Mapper_000.cpp

#include "Mapper_000.h"

Mapper_000::Mapper_000(uint8_t prgBanks, uint8_t chrBanks) : Mapper::Mapper(prgBanks, chrBanks)
{

}

Mapper_000::~Mapper_000()
{
}

bool Mapper_000::cpuMapRead(uint16_t addr, uint32_t &mapped_addr)
{
    if(addr >= 0x8000 && addr <= 0xFFFF)
    {
        mapped_addr = addr & (nPRGBanks > 1 ? 0x7FFF : 0x3FFF);
        return true;
    }
    else
        return false;
}

bool Mapper_000::cpuMapWrite(uint16_t addr, uint32_t &mapped_addr, uint8_t data)
{
    if(addr >= 0x8000 && addr <= 0xFFFF)
    {
        mapped_addr = addr & (nPRGBanks > 1 ? 0x7FFF : 0x3FFF);
        return true;
    }
    else
        return false;
}

bool Mapper_000::ppuMapRead(uint16_t addr, uint32_t &mapped_addr)
{
    if(addr >= 0x0000 && addr <= 0x1FFF)
    {
        mapped_addr = addr;
        return true;
    }
    else
        return false;
}

bool Mapper_000::ppuMapWrite(uint16_t addr, uint32_t &mapped_addr)
{
    if(addr >= 0x0000 && addr <= 0x1FFF)
    {
        if(nCHRBanks == 0)
        {
            //treat as RAM
            mapped_addr = addr;
            return true;
        }
    }
    
        return false;
}