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CLK/Machines/Atari2600.hpp

66 lines
1.2 KiB
C++

//
// Atari2600.hpp
// ElectrEm
//
// Created by Thomas Harte on 14/07/2015.
// Copyright © 2015 Thomas Harte. All rights reserved.
//
#ifndef Atari2600_cpp
#define Atari2600_cpp
#include "../Processors/6502/CPU6502.hpp"
#include "../Outputs/CRT.hpp"
namespace Atari2600 {
class Machine: public CPU6502::Processor<Machine> {
public:
Machine();
void perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value);
void set_rom(size_t length, const uint8_t *data);
Outputs::CRT *get_crt() { return _crt; }
private:
uint8_t _rom[4096], _ram[128];
uint16_t _romMask;
uint64_t _timestamp;
// the timer
unsigned int _piaTimerValue;
unsigned int _piaTimerShift;
// graphics registers
uint8_t _playField[3], _playFieldControl;
// graphics output
int _horizontalTimer;
bool _vSyncEnabled, _vBlankEnabled;
enum OutputState {
Sync,
Blank,
Pixel
};
void output_pixels(int count);
void get_output_pixel(uint8_t *pixel, int offset);
void output_state(OutputState state, uint8_t *pixel);
Outputs::CRT *_crt;
// latched output state
int _lastOutputStateDuration;
OutputState _lastOutputState;
uint8_t *_outputBuffer;
};
}
#endif /* Atari2600_cpp */