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CLK/Machines/Atari2600/Cartridges/Unpaged.hpp

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//
// CartridgeUnpaged.h
// Clock Signal
//
// Created by Thomas Harte on 17/03/2017.
// Copyright © 2017 Thomas Harte. All rights reserved.
//
#ifndef Atari2600_CartridgeUnpaged_hpp
#define Atari2600_CartridgeUnpaged_hpp
#include "Cartridge.hpp"
namespace Atari2600 {
namespace Cartridge {
class Unpaged: public BusExtender {
public:
Unpaged(uint8_t *rom_base, size_t rom_size) : BusExtender(rom_base, rom_size) {}
void perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
if(isReadOperation(operation) && (address & 0x1000)) {
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*value = rom_base_[address & (rom_size_ - 1)];
}
}
};
}
}
#endif /* Atari2600_CartridgeUnpaged_hpp */