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151 lines
3.1 KiB
C++
151 lines
3.1 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 <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,
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KeyCopy = 0x0000 | 0x02,
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KeyRight = 0x0000 | 0x01,
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KeyDelete = 0x0010 | 0x08,
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KeyReturn = 0x0010 | 0x04,
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KeyDown = 0x0010 | 0x02,
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KeyLeft = 0x0010 | 0x01,
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KeyColon = 0x0020 | 0x04,
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KeyUp = 0x0020 | 0x02,
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KeyMinus = 0x0020 | 0x01,
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KeySlash = 0x0030 | 0x08,
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KeySemiColon = 0x0030 | 0x04,
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KeyP = 0x0030 | 0x02,
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Key0 = 0x0030 | 0x01,
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KeyFullStop = 0x0040 | 0x08,
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KeyL = 0x0040 | 0x04,
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KeyO = 0x0040 | 0x02,
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Key9 = 0x0040 | 0x01,
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KeyComma = 0x0050 | 0x08,
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KeyK = 0x0050 | 0x04,
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KeyI = 0x0050 | 0x02,
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Key8 = 0x0050 | 0x01,
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KeyM = 0x0060 | 0x08,
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KeyJ = 0x0060 | 0x04,
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KeyU = 0x0060 | 0x02,
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Key7 = 0x0060 | 0x01,
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KeyN = 0x0070 | 0x08,
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KeyH = 0x0070 | 0x04,
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KeyY = 0x0070 | 0x02,
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Key6 = 0x0070 | 0x01,
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KeyB = 0x0080 | 0x08,
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KeyG = 0x0080 | 0x04,
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KeyT = 0x0080 | 0x02,
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Key5 = 0x0080 | 0x01,
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KeyV = 0x0090 | 0x08,
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KeyF = 0x0090 | 0x04,
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KeyR = 0x0090 | 0x02,
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Key4 = 0x0090 | 0x01,
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KeyC = 0x00a0 | 0x08,
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KeyD = 0x00a0 | 0x04,
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KeyE = 0x00a0 | 0x02,
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Key3 = 0x00a0 | 0x01,
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KeyX = 0x00b0 | 0x08,
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KeyS = 0x00b0 | 0x04,
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KeyW = 0x00b0 | 0x02,
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Key2 = 0x00b0 | 0x01,
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KeyZ = 0x00c0 | 0x08,
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KeyA = 0x00c0 | 0x04,
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KeyQ = 0x00c0 | 0x02,
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Key1 = 0x00c0 | 0x01,
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KeyShift = 0x00d0 | 0x08,
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KeyControl = 0x00d0 | 0x04,
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KeyFunc = 0x00d0 | 0x02,
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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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const char *get_signal_decoder();
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private:
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uint8_t _os[16384], _basic[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, _outputPosition;
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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 signal_interrupt(Interrupt interrupt);
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inline void evaluate_interrupts();
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};
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}
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#endif /* Electron_hpp */
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