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CLK/Machines/Atari2600/Atari2600.hpp

106 lines
2.7 KiB
C++

//
// Atari2600.hpp
// CLK
//
// Created by Thomas Harte on 14/07/2015.
// Copyright © 2015 Thomas Harte. All rights reserved.
//
#ifndef Atari2600_cpp
#define Atari2600_cpp
#include <stdint.h>
#include "../../Processors/6502/CPU6502.hpp"
#include "../CRTMachine.hpp"
#include "PIA.hpp"
#include "Speaker.hpp"
#include "TIA.hpp"
#include "../ConfigurationTarget.hpp"
#include "Atari2600Inputs.h"
namespace Atari2600 {
const unsigned int number_of_upcoming_events = 6;
const unsigned int number_of_recorded_counters = 7;
class Machine:
public CPU6502::Processor<Machine>,
public CRTMachine::Machine,
public ConfigurationTarget::Machine,
public Outputs::CRT::Delegate {
public:
Machine();
~Machine();
void configure_as_target(const StaticAnalyser::Target &target);
void switch_region();
void set_digital_input(Atari2600DigitalInput input, bool state);
void set_switch_is_enabled(Atari2600Switch input, bool state);
// to satisfy CPU6502::Processor
unsigned int perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value);
void synchronise();
// to satisfy CRTMachine::Machine
virtual void setup_output(float aspect_ratio);
virtual void close_output();
virtual std::shared_ptr<Outputs::CRT::CRT> get_crt() { return tia_->get_crt(); }
virtual std::shared_ptr<Outputs::Speaker> get_speaker() { return speaker_; }
virtual void run_for_cycles(int number_of_cycles) { CPU6502::Processor<Machine>::run_for_cycles(number_of_cycles); }
// to satisfy Outputs::CRT::Delegate
virtual void crt_did_end_batch_of_frames(Outputs::CRT::CRT *crt, unsigned int number_of_frames, unsigned int number_of_unexpected_vertical_syncs);
private:
// ROM information
uint8_t *rom_, *rom_pages_[4];
size_t rom_size_;
StaticAnalyser::Atari2600PagingModel paging_model_;
// cartridge RAM expansion store
std::vector<uint8_t> ram_;
uint16_t ram_write_start_, ram_read_start_;
bool has_ram_;
// the RIOT and TIA
PIA mos6532_;
std::unique_ptr<TIA> tia_;
// joystick state
uint8_t tia_input_value_[2];
// outputs
std::shared_ptr<Speaker> speaker_;
// speaker backlog accumlation counter
unsigned int cycles_since_speaker_update_;
inline void update_audio();
// video backlog accumulation counter
unsigned int cycles_since_video_update_;
inline void update_video();
// RIOT backlog accumulation counter
unsigned int cycles_since_6532_update_;
inline void update_6532();
// output frame rate tracker
struct FrameRecord
{
unsigned int number_of_frames;
unsigned int number_of_unexpected_vertical_syncs;
FrameRecord() : number_of_frames(0), number_of_unexpected_vertical_syncs(0) {}
} frame_records_[4];
unsigned int frame_record_pointer_;
bool is_ntsc_;
};
}
#endif /* Atari2600_cpp */