mirror of
https://github.com/TomHarte/CLK.git
synced 2024-07-17 13:29:02 +00:00
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
|
//
|
||
|
|
// CartridgeParkerBros.h
|
||
|
|
// Clock Signal
|
||
|
|
//
|
||
|
|
// Created by Thomas Harte on 18/03/2017.
|
||
|
|
// Copyright © 2017 Thomas Harte. All rights reserved.
|
||
|
|
//
|
||
|
|
|
||
|
|
#ifndef Atari2600_CartridgeParkerBros_hpp
|
||
|
|
#define Atari2600_CartridgeParkerBros_hpp
|
||
|
|
|
||
|
|
#include "Cartridge.hpp"
|
||
|
|
|
||
|
|
namespace Atari2600 {
|
||
|
|
|
||
|
|
class CartridgeParkerBros: public Cartridge<CartridgeParkerBros> {
|
||
|
|
public:
|
||
|
|
CartridgeParkerBros(const std::vector<uint8_t> &rom) :
|
||
|
|
Cartridge(rom) {
|
||
|
|
rom_ptr_[0] = rom_.data() + 4096;
|
||
|
|
rom_ptr_[1] = rom_ptr_[0] + 1024;
|
||
|
|
rom_ptr_[2] = rom_ptr_[1] + 1024;
|
||
|
|
rom_ptr_[3] = rom_ptr_[2] + 1024;
|
||
|
|
}
|
||
|
|
|
||
|
|
void perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value) {
|
||
|
|
address &= 0x1fff;
|
||
|
|
if(!(address & 0x1000)) return;
|
||
|
|
|
||
|
|
if(address >= 0x1fe0 && address < 0x1ff8) {
|
||
|
|
int slot = (address >> 3)&3;
|
||
|
|
rom_ptr_[slot] = rom_.data() + ((address & 7) * 1024);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(isReadOperation(operation)) {
|
||
|
|
*value = rom_ptr_[(address >> 10)&3][address & 1023];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
uint8_t *rom_ptr_[4];
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* Atari2600_CartridgeParkerBros_hpp */
|