/* AppleWin : An Apple //e emulator for Windows Copyright (C) 1994-1996, Michael O'Brien Copyright (C) 1999-2001, Oliver Schmidt Copyright (C) 2002-2005, Tom Charlesworth Copyright (C) 2006-2019, Tom Charlesworth, Michael Pohoreski, Nick Westgate AppleWin is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. AppleWin is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with AppleWin; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Description: Disk * * Author: Various * * In comments, UTAIIe is an abbreviation for a reference to "Understanding the Apple //e" by James Sather */ #include "StdAfx.h" #include "SaveState_Structs_v1.h" #include "Applewin.h" #include "CPU.h" #include "Disk.h" #include "DiskImage.h" #include "Frame.h" #include "Log.h" #include "Memory.h" #include "Registry.h" #include "Video.h" #include "YamlHelper.h" #include "../resource/resource.h" // About m_enhanceDisk: // . In general m_enhanceDisk==false is used for authentic disk access speed, whereas m_enhanceDisk==true is for enhanced speed. // Details: // . if false: Used by ImageReadTrack() to skew the sectors in a track (for .do, .dsk, .po 5.25" images). // . if true && m_floppyMotorOn, then this is a condition for full-speed (unthrottled) emulation mode. // . if false && I/O ReadWrite($C0EC) && drive is spinning, then advance the track buffer's nibble index (to simulate spinning). // . if I/O ReadWrite($C0EC) && read, then depending on true/false support partial nibble reads for different gaps between consecutive accesses. // Also m_enhanceDisk is persisted to the save-state, so it's an attribute of the DiskII interface card. Disk2InterfaceCard::Disk2InterfaceCard(void) { ResetSwitches(); m_floppyLatch = 0; m_saveDiskImage = true; // Save the DiskImage name to Registry m_slot = 0; m_diskLastCycle = 0; m_diskLastReadLatchCycle = 0; m_enhanceDisk = true; ResetLogicStateSequencer(); // Debug: #if LOG_DISK_NIBBLES_USE_RUNTIME_VAR m_bLogDisk_NibblesRW = false; #endif #if LOG_DISK_NIBBLES_WRITE m_uWriteLastCycle = 0; m_uSyncFFCount = 0; #endif } bool Disk2InterfaceCard::GetEnhanceDisk(void) { return m_enhanceDisk; } void Disk2InterfaceCard::SetEnhanceDisk(bool bEnhanceDisk) { m_enhanceDisk = bEnhanceDisk; } int Disk2InterfaceCard::GetCurrentDrive(void) { return m_currDrive; } int Disk2InterfaceCard::GetCurrentTrack(void) { return ImagePhaseToTrack(m_floppyDrive[m_currDrive].m_disk.m_imagehandle, m_floppyDrive[m_currDrive].m_phasePrecise, false); } float Disk2InterfaceCard::GetCurrentPhase(void) { return m_floppyDrive[m_currDrive].m_phasePrecise; } int Disk2InterfaceCard::GetCurrentOffset(void) { return m_floppyDrive[m_currDrive].m_disk.m_byte; } BYTE Disk2InterfaceCard::GetCurrentLSSBitMask(void) { return m_floppyDrive[m_currDrive].m_disk.m_bitMask; } double Disk2InterfaceCard::GetCurrentExtraCycles(void) { return m_floppyDrive[m_currDrive].m_disk.m_extraCycles; } int Disk2InterfaceCard::GetTrack(const int drive) { return ImagePhaseToTrack(m_floppyDrive[drive].m_disk.m_imagehandle, m_floppyDrive[drive].m_phasePrecise, false); } std::string Disk2InterfaceCard::GetCurrentTrackString(void) { const UINT trackInt = (UINT)(m_floppyDrive[m_currDrive].m_phasePrecise / 2); const float trackFrac = (m_floppyDrive[m_currDrive].m_phasePrecise / 2) - (float)trackInt; char szInt[8] = ""; sprintf(szInt, "%02X", trackInt); // "$NN" char szFrac[8] = ""; sprintf(szFrac, "%.02f", trackFrac); // "0.nn" return std::string(szInt) + std::string(szFrac+1); } std::string Disk2InterfaceCard::GetCurrentPhaseString(void) { const UINT phaseInt = (UINT)(m_floppyDrive[m_currDrive].m_phasePrecise); const float phaseFrac = m_floppyDrive[m_currDrive].m_phasePrecise - (float)phaseInt; char szInt[8] = ""; sprintf(szInt, "%02X", phaseInt); // "$NN" char szFrac[8] = ""; sprintf(szFrac, "%.02f", phaseFrac); // "0.nn" return std::string(szInt) + std::string(szFrac+1); } LPCTSTR Disk2InterfaceCard::GetCurrentState(void) { if (m_floppyDrive[m_currDrive].m_disk.m_imagehandle == NULL) return "Empty"; if (!m_floppyMotorOn) { if (m_floppyDrive[m_currDrive].m_spinning > 0) return "Off (spinning)"; else return "Off"; } else if (m_floppyWriteMode) { if (m_floppyDrive[m_currDrive].m_disk.m_bWriteProtected) return "Writing (write protected)"; else return "Writing"; } else { /*if (m_floppyLoadMode) { if (m_floppyDrive[m_currDrive].disk.bWriteProtected) return "Reading write protect state (write protected)"; else return "Reading write protect state (not write protected)"; } else*/ return "Reading"; } } //=========================================================================== void Disk2InterfaceCard::LoadLastDiskImage(const int drive) { _ASSERT(drive == DRIVE_1 || drive == DRIVE_2); const TCHAR *pRegKey = (drive == DRIVE_1) ? TEXT(REGVALUE_PREF_LAST_DISK_1) : TEXT(REGVALUE_PREF_LAST_DISK_2); TCHAR sFilePath[MAX_PATH]; if (RegLoadString(TEXT(REG_PREFS), pRegKey, 1, sFilePath, MAX_PATH, TEXT(""))) { m_saveDiskImage = false; // Pass in ptr to local copy of filepath, since RemoveDisk() sets DiskPathFilename = "" InsertDisk(drive, sFilePath, IMAGE_USE_FILES_WRITE_PROTECT_STATUS, IMAGE_DONT_CREATE); m_saveDiskImage = true; } } //=========================================================================== void Disk2InterfaceCard::SaveLastDiskImage(const int drive) { _ASSERT(drive == DRIVE_1 || drive == DRIVE_2); if (!m_saveDiskImage) return; const TCHAR *pFileName = m_floppyDrive[drive].m_disk.m_fullname; if (drive == DRIVE_1) RegSaveString(TEXT(REG_PREFS), TEXT(REGVALUE_PREF_LAST_DISK_1), TRUE, pFileName); else RegSaveString(TEXT(REG_PREFS), TEXT(REGVALUE_PREF_LAST_DISK_2), TRUE, pFileName); // TCHAR szPathName[MAX_PATH]; StringCbCopy(szPathName, MAX_PATH, DiskGetFullPathName(drive)); TCHAR* slash = _tcsrchr(szPathName, TEXT('\\')); if (slash != NULL) { slash[1] = '\0'; RegSaveString(TEXT(REG_PREFS), TEXT(REGVALUE_PREF_START_DIR), 1, szPathName); } } //=========================================================================== // Called by ControlMotor() & Enable() void Disk2InterfaceCard::CheckSpinning(const ULONG uExecutedCycles) { DWORD modechange = (m_floppyMotorOn && !m_floppyDrive[m_currDrive].m_spinning); if (m_floppyMotorOn) m_floppyDrive[m_currDrive].m_spinning = SPINNING_CYCLES; if (modechange) FrameDrawDiskLEDS( (HDC)0 ); if (modechange) { // Set m_diskLastCycle when motor changes: not spinning (ie. off for 1 sec) -> on CpuCalcCycles(uExecutedCycles); m_diskLastCycle = g_nCumulativeCycles; } } //=========================================================================== Disk_Status_e Disk2InterfaceCard::GetDriveLightStatus(const int drive) { if (IsDriveValid( drive )) { FloppyDrive* pDrive = &m_floppyDrive[ drive ]; if (pDrive->m_spinning) { if (pDrive->m_disk.m_bWriteProtected) return DISK_STATUS_PROT; if (pDrive->m_writelight) return DISK_STATUS_WRITE; else return DISK_STATUS_READ; } else { return DISK_STATUS_OFF; } } return DISK_STATUS_OFF; } //=========================================================================== bool Disk2InterfaceCard::IsDriveValid(const int drive) { return (drive >= 0 && drive < NUM_DRIVES); } //=========================================================================== void Disk2InterfaceCard::AllocTrack(const int drive) { FloppyDisk* pFloppy = &m_floppyDrive[drive].m_disk; pFloppy->m_trackimage = (LPBYTE)VirtualAlloc(NULL, NIBBLES_PER_TRACK, MEM_COMMIT, PAGE_READWRITE); } //=========================================================================== void Disk2InterfaceCard::ReadTrack(const int drive, ULONG uExecutedCycles) { if (! IsDriveValid( drive )) return; FloppyDrive* pDrive = &m_floppyDrive[ drive ]; FloppyDisk* pFloppy = &pDrive->m_disk; if (ImagePhaseToTrack(pFloppy->m_imagehandle, pDrive->m_phasePrecise, false) >= ImageGetNumTracks(pFloppy->m_imagehandle)) { _ASSERT(0); // What can cause this? Add a comment to replace this assert. pFloppy->m_trackimagedata = false; return; } if (!pFloppy->m_trackimage) AllocTrack( drive ); if (pFloppy->m_trackimage && pFloppy->m_imagehandle) { #if LOG_DISK_TRACKS CpuCalcCycles(uExecutedCycles); const ULONG cycleDelta = (ULONG)(g_nCumulativeCycles - pDrive->m_lastStepperCycle); LOG_DISK("track $%s read (time since last stepper %.3fms)\r\n", GetCurrentTrackString().c_str(), ((float)cycleDelta) / (CLK_6502_NTSC / 1000.0)); #endif const UINT32 currentPosition = pFloppy->m_byte; const UINT32 currentTrackLength = pFloppy->m_nibbles; ImageReadTrack( pFloppy->m_imagehandle, pDrive->m_phasePrecise, pFloppy->m_trackimage, &pFloppy->m_nibbles, &pFloppy->m_bitCount, m_enhanceDisk); if (!ImageIsWOZ(pFloppy->m_imagehandle) || (currentTrackLength == 0)) { pFloppy->m_byte = 0; } else { _ASSERT(pFloppy->m_nibbles && pFloppy->m_bitCount); if (pFloppy->m_nibbles == 0 || pFloppy->m_bitCount == 0) { pFloppy->m_nibbles = 1; pFloppy->m_bitCount = 8; } pFloppy->m_byte = (currentPosition * pFloppy->m_nibbles) / currentTrackLength; // Ref: WOZ-1.01 if (pFloppy->m_byte == (pFloppy->m_nibbles-1)) // Last nibble may not be complete, so advance by 1 nibble pFloppy->m_byte = 0; pFloppy->m_bitOffset = pFloppy->m_byte*8; pFloppy->m_bitMask = 1 << 7; pFloppy->m_extraCycles = 0.0; pDrive->m_headWindow = 0; } pFloppy->m_trackimagedata = (pFloppy->m_nibbles != 0); } } //=========================================================================== void Disk2InterfaceCard::RemoveDisk(const int drive) { FloppyDisk* pFloppy = &m_floppyDrive[drive].m_disk; if (pFloppy->m_imagehandle) { FlushCurrentTrack(drive); ImageClose(pFloppy->m_imagehandle); pFloppy->m_imagehandle = NULL; } if (pFloppy->m_trackimage) { VirtualFree(pFloppy->m_trackimage, 0, MEM_RELEASE); pFloppy->m_trackimage = NULL; pFloppy->m_trackimagedata = false; } memset( pFloppy->m_imagename, 0, MAX_DISK_IMAGE_NAME+1 ); memset( pFloppy->m_fullname , 0, MAX_DISK_FULL_NAME +1 ); pFloppy->m_strFilenameInZip = ""; SaveLastDiskImage( drive ); Video_ResetScreenshotCounter( NULL ); } //=========================================================================== void Disk2InterfaceCard::WriteTrack(const int drive) { FloppyDrive* pDrive = &m_floppyDrive[ drive ]; FloppyDisk* pFloppy = &pDrive->m_disk; if (ImagePhaseToTrack(pFloppy->m_imagehandle, pDrive->m_phasePrecise, false) >= ImageGetNumTracks(pFloppy->m_imagehandle)) { _ASSERT(0); // What can cause this? Add a comment to replace this assert. return; } if (pFloppy->m_bWriteProtected) return; if (pFloppy->m_trackimage && pFloppy->m_imagehandle) { #if LOG_DISK_TRACKS LOG_DISK("track $%s write\r\n", GetCurrentTrackString().c_str()); #endif ImageWriteTrack( pFloppy->m_imagehandle, pDrive->m_phasePrecise, pFloppy->m_trackimage, pFloppy->m_nibbles); } pFloppy->m_trackimagedirty = false; } void Disk2InterfaceCard::FlushCurrentTrack(const int drive) { FloppyDisk* pFloppy = &m_floppyDrive[drive].m_disk; if (pFloppy->m_trackimage && pFloppy->m_trackimagedirty) WriteTrack(drive); } //=========================================================================== void Disk2InterfaceCard::Boot(void) { // THIS FUNCTION RELOADS A PROGRAM IMAGE IF ONE IS LOADED IN DRIVE ONE. // IF A DISK IMAGE OR NO IMAGE IS LOADED IN DRIVE ONE, IT DOES NOTHING. if (m_floppyDrive[0].m_disk.m_imagehandle && ImageBoot(m_floppyDrive[0].m_disk.m_imagehandle)) m_floppyMotorOn = 0; } //=========================================================================== void __stdcall Disk2InterfaceCard::ControlMotor(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles) { BOOL newState = address & 1; if (newState != m_floppyMotorOn) // motor changed state m_formatTrack.DriveNotWritingTrack(); m_floppyMotorOn = newState; // NB. Motor off doesn't reset the Command Decoder like reset. (UTAIIe figures 9.7 & 9.8 chip C2) // - so it doesn't reset this state: m_floppyLoadMode, m_floppyWriteMode, m_magnetStates #if LOG_DISK_MOTOR LOG_DISK("motor %s\r\n", (m_floppyMotorOn) ? "on" : "off"); #endif CheckSpinning(uExecutedCycles); } //=========================================================================== void __stdcall Disk2InterfaceCard::ControlStepper(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles) { FloppyDrive* pDrive = &m_floppyDrive[m_currDrive]; FloppyDisk* pFloppy = &pDrive->m_disk; if (!m_floppyMotorOn) // GH#525 { if (!pDrive->m_spinning) { #if LOG_DISK_PHASES LOG_DISK("stepper accessed whilst motor is off and not spinning\r\n"); #endif return; } #if LOG_DISK_PHASES LOG_DISK("stepper accessed whilst motor is off, but still spinning\r\n"); #endif } // update phases (magnet states) { const int phase = (address >> 1) & 3; const int phase_bit = (1 << phase); // update the magnet states if (address & 1) m_magnetStates |= phase_bit; // phase on else m_magnetStates &= ~phase_bit; // phase off } CpuCalcCycles(uExecutedCycles); #if LOG_DISK_PHASES const ULONG cycleDelta = (ULONG)(g_nCumulativeCycles - pDrive->m_lastStepperCycle); #endif pDrive->m_lastStepperCycle = g_nCumulativeCycles; // check for any stepping effect from a magnet // - move only when the magnet opposite the cog is off // - move in the direction of an adjacent magnet if one is on // - do not move if both adjacent magnets are on (ie. quarter track) // momentum and timing are not accounted for ... maybe one day! int direction = 0; if (m_magnetStates & (1 << ((pDrive->m_phase + 1) & 3))) direction += 1; if (m_magnetStates & (1 << ((pDrive->m_phase + 3) & 3))) direction -= 1; // Only calculate quarterDirection for WOZ, as NIB/DSK don't support half phases. int quarterDirection = 0; if (ImageIsWOZ(pFloppy->m_imagehandle)) { if ((m_magnetStates == 0xC || // 1100 m_magnetStates == 0x6 || // 0110 m_magnetStates == 0x3 || // 0011 m_magnetStates == 0x9)) // 1001 { quarterDirection = direction; direction = 0; } } pDrive->m_phase = MAX(0, MIN(79, pDrive->m_phase + direction)); float newPhasePrecise = (float)(pDrive->m_phase) + (float)quarterDirection * 0.5f; if (newPhasePrecise < 0) newPhasePrecise = 0; // apply magnet step, if any if (newPhasePrecise != pDrive->m_phasePrecise) { FlushCurrentTrack(m_currDrive); pDrive->m_phasePrecise = newPhasePrecise; pFloppy->m_trackimagedata = false; m_formatTrack.DriveNotWritingTrack(); FrameDrawDiskStatus((HDC)0); // Show track status (GH#201) } #if LOG_DISK_PHASES LOG_DISK("track $%s magnet-states %d%d%d%d phase %d %s address $%4X last-stepper %.3fms\r\n", GetCurrentTrackString().c_str(), (m_magnetStates >> 3) & 1, (m_magnetStates >> 2) & 1, (m_magnetStates >> 1) & 1, (m_magnetStates >> 0) & 1, (address >> 1) & 3, // phase (address & 1) ? "on " : "off", address, ((float)cycleDelta)/(CLK_6502_NTSC/1000.0)); #endif } //=========================================================================== void Disk2InterfaceCard::Destroy(void) { m_saveDiskImage = false; RemoveDisk(DRIVE_1); m_saveDiskImage = false; RemoveDisk(DRIVE_2); m_saveDiskImage = true; } //=========================================================================== void __stdcall Disk2InterfaceCard::Enable(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles) { m_currDrive = address & 1; #if LOG_DISK_ENABLE_DRIVE LOG_DISK("enable drive: %d\r\n", m_currDrive); #endif m_floppyDrive[!m_currDrive].m_spinning = 0; m_floppyDrive[!m_currDrive].m_writelight = 0; CheckSpinning(uExecutedCycles); } //=========================================================================== void Disk2InterfaceCard::EjectDisk(const int drive) { if (IsDriveValid(drive)) { RemoveDisk(drive); } } //=========================================================================== // Return the filename // . Used by Drive Buttons' tooltips LPCTSTR Disk2InterfaceCard::GetFullDiskFilename(const int drive) { if (!m_floppyDrive[drive].m_disk.m_strFilenameInZip.empty()) return m_floppyDrive[drive].m_disk.m_strFilenameInZip.c_str(); return GetFullName(drive); } // Return the file or zip name // . Used by Property Sheet Page (Disk) LPCTSTR Disk2InterfaceCard::GetFullName(const int drive) { return m_floppyDrive[drive].m_disk.m_fullname; } // Return the imagename // . Used by Drive Button's icons & Property Sheet Page (Save snapshot) LPCTSTR Disk2InterfaceCard::GetBaseName(const int drive) { return m_floppyDrive[drive].m_disk.m_imagename; } LPCTSTR Disk2InterfaceCard::DiskGetFullPathName(const int drive) { return ImageGetPathname(m_floppyDrive[drive].m_disk.m_imagehandle); } //=========================================================================== void Disk2InterfaceCard::GetLightStatus(Disk_Status_e *pDisk1Status, Disk_Status_e *pDisk2Status) { if (pDisk1Status) *pDisk1Status = GetDriveLightStatus(DRIVE_1); if (pDisk2Status) *pDisk2Status = GetDriveLightStatus(DRIVE_2); } //=========================================================================== ImageError_e Disk2InterfaceCard::InsertDisk(const int drive, LPCTSTR pszImageFilename, const bool bForceWriteProtected, const bool bCreateIfNecessary) { FloppyDrive* pDrive = &m_floppyDrive[drive]; FloppyDisk* pFloppy = &pDrive->m_disk; if (pFloppy->m_imagehandle) RemoveDisk(drive); // Reset the disk's attributes, but preserve the drive's attributes (GH#138/Platoon, GH#640) // . Changing the disk (in the drive) doesn't affect the drive's attributes. pFloppy->clear(); const DWORD dwAttributes = GetFileAttributes(pszImageFilename); if(dwAttributes == INVALID_FILE_ATTRIBUTES) pFloppy->m_bWriteProtected = false; // Assume this is a new file to create else pFloppy->m_bWriteProtected = bForceWriteProtected ? true : (dwAttributes & FILE_ATTRIBUTE_READONLY); // Check if image is being used by the other drive, and if so remove it in order so it can be swapped { const char* pszOtherPathname = DiskGetFullPathName(!drive); char szCurrentPathname[MAX_PATH]; DWORD uNameLen = GetFullPathName(pszImageFilename, MAX_PATH, szCurrentPathname, NULL); if (uNameLen == 0 || uNameLen >= MAX_PATH) strcpy_s(szCurrentPathname, MAX_PATH, pszImageFilename); if (!strcmp(pszOtherPathname, szCurrentPathname)) { EjectDisk(!drive); FrameRefreshStatus(DRAW_LEDS | DRAW_BUTTON_DRIVES); } } ImageError_e Error = ImageOpen(pszImageFilename, &pFloppy->m_imagehandle, &pFloppy->m_bWriteProtected, bCreateIfNecessary, pFloppy->m_strFilenameInZip); if (Error == eIMAGE_ERROR_NONE && ImageIsMultiFileZip(pFloppy->m_imagehandle)) { TCHAR szText[100+MAX_PATH]; StringCbPrintf(szText, sizeof(szText), "Only the first file in a multi-file zip is supported\nUse disk image '%s' ?", pFloppy->m_strFilenameInZip.c_str()); int nRes = MessageBox(g_hFrameWindow, szText, TEXT("Multi-Zip Warning"), MB_ICONWARNING | MB_YESNO | MB_SETFOREGROUND); if (nRes == IDNO) { RemoveDisk(drive); Error = eIMAGE_ERROR_REJECTED_MULTI_ZIP; } } if (Error == eIMAGE_ERROR_NONE) { GetImageTitle(pszImageFilename, pFloppy->m_imagename, pFloppy->m_fullname); Video_ResetScreenshotCounter(pFloppy->m_imagename); } else { Video_ResetScreenshotCounter(NULL); } SaveLastDiskImage(drive); return Error; } //=========================================================================== bool Disk2InterfaceCard::IsConditionForFullSpeed(void) { return m_floppyMotorOn && m_enhanceDisk; } //=========================================================================== void Disk2InterfaceCard::NotifyInvalidImage(const int drive, LPCTSTR pszImageFilename, const ImageError_e Error) { TCHAR szBuffer[MAX_PATH + 128]; switch (Error) { case eIMAGE_ERROR_UNABLE_TO_OPEN: case eIMAGE_ERROR_UNABLE_TO_OPEN_GZ: case eIMAGE_ERROR_UNABLE_TO_OPEN_ZIP: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to open the file %s."), pszImageFilename); break; case eIMAGE_ERROR_BAD_SIZE: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the file %s\nbecause the ") TEXT("disk image is an unsupported size."), pszImageFilename); break; case eIMAGE_ERROR_BAD_FILE: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the file %s\nbecause the ") TEXT("OS can't access it."), pszImageFilename); break; case eIMAGE_ERROR_UNSUPPORTED: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the file %s\nbecause the ") TEXT("disk image format is not recognized."), pszImageFilename); break; case eIMAGE_ERROR_UNSUPPORTED_HDV: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the file %s\n") TEXT("because this UniDisk 3.5/Apple IIGS/hard-disk image is not supported.\n") TEXT("Try inserting as a hard-disk image instead."), pszImageFilename); break; case eIMAGE_ERROR_UNSUPPORTED_MULTI_ZIP: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the file %s\nbecause the ") TEXT("first file (%s) in this multi-zip archive is not recognized.\n") TEXT("Try unzipping and using the disk images directly.\n"), pszImageFilename, m_floppyDrive[drive].m_disk.m_strFilenameInZip.c_str()); break; case eIMAGE_ERROR_GZ: case eIMAGE_ERROR_ZIP: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to use the compressed file %s\nbecause the ") TEXT("compressed disk image is corrupt/unsupported."), pszImageFilename); break; case eIMAGE_ERROR_FAILED_TO_GET_PATHNAME: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unable to GetFullPathName() for the file: %s."), pszImageFilename); break; case eIMAGE_ERROR_ZEROLENGTH_WRITEPROTECTED: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Unsupported zero-length write-protected file: %s."), pszImageFilename); break; case eIMAGE_ERROR_FAILED_TO_INIT_ZEROLENGTH: StringCbPrintf( szBuffer, MAX_PATH + 128, TEXT("Failed to resize the zero-length file: %s."), pszImageFilename); break; default: // IGNORE OTHER ERRORS SILENTLY return; } MessageBox( g_hFrameWindow, szBuffer, g_pAppTitle, MB_ICONEXCLAMATION | MB_SETFOREGROUND); } //=========================================================================== bool Disk2InterfaceCard::GetProtect(const int drive) { if (IsDriveValid(drive)) { if (m_floppyDrive[drive].m_disk.m_bWriteProtected) return true; } return false; } //=========================================================================== void Disk2InterfaceCard::SetProtect(const int drive, const bool bWriteProtect) { if (IsDriveValid( drive )) { m_floppyDrive[drive].m_disk.m_bWriteProtected = bWriteProtect; } } //=========================================================================== bool Disk2InterfaceCard::IsDiskImageWriteProtected(const int drive) { if (!IsDriveValid(drive)) return true; return ImageIsWriteProtected(m_floppyDrive[drive].m_disk.m_imagehandle); } //=========================================================================== bool Disk2InterfaceCard::IsDriveEmpty(const int drive) { if (!IsDriveValid(drive)) return true; return m_floppyDrive[drive].m_disk.m_imagehandle == NULL; } //=========================================================================== #if LOG_DISK_NIBBLES_WRITE bool Disk2InterfaceCard::LogWriteCheckSyncFF(ULONG& uCycleDelta) { bool bIsSyncFF = false; if (m_uWriteLastCycle == 0) // Reset to 0 when write mode is enabled { uCycleDelta = 0; if (m_floppyLatch == 0xFF) { m_uSyncFFCount = 0; bIsSyncFF = true; } } else { uCycleDelta = (ULONG) (g_nCumulativeCycles - m_uWriteLastCycle); if (m_floppyLatch == 0xFF && uCycleDelta > 32) { m_uSyncFFCount++; bIsSyncFF = true; } } m_uWriteLastCycle = g_nCumulativeCycles; return bIsSyncFF; } #endif //=========================================================================== void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles) { /* m_floppyLoadMode = 0; */ FloppyDrive* pDrive = &m_floppyDrive[m_currDrive]; FloppyDisk* pFloppy = &pDrive->m_disk; if (!pFloppy->m_trackimagedata && pFloppy->m_imagehandle) ReadTrack(m_currDrive, uExecutedCycles); if (!pFloppy->m_trackimagedata) { m_floppyLatch = 0xFF; return; } // Improve precision of "authentic" drive mode - GH#125 UINT uSpinNibbleCount = 0; CpuCalcCycles(uExecutedCycles); // g_nCumulativeCycles required for uSpinNibbleCount & LogWriteCheckSyncFF() if (!m_enhanceDisk && pDrive->m_spinning) { const ULONG nCycleDiff = (ULONG) (g_nCumulativeCycles - m_diskLastCycle); m_diskLastCycle = g_nCumulativeCycles; if (nCycleDiff > 40) { // 40 cycles for a write of a 10-bit 0xFF sync byte uSpinNibbleCount = nCycleDiff >> 5; // ...but divide by 32 (not 40) ULONG uWrapOffset = uSpinNibbleCount % pFloppy->m_nibbles; pFloppy->m_byte += uWrapOffset; if (pFloppy->m_byte >= pFloppy->m_nibbles) pFloppy->m_byte -= pFloppy->m_nibbles; #if LOG_DISK_NIBBLES_SPIN UINT uCompleteRevolutions = uSpinNibbleCount / pFloppy->m_nibbles; LOG_DISK("spin: revs=%d, nibbles=%d\r\n", uCompleteRevolutions, uWrapOffset); #endif } } if (!m_floppyWriteMode) { // Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13) // "DRIVES OFF forces the data register to hold its present state." (UTAIIe page 9-12) // Note: Sherwood Forest sets shift mode and reads with the drive off. if (!pDrive->m_spinning) // GH#599 return; const ULONG nReadCycleDiff = (ULONG) (g_nCumulativeCycles - m_diskLastReadLatchCycle); // Support partial nibble read if disk reads are very close: (GH#582) // . 6 cycles (1st->2nd read) for DOS 3.3 / $BD34: "read with delays to see if disk is spinning." (Beneath Apple DOS) // . 6 cycles (1st->2nd read) for Curse of the Azure Bonds (loop to see if disk is spinning) // . 31 cycles is the max for a partial 8-bit nibble const ULONG kReadAccessThreshold = m_enhanceDisk ? 6 : 31; if (nReadCycleDiff <= kReadAccessThreshold) { UINT invalidBits = 8 - (nReadCycleDiff / 4); // 4 cycles per bit-cell m_floppyLatch = *(pFloppy->m_trackimage + pFloppy->m_byte) >> invalidBits; return; // Early return so don't update: m_diskLastReadLatchCycle & pFloppy->byte } m_floppyLatch = *(pFloppy->m_trackimage + pFloppy->m_byte); m_diskLastReadLatchCycle = g_nCumulativeCycles; #if LOG_DISK_NIBBLES_READ #if LOG_DISK_NIBBLES_USE_RUNTIME_VAR if (m_bLogDisk_NibblesRW) #endif { LOG_DISK("read %04X = %02X\r\n", pFloppy->m_byte, m_floppyLatch); } m_formatTrack.DecodeLatchNibbleRead(m_floppyLatch); #endif } else if (!pFloppy->m_bWriteProtected) // && m_floppyWriteMode { if (!pDrive->m_spinning) return; // If not spinning then only 1 bit-cell gets written? *(pFloppy->m_trackimage + pFloppy->m_byte) = m_floppyLatch; pFloppy->m_trackimagedirty = true; bool bIsSyncFF = false; #if LOG_DISK_NIBBLES_WRITE ULONG uCycleDelta = 0; bIsSyncFF = LogWriteCheckSyncFF(uCycleDelta); #endif m_formatTrack.DecodeLatchNibbleWrite(m_floppyLatch, uSpinNibbleCount, pFloppy, bIsSyncFF); // GH#125 #if LOG_DISK_NIBBLES_WRITE #if LOG_DISK_NIBBLES_USE_RUNTIME_VAR if (m_bLogDisk_NibblesRW) #endif { if (!bIsSyncFF) LOG_DISK("write %04X = %02X (cy=+%d)\r\n", pFloppy->m_byte, m_floppyLatch, uCycleDelta); else LOG_DISK("write %04X = %02X (cy=+%d) sync #%d\r\n", pFloppy->m_byte, m_floppyLatch, uCycleDelta, m_uSyncFFCount); } #endif } if (++pFloppy->m_byte >= pFloppy->m_nibbles) pFloppy->m_byte = 0; // Show track status (GH#201) - NB. Prevent flooding of forcing UI to redraw!!! if ((pFloppy->m_byte & 0xFF) == 0) FrameDrawDiskStatus( (HDC)0 ); } //=========================================================================== void Disk2InterfaceCard::ResetLogicStateSequencer(void) { m_shiftReg = 0; m_latchDelay = 0; m_resetSequencer = true; m_dbgLatchDelayedCnt = 0; } void Disk2InterfaceCard::UpdateBitStreamPositionAndDiskCycle(const ULONG uExecutedCycles) { FloppyDisk& floppy = m_floppyDrive[m_currDrive].m_disk; CpuCalcCycles(uExecutedCycles); const UINT bitCellDelta = GetBitCellDelta(ImageGetOptimalBitTiming(floppy.m_imagehandle)); UpdateBitStreamPosition(floppy, bitCellDelta); m_diskLastCycle = g_nCumulativeCycles; } UINT Disk2InterfaceCard::GetBitCellDelta(const BYTE optimalBitTiming) { FloppyDisk& floppy = m_floppyDrive[m_currDrive].m_disk; // NB. m_extraCycles is needed to retain accuracy: // . Read latch #1: 0-> 9: cycleDelta= 9, bitCellDelta=2, extraCycles=1 // . Read latch #2: 9->20: cycleDelta=11, bitCellDelta=2, extraCycles=3 // . Overall: 0->20: cycleDelta=20, bitCellDelta=5, extraCycles=0 UINT bitCellDelta; #if 0 if (optimalBitTiming == 32) { const ULONG cycleDelta = (ULONG)(g_nCumulativeCycles - m_diskLastCycle) + (BYTE) m_extraCycles; bitCellDelta = cycleDelta / 4; // DIV 4 for 4us per bit-cell m_extraCycles = cycleDelta & 3; // MOD 4 : remainder carried forward for next time } else #endif { const double cycleDelta = (double)(g_nCumulativeCycles - m_diskLastCycle) + floppy.m_extraCycles; const double bitTime = 0.125 * (double)optimalBitTiming; // 125ns units bitCellDelta = (UINT) floor( cycleDelta / bitTime ); floppy.m_extraCycles = (double)cycleDelta - ((double)bitCellDelta * bitTime); } return bitCellDelta; } void Disk2InterfaceCard::UpdateBitStreamPosition(FloppyDisk& floppy, const ULONG bitCellDelta) { _ASSERT(floppy.m_bitCount); // Should never happen - ReadTrack() will handle this if (floppy.m_bitCount == 0) return; floppy.m_bitOffset += bitCellDelta; if (floppy.m_bitOffset >= floppy.m_bitCount) floppy.m_bitOffset %= floppy.m_bitCount; UpdateBitStreamOffsets(floppy); } void Disk2InterfaceCard::UpdateBitStreamOffsets(FloppyDisk& floppy) { floppy.m_byte = floppy.m_bitOffset / 8; const UINT remainder = 7 - (floppy.m_bitOffset & 7); floppy.m_bitMask = 1 << remainder; } void __stdcall Disk2InterfaceCard::DataLatchReadWriteWOZ(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles) { /* m_floppyLoadMode = 0; */ FloppyDrive& drive = m_floppyDrive[m_currDrive]; FloppyDisk& floppy = drive.m_disk; if (!floppy.m_trackimagedata && floppy.m_imagehandle) ReadTrack(m_currDrive, uExecutedCycles); if (!floppy.m_trackimagedata) { _ASSERT(0); // Can't happen for WOZ - ReadTrack() should return an empty track m_floppyLatch = 0xFF; return; } // Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13) // "DRIVES OFF forces the data register to hold its present state." (UTAIIe page 9-12) // Note: Sherwood Forest sets shift mode and reads with the drive off. // TODO: And same for a write? if (!drive.m_spinning) // GH#599 return; CpuCalcCycles(uExecutedCycles); // Skipping forward a large amount of bitcells means the bitstream will very likely be out-of-sync. // The first 1-bit will produce a latch nibble, and this 1-bit is unlikely to be the nibble's high bit. // So we need to ensure we run enough bits through the sequencer to re-sync. // NB. For Planetfall 13 bitcells(NG) / 14 bitcells(OK) const UINT significantBitCells = 50; // 5x 10-bit sync FF nibbles UINT bitCellDelta = GetBitCellDelta(ImageGetOptimalBitTiming(floppy.m_imagehandle)); UINT bitCellRemainder; if (bitCellDelta <= significantBitCells) { bitCellRemainder = bitCellDelta; } else { bitCellRemainder = significantBitCells; bitCellDelta -= significantBitCells; UpdateBitStreamPosition(floppy, bitCellDelta); m_latchDelay = 0; } m_diskLastCycle = g_nCumulativeCycles; if (!bWrite) DataLatchReadWOZ(pc, addr, bitCellRemainder); else DataLatchWriteWOZ(pc, addr, d, bitCellRemainder); // Show track status (GH#201) - NB. Prevent flooding of forcing UI to redraw!!! if ((floppy.m_byte & 0xFF) == 0) FrameDrawDiskStatus((HDC)0); } void Disk2InterfaceCard::DataLatchReadWOZ(WORD pc, WORD addr, UINT bitCellRemainder) { // m_diskLastReadLatchCycle = g_nCumulativeCycles; // Not used by WOZ (only by NIB) #if LOG_DISK_NIBBLES_READ bool newLatchData = false; #endif FloppyDrive& drive = m_floppyDrive[m_currDrive]; FloppyDisk& floppy = drive.m_disk; #if _DEBUG static int dbgWOZ = 0; if (dbgWOZ) { DumpSectorWOZ(floppy); //DumpTrackWOZ(floppy); // Enable as necessary } #endif for (UINT i = 0; i < bitCellRemainder; i++) { BYTE n = floppy.m_trackimage[floppy.m_byte]; drive.m_headWindow <<= 1; drive.m_headWindow |= (n & floppy.m_bitMask) ? 1 : 0; BYTE outputBit = (drive.m_headWindow & 0xf) ? (drive.m_headWindow >> 1) & 1 : rand() & 1; floppy.m_bitMask >>= 1; if (!floppy.m_bitMask) { floppy.m_bitMask = 1 << 7; floppy.m_byte++; } floppy.m_bitOffset++; if (floppy.m_bitOffset == floppy.m_bitCount) { floppy.m_bitMask = 1 << 7; floppy.m_bitOffset = 0; floppy.m_byte = 0; } if (m_resetSequencer) { m_resetSequencer = false; // LSS takes some cycles to reset (ref?) continue; } // m_shiftReg <<= 1; m_shiftReg |= outputBit; if (m_latchDelay) { m_latchDelay -= 4; if (m_latchDelay < 0) m_latchDelay = 0; if (m_shiftReg) { m_dbgLatchDelayedCnt = 0; } else // m_shiftReg==0 { m_latchDelay += 4; // extend by 4us (so 7us again) - GH#662 m_dbgLatchDelayedCnt++; #if LOG_DISK_NIBBLES_READ if (m_dbgLatchDelayedCnt >= 3) { LOG_DISK("read: latch held due to 0: PC=%04X, cnt=%02X\r\n", regs.pc, m_dbgLatchDelayedCnt); } #endif } } if (!m_latchDelay) { #if LOG_DISK_NIBBLES_READ if (newLatchData) { LOG_DISK("read skipped latch data: %04X = %02X\r\n", floppy.m_byte, m_floppyLatch); newLatchData = false; } #endif m_floppyLatch = m_shiftReg; if (m_shiftReg & 0x80) { m_latchDelay = 7; m_shiftReg = 0; #if LOG_DISK_NIBBLES_READ // May not actually be read by 6502 (eg. Prologue's CHKSUM 4&4 nibble pair), but still pass to the log's nibble reader m_formatTrack.DecodeLatchNibbleRead(m_floppyLatch); newLatchData = true; #endif } } } #if LOG_DISK_NIBBLES_READ if (m_floppyLatch & 0x80) { #if LOG_DISK_NIBBLES_USE_RUNTIME_VAR if (m_bLogDisk_NibblesRW) #endif { LOG_DISK("read %04X = %02X\r\n", floppy.m_byte, m_floppyLatch); } } #endif } void Disk2InterfaceCard::DataLatchWriteWOZ(WORD pc, WORD addr, BYTE d, UINT bitCellRemainder) { _ASSERT(m_floppyWriteMode); FloppyDrive& drive = m_floppyDrive[m_currDrive]; FloppyDisk& floppy = drive.m_disk; if (!floppy.m_bWriteProtected) { //TODO } } //=========================================================================== #ifdef _DEBUG // Dump nibbles from current position until 0xDEAA (ie. data epilogue) void Disk2InterfaceCard::DumpSectorWOZ(FloppyDisk floppy) // pass a copy of m_floppy { BYTE shiftReg = 0; UINT32 lastNibbles = 0; UINT zeroCount = 0; UINT nibbleCount = 0; while (1) { BYTE n = floppy.m_trackimage[floppy.m_byte]; BYTE outputBit = (n & floppy.m_bitMask) ? 1 : 0; floppy.m_bitMask >>= 1; if (!floppy.m_bitMask) { floppy.m_bitMask = 1 << 7; floppy.m_byte++; } floppy.m_bitOffset++; if (floppy.m_bitOffset == floppy.m_bitCount) { floppy.m_bitMask = 1 << 7; floppy.m_bitOffset = 0; floppy.m_byte = 0; } if (shiftReg == 0 && outputBit == 0) { zeroCount++; continue; } shiftReg <<= 1; shiftReg |= outputBit; if ((shiftReg & 0x80) == 0) continue; nibbleCount++; char str[10]; sprintf(str, "%02X ", shiftReg); OutputDebugString(str); if ((nibbleCount & 0xf) == 0) OutputDebugString("\n"); lastNibbles <<= 8; lastNibbles |= shiftReg; if ((lastNibbles & 0xffff) == 0xDEAA) break; shiftReg = 0; zeroCount = 0; } } // Dump nibbles from current position bitstream wraps to same position void Disk2InterfaceCard::DumpTrackWOZ(FloppyDisk floppy) // pass a copy of m_floppy { #ifdef LOG_DISK_NIBBLES_READ FormatTrack formatTrack; #endif BYTE shiftReg = 0; UINT nibbleCount = 0; floppy.m_bitMask = 1 << 7; floppy.m_bitOffset = 0; floppy.m_byte = 0; const UINT startBitOffset = floppy.m_bitOffset; while (1) { BYTE n = floppy.m_trackimage[floppy.m_byte]; BYTE outputBit = (n & floppy.m_bitMask) ? 1 : 0; floppy.m_bitMask >>= 1; if (!floppy.m_bitMask) { floppy.m_bitMask = 1 << 7; floppy.m_byte++; } floppy.m_bitOffset++; if (floppy.m_bitOffset == floppy.m_bitCount) { floppy.m_bitMask = 1 << 7; floppy.m_bitOffset = 0; floppy.m_byte = 0; } if (startBitOffset == floppy.m_bitOffset) break; if (shiftReg == 0 && outputBit == 0) continue; shiftReg <<= 1; shiftReg |= outputBit; if ((shiftReg & 0x80) == 0) continue; nibbleCount++; TCHAR str[10]; StringCbPrintf(str, 10, "%02X ", shiftReg); OutputDebugString(str); if ((nibbleCount % 32) == 0) OutputDebugString("\n"); #ifdef LOG_DISK_NIBBLES_READ formatTrack.DecodeLatchNibbleRead(shiftReg); #endif shiftReg = 0; } } #endif //=========================================================================== void Disk2InterfaceCard::Reset(const bool bIsPowerCycle/*=false*/) { // RESET forces all switches off (UTAIIe Table 9.1) ResetSwitches(); m_formatTrack.Reset(); ResetLogicStateSequencer(); if (bIsPowerCycle) // GH#460 { // NB. This doesn't affect the drive head (ie. drive's track position) // . The initial machine start-up state is track=0, but after a power-cycle the track could be any value. // . (For DiskII firmware, this results in a subtle extra latch read in this latter case, for the track!=0 case) m_floppyDrive[DRIVE_1].m_spinning = 0; m_floppyDrive[DRIVE_1].m_writelight = 0; m_floppyDrive[DRIVE_2].m_spinning = 0; m_floppyDrive[DRIVE_2].m_writelight = 0; FrameRefreshStatus(DRAW_LEDS, false); } } void Disk2InterfaceCard::ResetSwitches(void) { m_currDrive = 0; m_floppyMotorOn = 0; m_floppyLoadMode = 0; m_floppyWriteMode = 0; m_magnetStates = 0; } //=========================================================================== bool Disk2InterfaceCard::UserSelectNewDiskImage(const int drive, LPCSTR pszFilename/*=""*/) { TCHAR directory[MAX_PATH]; TCHAR filename[MAX_PATH]; TCHAR title[40]; StringCbCopy(filename, MAX_PATH, pszFilename); RegLoadString(TEXT(REG_PREFS), REGVALUE_PREF_START_DIR, 1, directory, MAX_PATH, TEXT("")); StringCbPrintf(title, 40, TEXT("Select Disk Image For Drive %d"), drive + 1); _ASSERT(sizeof(OPENFILENAME) == sizeof(OPENFILENAME_NT4)); // Required for Win98/ME support (selected by _WIN32_WINNT=0x0400 in stdafx.h) OPENFILENAME ofn; ZeroMemory(&ofn,sizeof(OPENFILENAME)); ofn.lStructSize = sizeof(OPENFILENAME); ofn.hwndOwner = g_hFrameWindow; ofn.hInstance = g_hInstance; ofn.lpstrFilter = TEXT("All Images\0*.bin;*.do;*.dsk;*.nib;*.po;*.gz;*.woz;*.zip;*.2mg;*.2img;*.iie;*.apl\0") TEXT("Disk Images (*.bin,*.do,*.dsk,*.nib,*.po,*.gz,*.woz,*.zip,*.2mg,*.2img,*.iie)\0*.bin;*.do;*.dsk;*.nib;*.po;*.gz;*.woz;*.zip;*.2mg;*.2img;*.iie\0") TEXT("All Files\0*.*\0"); ofn.lpstrFile = filename; ofn.nMaxFile = MAX_PATH; ofn.lpstrInitialDir = directory; ofn.Flags = OFN_PATHMUSTEXIST; ofn.lpstrTitle = title; bool bRes = false; if (GetOpenFileName(&ofn)) { if ((!ofn.nFileExtension) || !filename[ofn.nFileExtension]) StringCbCat(filename, MAX_PATH, TEXT(".dsk")); ImageError_e Error = InsertDisk(drive, filename, ofn.Flags & OFN_READONLY, IMAGE_CREATE); if (Error == eIMAGE_ERROR_NONE) { bRes = true; } else { NotifyInvalidImage(drive, filename, Error); } } return bRes; } //=========================================================================== void __stdcall Disk2InterfaceCard::LoadWriteProtect(WORD, WORD, BYTE write, BYTE value, ULONG uExecutedCycles) { /* m_floppyLoadMode = 1; */ // Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13) // "DRIVES OFF forces the data register to hold its present state." (UTAIIe page 9-12) // Note: Gemstone Warrior sets load mode with the drive off. if (!m_floppyDrive[m_currDrive].m_spinning) // GH#599 return; if (!write) { // Notes: // . Phase 1 on also forces write protect in the Disk II drive (UTAIIe page 9-7) but we don't implement that // . write mode doesn't prevent reading write protect (GH#537): // "If for some reason the above write protect check were entered with the READ/WRITE switch in WRITE, // the write protect switch would still be read correctly" (UTAIIe page 9-21) // . Sequencer "SR" (Shift Right) command only loads QA (bit7) of data register (UTAIIe page 9-21) if (m_floppyDrive[m_currDrive].m_disk.m_bWriteProtected) m_floppyLatch |= 0x80; else m_floppyLatch &= 0x7F; } if (ImageIsWOZ(m_floppyDrive[m_currDrive].m_disk.m_imagehandle)) { #if LOG_DISK_NIBBLES_READ LOG_DISK("reset LSS: ~PC=%04X\r\n", regs.pc); #endif ResetLogicStateSequencer(); // reset sequencer (Ref: WOZ-1.01) // m_latchDelay = 7; // TODO: Treat like a regular $C0EC latch load? UpdateBitStreamPositionAndDiskCycle(uExecutedCycles); // Fix E7-copy protection } } //=========================================================================== void __stdcall Disk2InterfaceCard::SetReadMode(WORD, WORD, BYTE, BYTE, ULONG) { m_floppyWriteMode = 0; m_formatTrack.DriveSwitchedToReadMode(&m_floppyDrive[m_currDrive].m_disk); #if LOG_DISK_RW_MODE LOG_DISK("rw mode: read\r\n"); #endif } //=========================================================================== void __stdcall Disk2InterfaceCard::SetWriteMode(WORD, WORD, BYTE, BYTE, ULONG uExecutedCycles) { m_floppyWriteMode = 1; m_formatTrack.DriveSwitchedToWriteMode(m_floppyDrive[m_currDrive].m_disk.m_byte); BOOL modechange = !m_floppyDrive[m_currDrive].m_writelight; #if LOG_DISK_RW_MODE LOG_DISK("rw mode: write (mode changed=%d)\r\n", modechange ? 1 : 0); #endif #if LOG_DISK_NIBBLES_WRITE m_uWriteLastCycle = 0; #endif m_floppyDrive[m_currDrive].m_writelight = WRITELIGHT_CYCLES; if (modechange) FrameDrawDiskLEDS( (HDC)0 ); } //=========================================================================== void Disk2InterfaceCard::UpdateDriveState(DWORD cycles) { int loop = NUM_DRIVES; while (loop--) { FloppyDrive* pDrive = &m_floppyDrive[loop]; if (pDrive->m_spinning && !m_floppyMotorOn) { if (!(pDrive->m_spinning -= MIN(pDrive->m_spinning, cycles))) { FrameDrawDiskLEDS( (HDC)0 ); FrameDrawDiskStatus( (HDC)0 ); } } if (m_floppyWriteMode && (m_currDrive == loop) && pDrive->m_spinning) { pDrive->m_writelight = WRITELIGHT_CYCLES; } else if (pDrive->m_writelight) { if (!(pDrive->m_writelight -= MIN(pDrive->m_writelight, cycles))) { FrameDrawDiskLEDS( (HDC)0 ); FrameDrawDiskStatus( (HDC)0 ); } } } } //=========================================================================== bool Disk2InterfaceCard::DriveSwap(void) { // Refuse to swap if either Disk][ is active // TODO: if Shift-Click then FORCE drive swap to bypass message if (m_floppyDrive[DRIVE_1].m_spinning || m_floppyDrive[DRIVE_2].m_spinning) { // 1.26.2.4 Prompt when trying to swap disks while drive is on instead of silently failing int status = MessageBox( g_hFrameWindow, "WARNING:\n" "\n" "\tAttempting to swap a disk while a drive is on\n" "\t\t--> is NOT recommended <--\n" "\tas this will most likely read/write incorrect data!\n" "\n" "If the other drive is empty then swapping is harmless. The" " computer will appear to 'hang' trying to read non-existent data but" " you can safely swap disks once more to restore the original disk.\n" "\n" "Do you still wish to swap disks?", "Trying to swap a disk while a drive is on ...", MB_ICONWARNING | MB_YESNOCANCEL ); switch( status ) { case IDNO: case IDCANCEL: return false; default: break; // User is OK with swapping disks so let them proceed at their own risk } } FlushCurrentTrack(DRIVE_1); FlushCurrentTrack(DRIVE_2); // Swap disks between drives // . NB. We swap trackimage ptrs (so don't need to swap the buffers' data) std::swap(m_floppyDrive[DRIVE_1].m_disk, m_floppyDrive[DRIVE_2].m_disk); // Invalidate the trackimage so that a read latch will re-read the track for the new floppy (GH#543) m_floppyDrive[DRIVE_1].m_disk.m_trackimagedata = false; m_floppyDrive[DRIVE_2].m_disk.m_trackimagedata = false; SaveLastDiskImage(DRIVE_1); SaveLastDiskImage(DRIVE_2); FrameRefreshStatus(DRAW_LEDS | DRAW_BUTTON_DRIVES, false); return true; } //=========================================================================== // TODO: LoadRom_Disk_Floppy() void Disk2InterfaceCard::Initialize(LPBYTE pCxRomPeripheral, UINT uSlot) { const UINT DISK2_FW_SIZE = APPLE_SLOT_SIZE; HRSRC hResInfo = FindResource(NULL, MAKEINTRESOURCE(IDR_DISK2_FW), "FIRMWARE"); if(hResInfo == NULL) return; DWORD dwResSize = SizeofResource(NULL, hResInfo); if(dwResSize != DISK2_FW_SIZE) return; HGLOBAL hResData = LoadResource(NULL, hResInfo); if(hResData == NULL) return; BYTE* pData = (BYTE*) LockResource(hResData); // NB. Don't need to unlock resource if(pData == NULL) return; memcpy(pCxRomPeripheral + uSlot*APPLE_SLOT_SIZE, pData, DISK2_FW_SIZE); // Note: We used to disable the track stepping delay in the Disk II controller firmware by // patching $C64C with $A9,$00,$EA. Now not doing this since: // . Authentic Speed should be authentic // . Enhanced Speed runs emulation unthrottled, so removing the delay has negligible effect // . Patching the firmware breaks the ADC checksum used by "The CIA Files" (Tricky Dick) // . In this case we can patch to compensate for an ADC or EOR checksum but not both (nickw) RegisterIoHandler(uSlot, &Disk2InterfaceCard::IORead, &Disk2InterfaceCard::IOWrite, NULL, NULL, this, NULL); m_slot = uSlot; } //=========================================================================== BYTE __stdcall Disk2InterfaceCard::IORead(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles) { UINT uSlot = ((addr & 0xff) >> 4) - 8; Disk2InterfaceCard* pCard = (Disk2InterfaceCard*) MemGetSlotParameters(uSlot); ImageInfo* pImage = pCard->m_floppyDrive[pCard->m_currDrive].m_disk.m_imagehandle; bool isWOZ = ImageIsWOZ(pImage); switch (addr & 0xF) { case 0x0: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x1: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x2: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x3: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x4: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x5: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x6: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x7: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x8: pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break; case 0x9: pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break; case 0xA: pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break; case 0xB: pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break; case 0xC: if (!isWOZ) pCard->ReadWrite(pc, addr, bWrite, d, nExecutedCycles); break; case 0xD: pCard->LoadWriteProtect(pc, addr, bWrite, d, nExecutedCycles); break; case 0xE: pCard->SetReadMode(pc, addr, bWrite, d, nExecutedCycles); break; case 0xF: pCard->SetWriteMode(pc, addr, bWrite, d, nExecutedCycles); break; } // only even addresses return the latch (UTAIIe Table 9.1) if (!(addr & 1)) { if (isWOZ) pCard->DataLatchReadWriteWOZ(pc, addr, bWrite, d, nExecutedCycles); return pCard->m_floppyLatch; } return MemReadFloatingBus(nExecutedCycles); } BYTE __stdcall Disk2InterfaceCard::IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles) { UINT uSlot = ((addr & 0xff) >> 4) - 8; Disk2InterfaceCard* pCard = (Disk2InterfaceCard*) MemGetSlotParameters(uSlot); ImageInfo* pImage = pCard->m_floppyDrive[pCard->m_currDrive].m_disk.m_imagehandle; bool isWOZ = ImageIsWOZ(pImage); switch (addr & 0xF) { case 0x0: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x1: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x2: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x3: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x4: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x5: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x6: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x7: pCard->ControlStepper(pc, addr, bWrite, d, nExecutedCycles); break; case 0x8: pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break; case 0x9: pCard->ControlMotor(pc, addr, bWrite, d, nExecutedCycles); break; case 0xA: pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break; case 0xB: pCard->Enable(pc, addr, bWrite, d, nExecutedCycles); break; case 0xC: if (!isWOZ) pCard->ReadWrite(pc, addr, bWrite, d, nExecutedCycles); break; case 0xD: pCard->LoadWriteProtect(pc, addr, bWrite, d, nExecutedCycles); break; case 0xE: pCard->SetReadMode(pc, addr, bWrite, d, nExecutedCycles); break; case 0xF: pCard->SetWriteMode(pc, addr, bWrite, d, nExecutedCycles); break; } // any address writes the latch via sequencer LD command (74LS323 datasheet) if (pCard->m_floppyWriteMode /* && m_floppyLoadMode */) { pCard->m_floppyLatch = d; if (isWOZ) pCard->DataLatchReadWriteWOZ(pc, addr, bWrite, d, nExecutedCycles); } return 0; } //=========================================================================== // Unit version history: // 2: Added: Format Track state & DiskLastCycle // 3: Added: DiskLastReadLatchCycle // 4: Added: WOZ state // Split up 'Unit' putting some state into a new 'Floppy' static const UINT kUNIT_VERSION = 4; #define SS_YAML_VALUE_CARD_DISK2 "Disk][" #define SS_YAML_KEY_PHASES "Phases" #define SS_YAML_KEY_CURRENT_DRIVE "Current Drive" #define SS_YAML_KEY_DISK_ACCESSED "Disk Accessed" #define SS_YAML_KEY_ENHANCE_DISK "Enhance Disk" #define SS_YAML_KEY_FLOPPY_LATCH "Floppy Latch" #define SS_YAML_KEY_FLOPPY_MOTOR_ON "Floppy Motor On" #define SS_YAML_KEY_FLOPPY_WRITE_MODE "Floppy Write Mode" #define SS_YAML_KEY_LAST_CYCLE "Last Cycle" #define SS_YAML_KEY_LAST_READ_LATCH_CYCLE "Last Read Latch Cycle" #define SS_YAML_KEY_LSS_SHIFT_REG "LSS Shift Reg" #define SS_YAML_KEY_LSS_LATCH_DELAY "LSS Latch Delay" #define SS_YAML_KEY_LSS_RESET_SEQUENCER "LSS Reset Sequencer" #define SS_YAML_KEY_DISK2UNIT "Unit" #define SS_YAML_KEY_FILENAME "Filename" #define SS_YAML_KEY_PHASE "Phase" #define SS_YAML_KEY_PHASE_PRECISE "Phase (precise)" #define SS_YAML_KEY_TRACK "Track" // deprecated at v4 #define SS_YAML_KEY_HEAD_WINDOW "Head Window" #define SS_YAML_KEY_LAST_STEPPER_CYCLE "Last Stepper Cycle" #define SS_YAML_KEY_FLOPPY "Floppy" #define SS_YAML_KEY_BYTE "Byte" #define SS_YAML_KEY_NIBBLES "Nibbles" #define SS_YAML_KEY_BIT_OFFSET "Bit Offset" #define SS_YAML_KEY_BIT_COUNT "Bit Count" #define SS_YAML_KEY_EXTRA_CYCLES "Extra Cycles" #define SS_YAML_KEY_WRITE_PROTECTED "Write Protected" #define SS_YAML_KEY_SPINNING "Spinning" #define SS_YAML_KEY_WRITE_LIGHT "Write Light" #define SS_YAML_KEY_TRACK_IMAGE_DATA "Track Image Data" #define SS_YAML_KEY_TRACK_IMAGE_DIRTY "Track Image Dirty" #define SS_YAML_KEY_TRACK_IMAGE "Track Image" std::string Disk2InterfaceCard::GetSnapshotCardName(void) { static const std::string name(SS_YAML_VALUE_CARD_DISK2); return name; } void Disk2InterfaceCard::SaveSnapshotFloppy(YamlSaveHelper& yamlSaveHelper, UINT unit) { YamlSaveHelper::Label label(yamlSaveHelper, "%s:\n", SS_YAML_KEY_FLOPPY); yamlSaveHelper.SaveString(SS_YAML_KEY_FILENAME, m_floppyDrive[unit].m_disk.m_fullname); yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_BYTE, m_floppyDrive[unit].m_disk.m_byte); yamlSaveHelper.SaveHexUint16(SS_YAML_KEY_NIBBLES, m_floppyDrive[unit].m_disk.m_nibbles); yamlSaveHelper.SaveHexUint32(SS_YAML_KEY_BIT_OFFSET, m_floppyDrive[unit].m_disk.m_bitOffset); // v4 yamlSaveHelper.SaveHexUint32(SS_YAML_KEY_BIT_COUNT, m_floppyDrive[unit].m_disk.m_bitCount); // v4 yamlSaveHelper.SaveDouble(SS_YAML_KEY_EXTRA_CYCLES, m_floppyDrive[unit].m_disk.m_extraCycles); // v4 yamlSaveHelper.SaveBool(SS_YAML_KEY_WRITE_PROTECTED, m_floppyDrive[unit].m_disk.m_bWriteProtected); yamlSaveHelper.SaveUint(SS_YAML_KEY_TRACK_IMAGE_DATA, m_floppyDrive[unit].m_disk.m_trackimagedata); yamlSaveHelper.SaveUint(SS_YAML_KEY_TRACK_IMAGE_DIRTY, m_floppyDrive[unit].m_disk.m_trackimagedirty); if (m_floppyDrive[unit].m_disk.m_trackimage) { YamlSaveHelper::Label image(yamlSaveHelper, "%s:\n", SS_YAML_KEY_TRACK_IMAGE); yamlSaveHelper.SaveMemory(m_floppyDrive[unit].m_disk.m_trackimage, NIBBLES_PER_TRACK); } } void Disk2InterfaceCard::SaveSnapshotDriveUnit(YamlSaveHelper& yamlSaveHelper, UINT unit) { YamlSaveHelper::Label label(yamlSaveHelper, "%s%d:\n", SS_YAML_KEY_DISK2UNIT, unit); yamlSaveHelper.SaveUint(SS_YAML_KEY_PHASE, m_floppyDrive[unit].m_phase); yamlSaveHelper.SaveFloat(SS_YAML_KEY_PHASE_PRECISE, m_floppyDrive[unit].m_phasePrecise); // v4 yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_HEAD_WINDOW, m_floppyDrive[unit].m_headWindow); // v4 yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_STEPPER_CYCLE, m_floppyDrive[unit].m_lastStepperCycle); // v4 yamlSaveHelper.SaveUint(SS_YAML_KEY_SPINNING, m_floppyDrive[unit].m_spinning); yamlSaveHelper.SaveUint(SS_YAML_KEY_WRITE_LIGHT, m_floppyDrive[unit].m_writelight); SaveSnapshotFloppy(yamlSaveHelper, unit); } void Disk2InterfaceCard::SaveSnapshot(class YamlSaveHelper& yamlSaveHelper) { YamlSaveHelper::Slot slot(yamlSaveHelper, GetSnapshotCardName(), m_slot, kUNIT_VERSION); YamlSaveHelper::Label state(yamlSaveHelper, "%s:\n", SS_YAML_KEY_STATE); yamlSaveHelper.SaveUint(SS_YAML_KEY_CURRENT_DRIVE, m_currDrive); yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_PHASES, m_magnetStates); yamlSaveHelper.SaveBool(SS_YAML_KEY_DISK_ACCESSED, false); // deprecated yamlSaveHelper.SaveBool(SS_YAML_KEY_ENHANCE_DISK, m_enhanceDisk); yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_FLOPPY_LATCH, m_floppyLatch); yamlSaveHelper.SaveBool(SS_YAML_KEY_FLOPPY_MOTOR_ON, m_floppyMotorOn == TRUE); yamlSaveHelper.SaveBool(SS_YAML_KEY_FLOPPY_WRITE_MODE, m_floppyWriteMode == TRUE); yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_CYCLE, m_diskLastCycle); // v2 yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_READ_LATCH_CYCLE, m_diskLastReadLatchCycle); // v3 yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_LSS_SHIFT_REG, m_shiftReg); // v4 yamlSaveHelper.SaveInt(SS_YAML_KEY_LSS_LATCH_DELAY, m_latchDelay); // v4 yamlSaveHelper.SaveBool(SS_YAML_KEY_LSS_RESET_SEQUENCER, m_resetSequencer); // v4 m_formatTrack.SaveSnapshot(yamlSaveHelper); // v2 SaveSnapshotDriveUnit(yamlSaveHelper, DRIVE_1); SaveSnapshotDriveUnit(yamlSaveHelper, DRIVE_2); } bool Disk2InterfaceCard::LoadSnapshotFloppy(YamlLoadHelper& yamlLoadHelper, UINT unit, UINT version, std::vector& track) { std::string filename = yamlLoadHelper.LoadString(SS_YAML_KEY_FILENAME); bool bImageError = filename.empty(); if (!bImageError) { DWORD dwAttributes = GetFileAttributes(filename.c_str()); if (dwAttributes == INVALID_FILE_ATTRIBUTES) { // Get user to browse for file UserSelectNewDiskImage(unit, filename.c_str()); dwAttributes = GetFileAttributes(filename.c_str()); } bImageError = (dwAttributes == INVALID_FILE_ATTRIBUTES); if (!bImageError) { if (InsertDisk(unit, filename.c_str(), dwAttributes & FILE_ATTRIBUTE_READONLY, IMAGE_DONT_CREATE) != eIMAGE_ERROR_NONE) bImageError = true; // DiskInsert() zeros m_floppyDrive[unit], then sets up: // . m_imagename // . m_fullname // . m_bWriteProtected } } yamlLoadHelper.LoadBool(SS_YAML_KEY_WRITE_PROTECTED); // Consume m_floppyDrive[unit].m_disk.m_byte = yamlLoadHelper.LoadUint(SS_YAML_KEY_BYTE); m_floppyDrive[unit].m_disk.m_nibbles = yamlLoadHelper.LoadUint(SS_YAML_KEY_NIBBLES); m_floppyDrive[unit].m_disk.m_trackimagedata = yamlLoadHelper.LoadUint(SS_YAML_KEY_TRACK_IMAGE_DATA) ? true : false; m_floppyDrive[unit].m_disk.m_trackimagedirty = yamlLoadHelper.LoadUint(SS_YAML_KEY_TRACK_IMAGE_DIRTY) ? true : false; if (version >= 4) { m_floppyDrive[unit].m_disk.m_bitOffset = yamlLoadHelper.LoadUint(SS_YAML_KEY_BIT_OFFSET); m_floppyDrive[unit].m_disk.m_bitCount = yamlLoadHelper.LoadUint(SS_YAML_KEY_BIT_COUNT); m_floppyDrive[unit].m_disk.m_extraCycles = yamlLoadHelper.LoadDouble(SS_YAML_KEY_EXTRA_CYCLES); if (m_floppyDrive[unit].m_disk.m_bitCount && (m_floppyDrive[unit].m_disk.m_bitOffset >= m_floppyDrive[unit].m_disk.m_bitCount)) throw std::string("Disk image: bitOffset >= bitCount"); if (ImageIsWOZ(m_floppyDrive[unit].m_disk.m_imagehandle)) UpdateBitStreamOffsets(m_floppyDrive[unit].m_disk); // overwrites m_byte, inits m_bitMask } if (yamlLoadHelper.GetSubMap(SS_YAML_KEY_TRACK_IMAGE)) { yamlLoadHelper.LoadMemory(&track[0], NIBBLES_PER_TRACK); yamlLoadHelper.PopMap(); } return bImageError; } bool Disk2InterfaceCard::LoadSnapshotDriveUnitv3(YamlLoadHelper& yamlLoadHelper, UINT unit, UINT version, std::vector& track) { _ASSERT(version <= 3); std::string disk2UnitName = std::string(SS_YAML_KEY_DISK2UNIT) + (unit == DRIVE_1 ? std::string("0") : std::string("1")); if (!yamlLoadHelper.GetSubMap(disk2UnitName)) throw std::string("Card: Expected key: ") + disk2UnitName; bool bImageError = LoadSnapshotFloppy(yamlLoadHelper, unit, version, track); yamlLoadHelper.LoadUint(SS_YAML_KEY_TRACK); // consume m_floppyDrive[unit].m_phase = yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASE); m_floppyDrive[unit].m_phasePrecise = (float) m_floppyDrive[unit].m_phase; m_floppyDrive[unit].m_spinning = yamlLoadHelper.LoadUint(SS_YAML_KEY_SPINNING); m_floppyDrive[unit].m_writelight = yamlLoadHelper.LoadUint(SS_YAML_KEY_WRITE_LIGHT); yamlLoadHelper.PopMap(); return bImageError; } bool Disk2InterfaceCard::LoadSnapshotDriveUnitv4(YamlLoadHelper& yamlLoadHelper, UINT unit, UINT version, std::vector& track) { _ASSERT(version >= 4); std::string disk2UnitName = std::string(SS_YAML_KEY_DISK2UNIT) + (unit == DRIVE_1 ? std::string("0") : std::string("1")); if (!yamlLoadHelper.GetSubMap(disk2UnitName)) throw std::string("Card: Expected key: ") + disk2UnitName; if (!yamlLoadHelper.GetSubMap(SS_YAML_KEY_FLOPPY)) throw std::string("Card: Expected key: ") + SS_YAML_KEY_FLOPPY; bool bImageError = LoadSnapshotFloppy(yamlLoadHelper, unit, version, track); yamlLoadHelper.PopMap(); // m_floppyDrive[unit].m_phase = yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASE); m_floppyDrive[unit].m_phasePrecise = yamlLoadHelper.LoadFloat(SS_YAML_KEY_PHASE_PRECISE); m_floppyDrive[unit].m_headWindow = yamlLoadHelper.LoadUint(SS_YAML_KEY_HEAD_WINDOW) & 0xf; m_floppyDrive[unit].m_lastStepperCycle = yamlLoadHelper.LoadUint64(SS_YAML_KEY_LAST_STEPPER_CYCLE); m_floppyDrive[unit].m_spinning = yamlLoadHelper.LoadUint(SS_YAML_KEY_SPINNING); m_floppyDrive[unit].m_writelight = yamlLoadHelper.LoadUint(SS_YAML_KEY_WRITE_LIGHT); yamlLoadHelper.PopMap(); return bImageError; } void Disk2InterfaceCard::LoadSnapshotDriveUnit(YamlLoadHelper& yamlLoadHelper, UINT unit, UINT version) { bool bImageError = false; std::vector track(NIBBLES_PER_TRACK); if (version <= 3) bImageError = LoadSnapshotDriveUnitv3(yamlLoadHelper, unit, version, track); else bImageError = LoadSnapshotDriveUnitv4(yamlLoadHelper, unit, version, track); if (!bImageError) { if ((m_floppyDrive[unit].m_disk.m_trackimage == NULL) && m_floppyDrive[unit].m_disk.m_nibbles) AllocTrack(unit); if (m_floppyDrive[unit].m_disk.m_trackimage == NULL) bImageError = true; else memcpy(m_floppyDrive[unit].m_disk.m_trackimage, &track[0], NIBBLES_PER_TRACK); } if (bImageError) { m_floppyDrive[unit].m_disk.m_trackimagedata = false; m_floppyDrive[unit].m_disk.m_trackimagedirty = false; m_floppyDrive[unit].m_disk.m_nibbles = 0; } } bool Disk2InterfaceCard::LoadSnapshot(class YamlLoadHelper& yamlLoadHelper, UINT slot, UINT version) { if (slot != 6) // fixme throw std::string("Card: wrong slot"); if (version < 1 || version > kUNIT_VERSION) throw std::string("Card: wrong version"); m_currDrive = yamlLoadHelper.LoadUint(SS_YAML_KEY_CURRENT_DRIVE); m_magnetStates = yamlLoadHelper.LoadUint(SS_YAML_KEY_PHASES); (void) yamlLoadHelper.LoadBool(SS_YAML_KEY_DISK_ACCESSED); // deprecated - but retrieve the value to avoid the "State: Unknown key (Disk Accessed)" warning m_enhanceDisk = yamlLoadHelper.LoadBool(SS_YAML_KEY_ENHANCE_DISK); m_floppyLatch = yamlLoadHelper.LoadUint(SS_YAML_KEY_FLOPPY_LATCH); m_floppyMotorOn = yamlLoadHelper.LoadBool(SS_YAML_KEY_FLOPPY_MOTOR_ON); m_floppyWriteMode = yamlLoadHelper.LoadBool(SS_YAML_KEY_FLOPPY_WRITE_MODE); if (version >= 2) { m_diskLastCycle = yamlLoadHelper.LoadUint64(SS_YAML_KEY_LAST_CYCLE); m_formatTrack.LoadSnapshot(yamlLoadHelper); } if (version >= 3) { m_diskLastReadLatchCycle = yamlLoadHelper.LoadUint64(SS_YAML_KEY_LAST_READ_LATCH_CYCLE); } if (version >= 4) { m_shiftReg = yamlLoadHelper.LoadUint(SS_YAML_KEY_LSS_SHIFT_REG) & 0xff; m_latchDelay = yamlLoadHelper.LoadInt(SS_YAML_KEY_LSS_LATCH_DELAY); m_resetSequencer = yamlLoadHelper.LoadBool(SS_YAML_KEY_LSS_RESET_SEQUENCER); } // Eject all disks first in case Drive-2 contains disk to be inserted into Drive-1 for (UINT i=0; i