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72 lines
1.5 KiB
C++
72 lines
1.5 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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InterruptRealTimeClock = 0x01,
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InterruptDisplayEnd = 0x02,
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InterruptTransmitDataEmpty = 0x04,
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InterruptReceiveDataFull = 0x08,
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InterruptHighToneDetect = 0x10
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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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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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ROMSlot _activeRom;
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Outputs::CRT *_crt;
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int _frameCycles, _outputPosition;
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uint16_t _startScreenAddress, _currentScreenAddress;
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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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