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94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
//
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// 65816.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 23/09/2020.
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// Copyright © 2020 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <vector>
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#include "../../Numeric/RegisterSizes.hpp"
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#include "../../ClockReceiver/ClockReceiver.hpp"
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#include "../6502Esque/6502Esque.hpp"
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#include "../6502Esque/Implementation/LazyFlags.hpp"
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namespace CPU::WDC65816 {
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using BusOperation = CPU::MOS6502Esque::BusOperation;
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using Register = CPU::MOS6502Esque::Register;
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using Flag = CPU::MOS6502Esque::Flag;
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enum ExtendedBusOutput {
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Emulation = (1 << 0),
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MemorySize = (1 << 1),
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IndexSize = (1 << 2),
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MemoryLock = (1 << 3),
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};
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#include "Implementation/65816Storage.hpp"
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class ProcessorBase: protected ProcessorStorage {
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public:
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inline void set_power_on(bool);
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inline void set_irq_line(bool);
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inline void set_nmi_line(bool);
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inline void set_reset_line(bool);
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inline void set_abort_line(bool);
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inline bool get_is_resetting() const;
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/*!
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Returns the current state of all lines not ordinarily pushed to the BusHandler,
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as listed in the ExtendedBusOutput enum.
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*/
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inline int get_extended_bus_output();
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/*!
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Provided for symmetry with the 6502; a 65816 is never jammed.
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*/
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inline bool is_jammed() const;
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/*!
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FOR TESTING PURPOSES ONLY: forces the processor into a state where
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the next thing it intends to do is fetch a new opcode.
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*/
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inline void restart_operation_fetch();
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void set_value_of(Register r, uint16_t value);
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uint16_t value_of(Register r) const;
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};
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template <typename BusHandler, bool uses_ready_line> class Processor: public ProcessorBase {
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public:
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/*!
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Constructs an instance of the 6502 that will use @c bus_handler for all bus communications.
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*/
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Processor(BusHandler &bus_handler) : bus_handler_(bus_handler) {}
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/*!
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Runs the 6502 for a supplied number of cycles.
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@param cycles The number of cycles to run the 6502 for.
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*/
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void run_for(const Cycles cycles);
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/*!
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Sets the current level of the RDY line.
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@param active @c true if the line is logically active; @c false otherwise.
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*/
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void set_ready_line(bool active);
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private:
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BusHandler &bus_handler_;
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};
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#include "Implementation/65816Implementation.hpp"
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}
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