MB89352.hh

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/* Ported from:
** Source: /cvsroot/bluemsx/blueMSX/Src/IoDevice/MB89352.h,v
** Revision: 1.4
** Date: 2007/03/28 17:35:35
**
** More info: http://www.bluemsx.com
**
** Copyright (C) 2003-2007 Daniel Vik, white cat
*/

#ifndef MB89352_HH
#define MB89352_HH

#include "SCSI.hh"
#include "SCSIDevice.hh"
#include "AlignedBuffer.hh"
#include <memory>

namespace openmsx {

class DeviceConfig;

class MB89352
{
public:
        explicit MB89352(const DeviceConfig& config);

        void reset(bool scsireset);
        byte readRegister(byte reg);
        byte peekRegister(byte reg) const;
        byte readDREG();
        byte peekDREG() const;
        void writeRegister(byte reg, byte value);
        void writeDREG(byte value);

        template<typename Archive>
        void serialize(Archive& ar, unsigned version);

private:
        void disconnect();
        void softReset();
        void setACKREQ(byte& value);
        void resetACKREQ();
        byte getSSTS() const;

        std::unique_ptr<SCSIDevice> dev[8];
        AlignedByteArray<SCSIDevice::BUFFER_SIZE> buffer; // buffer for transfer
        unsigned cdbIdx;                // cdb index
        unsigned bufIdx;                // buffer index
        int msgin;                      // Message In flag
        int counter;                    // read and written number of bytes
                                        // within the range in the buffer
        unsigned blockCounter;          // Number of blocks outside buffer
                                        // (512bytes / block)
        int tc;                         // counter for hardware transfer
        SCSI::Phase phase;              //
        SCSI::Phase nextPhase;          // for message system
        byte myId;                      // SPC SCSI ID 0..7
        byte targetId;                  // SCSI Device target ID 0..7
        byte regs[16];                  // SPC register
        bool rst;                       // SCSI bus reset signal
        byte atn;                       // SCSI bus attention signal
        bool isEnabled;                 // spc enable flag
        bool isBusy;                    // spc now working
        bool isTransfer;                // hardware transfer mode
        //TODO: bool devBusy;           // CDROM busy (buffer conflict prevention)
        byte cdb[12];                   // Command Descripter Block
};

} // namespace openmsx

#endif