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73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
//
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// Microdisc.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 22/11/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Microdisc_hpp
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#define Microdisc_hpp
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#include "../../Components/1770/1770.hpp"
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#include "../../Activity/Observer.hpp"
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#include <array>
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namespace Oric {
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class Microdisc: public WD::WD1770 {
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public:
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Microdisc();
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void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive);
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void set_control_register(uint8_t control);
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uint8_t get_interrupt_request_register();
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uint8_t get_data_request_register();
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bool get_interrupt_request_line();
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void run_for(const Cycles cycles);
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enum PagingFlags {
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/// Indicates that the BASIC ROM should be disabled; if this is set then either
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/// the Microdisc ROM or overlay RAM will be visible. If it is not set, BASIC
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/// should be visible.
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BASICDisable = (1 << 0),
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/// Indicates that the Microdisc ROM is disabled. If BASIC is disabled and the Microdisc
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/// is also disabled, overlay RAM should be visible.
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MicrodiscDisable = (1 << 1)
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};
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class Delegate: public WD1770::Delegate {
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public:
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virtual void microdisc_did_change_paging_flags(Microdisc *microdisc) = 0;
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};
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inline void set_delegate(Delegate *delegate) { delegate_ = delegate; WD1770::set_delegate(delegate); }
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inline int get_paging_flags() { return paging_flags_; }
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void set_activity_observer(Activity::Observer *observer);
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private:
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void set_control_register(uint8_t control, uint8_t changes);
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void set_head_load_request(bool head_load) override;
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bool get_drive_is_ready();
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std::array<std::shared_ptr<Storage::Disk::Drive>, 4> drives_;
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size_t selected_drive_;
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bool irq_enable_ = false;
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int paging_flags_ = BASICDisable;
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int head_load_request_counter_ = -1;
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bool head_load_request_ = false;
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Delegate *delegate_ = nullptr;
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uint8_t last_control_ = 0;
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Activity::Observer *observer_ = nullptr;
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std::string drive_name(size_t index);
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};
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}
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#endif /* Microdisc_hpp */
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