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157 lines
4.9 KiB
C++
157 lines
4.9 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 "../../Storage/Tape/Tape.hpp"
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#include "../ConfigurationTarget.hpp"
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#include "../CRTMachine.hpp"
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#include "../Typer.hpp"
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#include "Interrupts.hpp"
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#include "Plus3.hpp"
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#include "Speaker.hpp"
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#include "Tape.hpp"
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#include "Video.hpp"
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#include <cstdint>
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#include <vector>
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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, ROMSlotDFS, ROMSlotADFS
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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 = 0xfffd,
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TerminateSequence = 0xffff, NotMapped = 0xfffe,
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};
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/*!
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@abstract Represents an Acorn Electron.
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@discussion An instance of Electron::Machine represents the current state of an
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Acorn Electron.
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*/
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class Machine:
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public CPU6502::Processor<Machine>,
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public CRTMachine::Machine,
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public Tape::Delegate,
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public Utility::TypeRecipient,
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public ConfigurationTarget::Machine {
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public:
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Machine();
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void set_rom(ROMSlot slot, std::vector<uint8_t> data, bool is_writeable);
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void set_key_state(uint16_t key, bool isPressed);
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void clear_all_keys();
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inline void set_use_fast_tape_hack(bool activate) { use_fast_tape_hack_ = activate; }
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// to satisfy ConfigurationTarget::Machine
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void configure_as_target(const StaticAnalyser::Target &target);
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// to satisfy CPU6502::Processor
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unsigned int perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value);
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void synchronise();
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// to satisfy CRTMachine::Machine
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virtual void setup_output(float aspect_ratio);
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virtual void close_output();
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virtual std::shared_ptr<Outputs::CRT::CRT> get_crt();
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virtual std::shared_ptr<Outputs::Speaker> get_speaker();
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virtual void run_for_cycles(int number_of_cycles) { CPU6502::Processor<Machine>::run_for_cycles(number_of_cycles); }
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// to satisfy Tape::Delegate
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virtual void tape_did_change_interrupt_status(Tape *tape);
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// for Utility::TypeRecipient
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virtual int get_typer_delay();
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virtual int get_typer_frequency();
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uint16_t *sequence_for_character(Utility::Typer *typer, char character);
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private:
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inline void update_display();
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inline void queue_next_display_interrupt();
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inline void update_audio();
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inline void signal_interrupt(Interrupt interrupt);
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inline void clear_interrupt(Interrupt interrupt);
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inline void evaluate_interrupts();
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// Things that directly constitute the memory map.
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uint8_t roms_[16][16384];
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bool rom_write_masks_[16];
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uint8_t os_[16384], ram_[32768];
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std::vector<uint8_t> dfs_, adfs_;
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// Paging
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ROMSlot active_rom_;
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bool keyboard_is_active_, basic_is_active_;
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// Interrupt and keyboard state
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uint8_t interrupt_status_, interrupt_control_;
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uint8_t key_states_[14];
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// Counters related to simultaneous subsystems
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unsigned int cycles_since_display_update_;
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unsigned int cycles_since_audio_update_;
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int cycles_until_display_interrupt_;
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Interrupt next_display_interrupt_;
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VideoOutput::Range video_access_range_;
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// Tape
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Tape tape_;
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bool use_fast_tape_hack_;
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bool fast_load_is_in_data_;
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// Disk
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std::unique_ptr<Plus3> plus3_;
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bool is_holding_shift_;
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// Outputs
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std::unique_ptr<VideoOutput> video_output_;
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std::shared_ptr<Speaker> speaker_;
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bool speaker_is_enabled_;
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};
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}
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#endif /* Electron_hpp */
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