#include "nes_mapper.h"

 

// Mapper 79
void MAP79_Reset()
{
  // set CPU bank pointers
//  set_CPU_banks(0,1,2,3);

  // set PPU bank pointers
  if(num_1k_VROM_banks)
  {
    set_PPU_banks(0,1,2,3,4,5,6,7);
  }
}

void MAP79_MemoryWriteLow(uint16 addr, uint8 data)
{
  if(addr & 0x0100)
  {
    uint8 prg_bank = (data & 0x08) >> 3;
    uint8 chr_bank = data & 0x07;

    set_CPU_bank4(prg_bank*4+0);
    set_CPU_bank5(prg_bank*4+1);
    set_CPU_bank6(prg_bank*4+2);
    set_CPU_bank7(prg_bank*4+3);

    set_PPU_bank0(chr_bank*8+0);
    set_PPU_bank1(chr_bank*8+1);
    set_PPU_bank2(chr_bank*8+2);
    set_PPU_bank3(chr_bank*8+3);
    set_PPU_bank4(chr_bank*8+4);
    set_PPU_bank5(chr_bank*8+5);
    set_PPU_bank6(chr_bank*8+6);
    set_PPU_bank7(chr_bank*8+7);
  }
}
void MAP79_Init()
{
	NES_Mapper->Reset = MAP79_Reset;
	NES_Mapper->WriteLow=MAP79_MemoryWriteLow;
}