mirror of
https://github.com/akuker/RASCSI.git
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125 lines
2.8 KiB
C++
125 lines
2.8 KiB
C++
//---------------------------------------------------------------------------
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//
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// X68000 EMULATOR "XM6"
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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//
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//---------------------------------------------------------------------------
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#pragma once
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#include "shared/config.h"
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#include "shared/scsi.h"
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#include <cstdint>
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#include <array>
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#include <vector>
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#include <unordered_map>
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using namespace std;
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class BUS
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{
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public:
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// Operation modes definition
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enum class mode_e {
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TARGET = 0,
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INITIATOR = 1,
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MONITOR = 2,
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};
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// Phase definitions
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enum class phase_t : int {
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busfree,
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arbitration,
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selection,
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reselection,
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command,
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datain,
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dataout,
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status,
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msgin,
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msgout,
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reserved
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};
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BUS() = default;
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virtual ~BUS() = default;
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static int GetCommandByteCount(uint8_t);
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virtual bool Init(mode_e mode) = 0;
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virtual void Reset() = 0;
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virtual void Cleanup() = 0;
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phase_t GetPhase();
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static phase_t GetPhase(int mci)
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{
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return phase_table[mci];
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}
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// Get the string phase name, based upon the raw data
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static const char* GetPhaseStrRaw(phase_t current_phase);
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// Extract as specific pin field from a raw data capture
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static inline uint32_t GetPinRaw(uint32_t raw_data, uint32_t pin_num)
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{
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return ((raw_data >> pin_num) & 1);
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}
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virtual bool GetBSY() const = 0;
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virtual void SetBSY(bool ast) = 0;
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virtual bool GetSEL() const = 0;
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virtual void SetSEL(bool ast) = 0;
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virtual bool GetATN() const = 0;
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virtual void SetATN(bool ast) = 0;
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virtual bool GetACK() const = 0;
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virtual void SetACK(bool ast) = 0;
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virtual bool GetRST() const = 0;
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virtual void SetRST(bool ast) = 0;
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virtual bool GetMSG() const = 0;
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virtual void SetMSG(bool ast) = 0;
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virtual bool GetCD() const = 0;
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virtual void SetCD(bool ast) = 0;
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virtual bool GetIO() = 0;
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virtual void SetIO(bool ast) = 0;
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virtual bool GetREQ() const = 0;
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virtual void SetREQ(bool ast) = 0;
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virtual uint8_t GetDAT() = 0;
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virtual void SetDAT(uint8_t dat) = 0;
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virtual bool GetDP() const = 0; // Get parity signal
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virtual uint32_t Acquire() = 0;
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virtual int CommandHandShake(vector<uint8_t>&) = 0;
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virtual int ReceiveHandShake(uint8_t *buf, int count) = 0;
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virtual int SendHandShake(uint8_t *buf, int count, int delay_after_bytes) = 0;
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#ifdef USE_SEL_EVENT_ENABLE
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// SEL signal event polling
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virtual bool PollSelectEvent() = 0;
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// Clear SEL signal event
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virtual void ClearSelectEvent() = 0;
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#endif
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virtual bool GetSignal(int pin) const = 0;
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// Get SCSI input signal value
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virtual void SetSignal(int pin, bool ast) = 0;
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// Set SCSI output signal value
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static const int SEND_NO_DELAY = -1;
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// Passed into SendHandShake when we don't want to delay
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private:
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static const array<phase_t, 8> phase_table;
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static const unordered_map<phase_t, const char *> phase_str_mapping;
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};
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