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118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
//
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// Electron.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 03/01/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Electron_hpp
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#define Electron_hpp
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#include "../../Processors/6502/CPU6502.hpp"
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#include "../../Outputs/CRT.hpp"
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#include "../../Outputs/Speaker.hpp"
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#include <stdint.h>
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#include "Atari2600Inputs.h"
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namespace Electron {
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enum ROMSlot: uint8_t {
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ROMSlot0 = 0,
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ROMSlot1, ROMSlot2, ROMSlot3,
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ROMSlot4, ROMSlot5, ROMSlot6, ROMSlot7,
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ROMSlotKeyboard = 8, ROMSlot9,
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ROMSlotBASIC = 10, ROMSlot11,
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ROMSlot12, ROMSlot13, ROMSlot14, ROMSlot15,
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ROMSlotOS
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};
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enum Interrupt: uint8_t {
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InterruptDisplayEnd = 0x04,
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InterruptRealTimeClock = 0x08,
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InterruptTransmitDataEmpty = 0x10,
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InterruptReceiveDataFull = 0x20,
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InterruptHighToneDetect = 0x40
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};
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enum Key: uint16_t {
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KeySpace = 0x0000 | 0x08, KeyCopy = 0x0000 | 0x02, KeyRight = 0x0000 | 0x01,
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KeyDelete = 0x0010 | 0x08, KeyReturn = 0x0010 | 0x04, KeyDown = 0x0010 | 0x02, KeyLeft = 0x0010 | 0x01,
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KeyColon = 0x0020 | 0x04, KeyUp = 0x0020 | 0x02, KeyMinus = 0x0020 | 0x01,
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KeySlash = 0x0030 | 0x08, KeySemiColon = 0x0030 | 0x04, KeyP = 0x0030 | 0x02, Key0 = 0x0030 | 0x01,
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KeyFullStop = 0x0040 | 0x08, KeyL = 0x0040 | 0x04, KeyO = 0x0040 | 0x02, Key9 = 0x0040 | 0x01,
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KeyComma = 0x0050 | 0x08, KeyK = 0x0050 | 0x04, KeyI = 0x0050 | 0x02, Key8 = 0x0050 | 0x01,
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KeyM = 0x0060 | 0x08, KeyJ = 0x0060 | 0x04, KeyU = 0x0060 | 0x02, Key7 = 0x0060 | 0x01,
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KeyN = 0x0070 | 0x08, KeyH = 0x0070 | 0x04, KeyY = 0x0070 | 0x02, Key6 = 0x0070 | 0x01,
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KeyB = 0x0080 | 0x08, KeyG = 0x0080 | 0x04, KeyT = 0x0080 | 0x02, Key5 = 0x0080 | 0x01,
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KeyV = 0x0090 | 0x08, KeyF = 0x0090 | 0x04, KeyR = 0x0090 | 0x02, Key4 = 0x0090 | 0x01,
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KeyC = 0x00a0 | 0x08, KeyD = 0x00a0 | 0x04, KeyE = 0x00a0 | 0x02, Key3 = 0x00a0 | 0x01,
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KeyX = 0x00b0 | 0x08, KeyS = 0x00b0 | 0x04, KeyW = 0x00b0 | 0x02, Key2 = 0x00b0 | 0x01,
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KeyZ = 0x00c0 | 0x08, KeyA = 0x00c0 | 0x04, KeyQ = 0x00c0 | 0x02, Key1 = 0x00c0 | 0x01,
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KeyShift = 0x00d0 | 0x08, KeyControl = 0x00d0 | 0x04, KeyFunc = 0x00d0 | 0x02, KeyEscape = 0x00d0 | 0x01,
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KeyBreak = 0xffff
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};
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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(ROMSlot slot, size_t length, const uint8_t *data);
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void set_key_state(Key key, bool isPressed);
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Outputs::CRT *get_crt() { return _crt; }
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Outputs::Speaker *get_speaker() { return &_speaker; }
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const char *get_signal_decoder();
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private:
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uint8_t _roms[16][16384];
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uint8_t _os[16384], _ram[32768];
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uint8_t _interruptStatus, _interruptControl;
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uint8_t _palette[16];
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uint8_t _keyStates[14];
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ROMSlot _activeRom;
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uint8_t _screenMode;
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uint16_t _screenModeBaseAddress;
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Outputs::CRT *_crt;
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int _frameCycles, _displayOutputPosition, _audioOutputPosition, _audioOutputPositionError;
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uint16_t _startScreenAddress, _startLineAddress, _currentScreenAddress;
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int _currentOutputLine;
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uint8_t *_currentLine;
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inline void update_display();
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inline void update_audio();
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inline void signal_interrupt(Interrupt interrupt);
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inline void evaluate_interrupts();
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class Speaker: public ::Outputs::Filter<Speaker> {
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public:
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void set_divider(uint8_t divider);
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void set_is_enabled(bool is_enabled);
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inline bool get_is_enabled() { return _is_enabled; }
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void get_sample_range(uint64_t start_time, int number_of_samples, uint16_t *target);
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private:
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uint8_t _divider;
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bool _is_enabled;
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} _speaker;
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};
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}
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#endif /* Electron_hpp */
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