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107 lines
2.3 KiB
C++
107 lines
2.3 KiB
C++
//
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// Atari2600.hpp
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// CLK
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//
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// Created by Thomas Harte on 14/07/2015.
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// Copyright © 2015 Thomas Harte. All rights reserved.
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//
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#ifndef Atari2600_cpp
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#define Atari2600_cpp
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#include "../../Processors/6502/CPU6502.hpp"
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#include "../../Outputs/CRT.hpp"
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#include <stdint.h>
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#include "Atari2600Inputs.h"
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namespace Atari2600 {
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class Machine: public CPU6502::Processor<Machine> {
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public:
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Machine();
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~Machine();
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unsigned int perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value);
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void set_rom(size_t length, const uint8_t *data);
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void switch_region();
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void set_digital_input(Atari2600DigitalInput input, bool state);
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Outputs::CRT *get_crt() { return _crt; }
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const char *get_signal_decoder();
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private:
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uint8_t *_rom, *_romPages[4], _ram[128];
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size_t _rom_size;
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uint64_t _timestamp;
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// the timer
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unsigned int _piaTimerValue;
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unsigned int _piaTimerShift, _writtenPiaTimerShift;
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uint8_t _piaTimerStatus;
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// playfield registers
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uint8_t _playfieldControl;
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uint8_t _playfieldColour;
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uint8_t _backgroundColour;
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uint8_t _playfield[40];
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// player registers
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uint8_t _playerColour[2];
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uint8_t _playerReflection[2];
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uint8_t _playerGraphicsLatch[2], _playerGraphics[2];
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uint8_t _playerGraphicsLatchEnable[2];
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bool _playerStart[2];
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// player + missile registers
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uint8_t _playerAndMissileSize[2];
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// missile registers
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uint8_t _missileGraphicsEnable[2], _missileGraphicsReset[2];
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// ball registers
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uint8_t _ballGraphicsEnable, _ballGraphicsEnableLatch;
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uint8_t _ballGraphicsEnableDelay;
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// graphics output
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int32_t _horizontalTimer;
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bool _vSyncEnabled, _vBlankEnabled;
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bool _vBlankExtend;
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uint8_t _hMoveCounter;
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bool _hMoveIsCounting, _hMoveWillCount;
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uint8_t _objectCounter[5], _objectMotion[5];
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uint8_t _hMoveFlags;
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// joystick state
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uint8_t _piaDataDirection[2];
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uint8_t _piaDataValue[2];
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uint8_t _tiaInputValue[2];
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// collisions
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uint8_t _collisions[8];
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enum OutputState {
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Sync,
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Blank,
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Pixel
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};
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void output_pixels(unsigned int count);
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void get_output_pixel(uint8_t *pixel, int offset);
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Outputs::CRT *_crt;
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// latched output state
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unsigned int _lastOutputStateDuration;
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OutputState _lastOutputState;
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uint8_t *_outputBuffer;
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};
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}
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#endif /* Atari2600_cpp */
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