uint32_t bank_num);
void set_PPU_bank6(uint32_t bank_num);
void set_PPU_bank7(uint32_t bank_num);
void set_PPU_bank8(uint32_t bank_num);
void set_PPU_bank9(uint32_t bank_num);
void set_PPU_bank10(uint32_t bank_num);
void set_PPU_bank11(uint32_t bank_num);
void set_VRAM_bank(uint8_t bank, uint32_t bank_num);

#endif