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CLK/Machines/Atari2600/Cartridges/CartridgeAtari8k.hpp

69 lines
1.6 KiB
C++

//
// CartridgeAtari8k.h
// Clock Signal
//
// Created by Thomas Harte on 18/03/2017.
// Copyright © 2017 Thomas Harte. All rights reserved.
//
#ifndef Atari2600_CartridgeAtari8k_hpp
#define Atari2600_CartridgeAtari8k_hpp
#include "Cartridge.hpp"
namespace Atari2600 {
class CartridgeAtari8k: public Cartridge<CartridgeAtari8k> {
public:
CartridgeAtari8k(const std::vector<uint8_t> &rom) :
Cartridge(rom) {
rom_ptr_ = rom_.data();
}
void perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
address &= 0x1fff;
if(!(address & 0x1000)) return;
if(address == 0x1ff8) rom_ptr_ = rom_.data();
else if(address == 0x1ff9) rom_ptr_ = rom_.data() + 4096;
if(isReadOperation(operation)) {
*value = rom_ptr_[address & 4095];
}
}
private:
uint8_t *rom_ptr_;
};
class CartridgeAtari8kSuperChip: public Cartridge<CartridgeAtari8kSuperChip> {
public:
CartridgeAtari8kSuperChip(const std::vector<uint8_t> &rom) :
Cartridge(rom) {
rom_ptr_ = rom_.data();
}
void perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
address &= 0x1fff;
if(!(address & 0x1000)) return;
if(address == 0x1ff8) rom_ptr_ = rom_.data();
if(address == 0x1ff9) rom_ptr_ = rom_.data() + 4096;
if(isReadOperation(operation)) {
*value = rom_ptr_[address & 4095];
}
if(address < 0x1080) ram_[address & 0x7f] = *value;
else if(address < 0x1100 && isReadOperation(operation)) *value = ram_[address & 0x7f];
}
private:
uint8_t *rom_ptr_;
uint8_t ram_[128];
};
}
#endif /* Atari2600_CartridgeAtari8k_hpp */