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AppleWin/source/Disk.cpp

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/*
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) 2006-2007, Tom Charlesworth, Michael Pohoreski
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
*/
#include "StdAfx.h"
#include "DiskImage.h"
#include "CPU.h"
#include "..\resource\resource.h"
#define LOG_DISK_ENABLED 0
// __VA_ARGS__ not supported on MSVC++ .NET 7.x
#if (LOG_DISK_ENABLED)
#if !defined(_VC71)
#define LOG_DISK(format, ...) LOG(format, __VA_ARGS__)
#else
#define LOG_DISK LogOutput
#endif
#else
#if !defined(_VC71)
#define LOG_DISK(...)
#else
#define LOG_DISK(x)
#endif
#endif
// Public _________________________________________________________________________________________
BOOL enhancedisk = 1; // TODO: Make static & add accessor funcs
// Private ________________________________________________________________________________________
const int MAX_DISK_IMAGE_NAME = 15;
const int MAX_DISK_FULL_NAME = 127;
struct Disk_t
{
TCHAR imagename[ MAX_DISK_IMAGE_NAME + 1 ]; // <FILENAME> (ie. no extension)
TCHAR fullname [ MAX_DISK_FULL_NAME + 1 ]; // <FILENAME.EXT> or <FILENAME.zip> : This is persisted to the snapshot file
string strDiskPathFilename;
string strFilenameInZip; // 0x00 or <FILENAME.EXT>
HIMAGE imagehandle; // Init'd by DiskInsert() -> ImageOpen()
int track;
LPBYTE trackimage;
int phase;
int byte;
bool bWriteProtected;
BOOL trackimagedata;
BOOL trackimagedirty;
DWORD spinning;
DWORD writelight;
int nibbles; // Init'd by ReadTrack() -> ImageReadTrack()
const Disk_t& operator= (const Disk_t& other)
{
memcpy(imagename, other.imagename, sizeof(imagename));
memcpy(fullname , other.fullname, sizeof(fullname));
strDiskPathFilename = other.strDiskPathFilename;
strFilenameInZip = other.strFilenameInZip;
imagehandle = other.imagehandle;
track = other.track;
trackimage = other.trackimage;
phase = other.phase;
byte = other.byte;
bWriteProtected = other.bWriteProtected;
trackimagedata = other.trackimagedata;
trackimagedirty = other.trackimagedirty;
spinning = other.spinning;
writelight = other.writelight;
nibbles = other.nibbles;
return *this;
}
};
static WORD currdrive = 0;
static BOOL diskaccessed = 0;
static Disk_t g_aFloppyDisk[NUM_DRIVES];
static BYTE floppylatch = 0;
static BOOL floppymotoron = 0;
static BOOL floppywritemode = 0;
static WORD phases; // state bits for stepper magnet phases 0 - 3
static bool g_bSaveDiskImage = true; // Save the DiskImage name to Registry
static DWORD nCyclesLastStep = 0;
static void CheckSpinning();
static Disk_Status_e GetDriveLightStatus( const int iDrive );
static bool IsDriveValid( const int iDrive );
static void ReadTrack (int drive);
static void RemoveDisk (int drive);
static void WriteTrack (int drive);
//===========================================================================
int DiskGetCurrentDrive(void) { return currdrive; }
int DiskGetCurrentTrack(void) { return g_aFloppyDisk[currdrive].track; }
int DiskGetCurrentPhase(void) { return g_aFloppyDisk[currdrive].phase; }
int DiskGetCurrentOffset(void) { return g_aFloppyDisk[currdrive].byte; }
const string& DiskGetDiskPathFilename(const int iDrive)
{
return g_aFloppyDisk[iDrive].strDiskPathFilename;
}
static void DiskSetDiskPathFilename(const int iDrive, const string strPathName)
{
g_aFloppyDisk[iDrive].strDiskPathFilename = strPathName;
}
char* DiskGetCurrentState(void)
{
if (g_aFloppyDisk[currdrive].imagehandle == NULL)
return "Empty";
if (!floppymotoron)
{
if (g_aFloppyDisk[currdrive].spinning > 0)
return "Off (spinning)";
else
return "Off";
}
else if (floppywritemode)
{
if (g_aFloppyDisk[currdrive].bWriteProtected)
return "Writing";
else
return "Writing (write protected)";
}
else
{
return "Reading";
}
}
//===========================================================================
void Disk_LoadLastDiskImage(const int iDrive)
{
_ASSERT(iDrive == DRIVE_1 || iDrive == DRIVE_2);
char sFilePath[ MAX_PATH + 1];
sFilePath[0] = 0;
char *pRegKey = (iDrive == DRIVE_1)
? REGVALUE_PREF_LAST_DISK_1
: REGVALUE_PREF_LAST_DISK_2;
if (RegLoadString(TEXT(REG_PREFS),pRegKey,1,sFilePath,MAX_PATH))
{
sFilePath[ MAX_PATH ] = 0;
DiskSetDiskPathFilename(iDrive, sFilePath);
#if _DEBUG
// MessageBox(g_hFrameWindow,pFileName,pRegKey,MB_OK);
#endif
// _tcscat(imagefilename,TEXT("MASTER.DSK")); // TODO: Should remember last disk by user
g_bSaveDiskImage = false;
// Pass in ptr to local copy of filepath, since RemoveDisk() sets DiskPathFilename = ""
DiskInsert(iDrive, sFilePath, IMAGE_USE_FILES_WRITE_PROTECT_STATUS, IMAGE_DONT_CREATE);
g_bSaveDiskImage = true;
}
//else MessageBox(g_hFrameWindow,"Reg Key/Value not found",pRegKey,MB_OK);
}
//===========================================================================
void Disk_SaveLastDiskImage(const int iDrive)
{
_ASSERT(iDrive == DRIVE_1 || iDrive == DRIVE_2);
if (!g_bSaveDiskImage)
return;
const char *pFileName = DiskGetDiskPathFilename(iDrive).c_str();
if (iDrive == DRIVE_1)
RegSaveString(TEXT(REG_PREFS), REGVALUE_PREF_LAST_DISK_1, TRUE, pFileName);
else
RegSaveString(TEXT(REG_PREFS), REGVALUE_PREF_LAST_DISK_2, TRUE, pFileName);
}
//===========================================================================
static void CheckSpinning(void)
{
DWORD modechange = (floppymotoron && !g_aFloppyDisk[currdrive].spinning);
if (floppymotoron)
g_aFloppyDisk[currdrive].spinning = 20000;
if (modechange)
FrameRefreshStatus(DRAW_LEDS);
}
//===========================================================================
static Disk_Status_e GetDriveLightStatus(const int iDrive)
{
if (IsDriveValid( iDrive ))
{
Disk_t *pFloppy = & g_aFloppyDisk[ iDrive ];
if (pFloppy->spinning)
{
if (pFloppy->bWriteProtected)
return DISK_STATUS_PROT;
if (pFloppy->writelight)
return DISK_STATUS_WRITE;
else
return DISK_STATUS_READ;
}
else
return DISK_STATUS_OFF;
}
return DISK_STATUS_OFF;
}
//===========================================================================
static void GetImageTitle(LPCTSTR imagefilename, Disk_t* fptr)
{
TCHAR imagetitle[ MAX_DISK_FULL_NAME+1 ];
LPCTSTR startpos = imagefilename;
// imagetitle = <FILENAME.EXT>
if (_tcsrchr(startpos,TEXT('\\')))
startpos = _tcsrchr(startpos,TEXT('\\'))+1;
_tcsncpy(imagetitle,startpos,MAX_DISK_FULL_NAME);
imagetitle[MAX_DISK_FULL_NAME] = 0;
// if imagetitle contains a lowercase char, then found=1 (why?)
BOOL found = 0;
int loop = 0;
while (imagetitle[loop] && !found)
{
if (IsCharLower(imagetitle[loop]))
found = 1;
else
loop++;
}
if ((!found) && (loop > 2))
CharLowerBuff(imagetitle+1,_tcslen(imagetitle+1));
// fptr->fullname = <FILENAME.EXT>
_tcsncpy( fptr->fullname, imagetitle, MAX_DISK_FULL_NAME );
fptr->fullname[ MAX_DISK_FULL_NAME ] = 0;
if (imagetitle[0])
{
LPTSTR dot = imagetitle;
if (_tcsrchr(dot,TEXT('.')))
dot = _tcsrchr(dot,TEXT('.'));
if (dot > imagetitle)
*dot = 0;
}
// fptr->imagename = <FILENAME> (ie. no extension)
_tcsncpy( fptr->imagename, imagetitle, MAX_DISK_IMAGE_NAME );
fptr->imagename[ MAX_DISK_IMAGE_NAME ] = 0;
}
//===========================================================================
static bool IsDriveValid(const int iDrive)
{
return (iDrive >= 0 && iDrive < NUM_DRIVES);
}
//===========================================================================
static void AllocTrack(const int iDrive)
{
Disk_t * fptr = &g_aFloppyDisk[iDrive];
fptr->trackimage = (LPBYTE)VirtualAlloc(NULL, NIBBLES_PER_TRACK, MEM_COMMIT, PAGE_READWRITE);
}
//===========================================================================
static void ReadTrack(const int iDrive)
{
if (! IsDriveValid( iDrive ))
return;
Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
if (pFloppy->track >= ImageGetNumTracks(pFloppy->imagehandle))
{
pFloppy->trackimagedata = 0;
return;
}
if (! pFloppy->trackimage)
AllocTrack( iDrive );
if (pFloppy->trackimage && pFloppy->imagehandle)
{
LOG_DISK("track %02X%s read\r", pFloppy->track, (pFloppy->phase & 1) ? ".5" : " ");
ImageReadTrack(
pFloppy->imagehandle,
pFloppy->track,
pFloppy->phase,
pFloppy->trackimage,
&pFloppy->nibbles);
pFloppy->byte = 0;
pFloppy->trackimagedata = (pFloppy->nibbles != 0);
}
}
//===========================================================================
static void RemoveDisk(const int iDrive)
{
Disk_t *pFloppy = &g_aFloppyDisk[iDrive];
if (pFloppy->imagehandle)
{
if (pFloppy->trackimage && pFloppy->trackimagedirty)
WriteTrack( iDrive);
ImageClose(pFloppy->imagehandle);
pFloppy->imagehandle = (HIMAGE)0;
}
if (pFloppy->trackimage)
{
VirtualFree(pFloppy->trackimage,0,MEM_RELEASE);
pFloppy->trackimage = NULL;
pFloppy->trackimagedata = 0;
}
memset( pFloppy->imagename, 0, MAX_DISK_IMAGE_NAME+1 );
memset( pFloppy->fullname , 0, MAX_DISK_FULL_NAME +1 );
pFloppy->strFilenameInZip = "";
DiskSetDiskPathFilename(iDrive, "");
Disk_SaveLastDiskImage( iDrive );
Video_ResetScreenshotCounter( NULL );
}
//===========================================================================
static void WriteTrack(const int iDrive)
{
Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
if (pFloppy->track >= ImageGetNumTracks(pFloppy->imagehandle))
return;
if (pFloppy->bWriteProtected)
return;
if (pFloppy->trackimage && pFloppy->imagehandle)
ImageWriteTrack(
pFloppy->imagehandle,
pFloppy->track,
pFloppy->phase,
pFloppy->trackimage,
pFloppy->nibbles );
pFloppy->trackimagedirty = 0;
}
//
// ----- ALL GLOBALLY ACCESSIBLE FUNCTIONS ARE BELOW THIS LINE -----
//
//===========================================================================
void DiskBoot(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 (g_aFloppyDisk[0].imagehandle && ImageBoot(g_aFloppyDisk[0].imagehandle))
floppymotoron = 0;
}
//===========================================================================
static BYTE __stdcall DiskControlMotor(WORD, WORD address, BYTE, BYTE, ULONG)
{
floppymotoron = address & 1;
LOG_DISK("motor %s\r", (floppymotoron) ? "on" : "off");
CheckSpinning();
return MemReturnRandomData(1);
}
//===========================================================================
static BYTE __stdcall DiskControlStepper(WORD, WORD address, BYTE, BYTE, ULONG)
{
Disk_t * fptr = &g_aFloppyDisk[currdrive];
int phase = (address >> 1) & 3;
int phase_bit = (1 << phase);
#if 1
// update the magnet states
if (address & 1)
{
// phase on
phases |= phase_bit;
}
else
{
// phase off
phases &= ~phase_bit;
}
// 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
// momentum and timing are not accounted for ... maybe one day!
int direction = 0;
if (phases & (1 << ((fptr->phase + 1) & 3)))
direction += 1;
if (phases & (1 << ((fptr->phase + 3) & 3)))
direction -= 1;
// apply magnet step, if any
if (direction)
{
fptr->phase = MAX(0, MIN(79, fptr->phase + direction));
const int nNumTracksInImage = ImageGetNumTracks(fptr->imagehandle);
const int newtrack = (nNumTracksInImage == 0) ? 0
: MIN(nNumTracksInImage-1, fptr->phase >> 1); // (round half tracks down)
if (newtrack != fptr->track)
{
if (address & 1 == 0)
LOG_DISK("phase off stepped\r");
if (fptr->trackimage && fptr->trackimagedirty)
{
WriteTrack(currdrive);
}
fptr->track = newtrack;
fptr->trackimagedata = 0;
}
}
#else // Old 1.13.1 code for Chessmaster 2000 to work! (see bug#18109)
const int nNumTracksInImage = ImageGetNumTracks(fptr->imagehandle);
if (address & 1) {
int direction = 0;
if (phase == ((fptr->phase+1) & 3))
direction = 1;
if (phase == ((fptr->phase+3) & 3))
direction = -1;
if (direction) {
fptr->phase = MAX(0,MIN(79,fptr->phase+direction));
if (!(fptr->phase & 1)) {
int newtrack = MIN(nNumTracksInImage-1,fptr->phase >> 1);
if (newtrack != fptr->track) {
if (fptr->trackimage && fptr->trackimagedirty)
WriteTrack(currdrive);
fptr->track = newtrack;
fptr->trackimagedata = 0;
}
}
}
}
#endif
if (address & 1)
{
// phase on
phases |= phase_bit;
LOG_DISK("track %02X%s phases %d%d%d%d phase %d on address $C0E%X at %08X\r",
fptr->phase >> 1, (fptr->phase & 1) ? ".5" : " ", phases >> 3, (phases >> 2) & 1, (phases >> 1) & 1, phases & 1, phase, address & 0xF, ((DWORD)g_nCyclesTotal + g_dwCyclesThisFrame) - nCyclesLastStep);
nCyclesLastStep = g_nCyclesTotal + g_dwCyclesThisFrame;
}
else
{
// phase off
phases &= ~phase_bit;
LOG_DISK("track %02X%s phases %d%d%d%d phase %d off address $C0E%X at %08X\r",
fptr->phase >> 1, (fptr->phase & 1) ? ".5" : " ", phases >> 3, (phases >> 2) & 1, (phases >> 1) & 1, phases & 1, phase, address & 0xF, ((DWORD)g_nCyclesTotal + g_dwCyclesThisFrame) - nCyclesLastStep);
nCyclesLastStep = g_nCyclesTotal + g_dwCyclesThisFrame;
}
return (address == 0xE0) ? 0xFF : MemReturnRandomData(1);
}
//===========================================================================
void DiskDestroy(void)
{
g_bSaveDiskImage = false;
RemoveDisk(DRIVE_1);
g_bSaveDiskImage = false;
RemoveDisk(DRIVE_2);
g_bSaveDiskImage = true;
}
//===========================================================================
static BYTE __stdcall DiskEnable(WORD, WORD address, BYTE, BYTE, ULONG)
{
currdrive = address & 1;
g_aFloppyDisk[!currdrive].spinning = 0;
g_aFloppyDisk[!currdrive].writelight = 0;
CheckSpinning();
return 0;
}
//===========================================================================
void DiskEject(const int iDrive)
{
if (IsDriveValid(iDrive))
{
RemoveDisk(iDrive);
}
}
//===========================================================================
// Return the file or zip name
// . Used by Property Sheet Page (Disk)
LPCTSTR DiskGetFullName(const int iDrive)
{
return g_aFloppyDisk[iDrive].fullname;
}
// Return the filename
// . Used by Drive Buttons' tooltips
LPCTSTR DiskGetFullDiskFilename(const int iDrive)
{
if (!g_aFloppyDisk[iDrive].strFilenameInZip.empty())
return g_aFloppyDisk[iDrive].strFilenameInZip.c_str();
return DiskGetFullName(iDrive);
}
// Return the imagename
// . Used by Drive Button's icons & Property Sheet Page (Save snapshot)
LPCTSTR DiskGetBaseName(const int iDrive)
{
return g_aFloppyDisk[iDrive].imagename;
}
//===========================================================================
void DiskGetLightStatus(Disk_Status_e *pDisk1Status_, Disk_Status_e *pDisk2Status_)
{
// *drive1 = g_aFloppyDisk[0].spinning ? g_aFloppyDisk[0].writelight ? 2 : 1 : 0;
// *drive2 = g_aFloppyDisk[1].spinning ? g_aFloppyDisk[1].writelight ? 2 : 1 : 0;
if (pDisk1Status_)
*pDisk1Status_ = GetDriveLightStatus( 0 );
if (pDisk2Status_)
*pDisk2Status_ = GetDriveLightStatus( 1 );
}
//===========================================================================
void DiskInitialize(void)
{
int loop = NUM_DRIVES;
while (loop--)
ZeroMemory(&g_aFloppyDisk[loop],sizeof(Disk_t ));
TCHAR imagefilename[MAX_PATH];
_tcscpy(imagefilename,g_sProgramDir);
}
//===========================================================================
ImageError_e DiskInsert(const int iDrive, LPCTSTR pszImageFilename, const bool bForceWriteProtected, const bool bCreateIfNecessary)
{
Disk_t * fptr = &g_aFloppyDisk[iDrive];
if (fptr->imagehandle)
RemoveDisk(iDrive);
// Reset the drive's struct, but preserve the physical attributes (bug#18242: Platoon)
// . Changing the disk (in the drive) doesn't affect the drive's head etc.
{
int track = fptr->track;
int phase = fptr->phase;
ZeroMemory(fptr, sizeof(Disk_t));
fptr->track = track;
fptr->phase = phase;
}
const DWORD dwAttributes = GetFileAttributes(pszImageFilename);
if(dwAttributes == INVALID_FILE_ATTRIBUTES)
fptr->bWriteProtected = false; // Assume this is a new file to create
else
fptr->bWriteProtected = bForceWriteProtected ? true : (dwAttributes & FILE_ATTRIBUTE_READONLY);
ImageError_e Error = ImageOpen(pszImageFilename,
&fptr->imagehandle,
&fptr->bWriteProtected,
bCreateIfNecessary,
fptr->strFilenameInZip);
if (Error == eIMAGE_ERROR_NONE && ImageIsMultiFileZip(fptr->imagehandle))
{
TCHAR szText[100+MAX_PATH];
wsprintf(szText, "Only the first file in a multi-file zip is supported\nUse disk image '%s' ?", fptr->strFilenameInZip.c_str());
int nRes = MessageBox(g_hFrameWindow, szText, TEXT("Multi-Zip Warning"), MB_ICONWARNING | MB_YESNO | MB_SETFOREGROUND);
if (nRes == IDNO)
{
RemoveDisk(iDrive);
Error = eIMAGE_ERROR_REJECTED_MULTI_ZIP;
}
}
if (Error == eIMAGE_ERROR_NONE)
{
GetImageTitle(pszImageFilename, fptr);
DiskSetDiskPathFilename(iDrive, pszImageFilename);
//MessageBox( g_hFrameWindow, imagefilename, fptr->imagename, MB_OK );
Video_ResetScreenshotCounter( fptr->imagename );
}
else
{
Video_ResetScreenshotCounter( NULL );
}
Disk_SaveLastDiskImage( iDrive );
return Error;
}
//===========================================================================
BOOL DiskIsSpinning(void)
{
return floppymotoron;
}
//===========================================================================
void DiskNotifyInvalidImage(const int iDrive, 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:
wsprintf(
szBuffer,
TEXT("Unable to open the file %s."),
pszImageFilename);
break;
case eIMAGE_ERROR_BAD_SIZE:
wsprintf(
szBuffer,
TEXT("Unable to use the file %s\nbecause the ")
TEXT("disk image is an unsupported size."),
pszImageFilename);
break;
case eIMAGE_ERROR_BAD_FILE:
wsprintf(
szBuffer,
TEXT("Unable to use the file %s\nbecause the ")
TEXT("OS can't access it."),
pszImageFilename);
break;
case eIMAGE_ERROR_UNSUPPORTED:
wsprintf(
szBuffer,
TEXT("Unable to use the file %s\nbecause the ")
TEXT("disk image format is not recognized."),
pszImageFilename);
break;
case eIMAGE_ERROR_UNSUPPORTED_HDV:
wsprintf(
szBuffer,
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:
wsprintf(
szBuffer,
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,
g_aFloppyDisk[iDrive].strFilenameInZip.c_str());
break;
case eIMAGE_ERROR_GZ:
case eIMAGE_ERROR_ZIP:
wsprintf(
szBuffer,
TEXT("Unable to use the compressed file %s\nbecause the ")
TEXT("compressed disk image is corrupt/unsupported."),
pszImageFilename);
break;
default:
// IGNORE OTHER ERRORS SILENTLY
return;
}
MessageBox(
g_hFrameWindow,
szBuffer,
g_pAppTitle,
MB_ICONEXCLAMATION | MB_SETFOREGROUND);
}
//===========================================================================
bool DiskGetProtect(const int iDrive)
{
if (IsDriveValid(iDrive))
{
Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
if (pFloppy->bWriteProtected)
return true;
}
return false;
}
//===========================================================================
void DiskSetProtect(const int iDrive, const bool bWriteProtect)
{
if (IsDriveValid( iDrive ))
{
Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
pFloppy->bWriteProtected = bWriteProtect;
}
}
//===========================================================================
bool Disk_ImageIsWriteProtected(const int iDrive)
{
if (!IsDriveValid(iDrive))
return true;
Disk_t *pFloppy = &g_aFloppyDisk[iDrive];
return ImageIsWriteProtected(pFloppy->imagehandle);
}
//===========================================================================
bool Disk_IsDriveEmpty(const int iDrive)
{
if (!IsDriveValid(iDrive))
return true;
Disk_t *pFloppy = &g_aFloppyDisk[iDrive];
return pFloppy->imagehandle == NULL;
}
//===========================================================================
static BYTE __stdcall DiskReadWrite (WORD programcounter, WORD, BYTE, BYTE, ULONG)
{
Disk_t * fptr = &g_aFloppyDisk[currdrive];
diskaccessed = 1;
if (!fptr->trackimagedata && fptr->imagehandle)
ReadTrack(currdrive);
if (!fptr->trackimagedata)
return 0xFF;
BYTE result = 0;
if (!floppywritemode || !fptr->bWriteProtected)
{
if (floppywritemode)
{
if (floppylatch & 0x80)
{
*(fptr->trackimage+fptr->byte) = floppylatch;
fptr->trackimagedirty = 1;
}
else
{
return 0;
}
}
else
{
if (!floppymotoron)
LOG_DISK("reading with motor off at $%04X\r", regs.pc);
result = *(fptr->trackimage + fptr->byte);
}
}
if (0)
{ LOG_DISK("nib %4X = %2X\r", fptr->byte, result); }
if (++fptr->byte >= fptr->nibbles)
fptr->byte = 0;
return result;
}
//===========================================================================
void DiskReset(void)
{
floppymotoron = 0;
phases = 0;
}
//===========================================================================
void DiskSelectImage(const int iDrive, LPSTR pszFilename)
{
TCHAR directory[MAX_PATH] = TEXT("");
TCHAR filename[MAX_PATH] = TEXT("");
TCHAR title[40];
strcpy(filename, pszFilename);
RegLoadString(TEXT(REG_PREFS), REGVALUE_PREF_START_DIR, 1, directory, MAX_PATH);
_tcscpy(title, TEXT("Select Disk Image For Drive "));
_tcscat(title, iDrive ? TEXT("2") : TEXT("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;*.zip;*.2mg;*.2img;*.iie;*.apl\0")
TEXT("Disk Images (*.bin,*.do,*.dsk,*.nib,*.po,*.gz,*.zip,*.2mg,*.2img,*.iie)\0*.bin;*.do;*.dsk;*.nib;*.po;*.gz;*.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;
if (GetOpenFileName(&ofn))
{
if ((!ofn.nFileExtension) || !filename[ofn.nFileExtension])
_tcscat(filename,TEXT(".dsk"));
ImageError_e Error = DiskInsert(iDrive, filename, ofn.Flags & OFN_READONLY, IMAGE_CREATE);
if (Error == eIMAGE_ERROR_NONE)
{
DiskSetDiskPathFilename(iDrive, filename);
filename[ofn.nFileOffset] = 0;
if (_tcsicmp(directory, filename))
RegSaveString(TEXT(REG_PREFS), TEXT(REGVALUE_PREF_START_DIR), 1, filename);
}
else
{
DiskNotifyInvalidImage(iDrive, filename, Error);
}
}
}
//===========================================================================
void DiskSelect(const int iDrive)
{
DiskSelectImage(iDrive, TEXT(""));
}
//===========================================================================
static BYTE __stdcall DiskSetLatchValue(WORD, WORD, BYTE write, BYTE value, ULONG) {
if (write)
floppylatch = value;
return floppylatch;
}
//===========================================================================
static BYTE __stdcall DiskSetReadMode(WORD, WORD, BYTE, BYTE, ULONG)
{
floppywritemode = 0;
return MemReturnRandomData(g_aFloppyDisk[currdrive].bWriteProtected);
}
//===========================================================================
static BYTE __stdcall DiskSetWriteMode(WORD, WORD, BYTE, BYTE, ULONG)
{
floppywritemode = 1;
BOOL modechange = !g_aFloppyDisk[currdrive].writelight;
g_aFloppyDisk[currdrive].writelight = 20000;
if (modechange)
FrameRefreshStatus(DRAW_LEDS);
return MemReturnRandomData(1);
}
//===========================================================================
void DiskUpdatePosition(DWORD cycles)
{
int loop = NUM_DRIVES;
while (loop--)
{
Disk_t * fptr = &g_aFloppyDisk[loop];
if (fptr->spinning && !floppymotoron) {
if (!(fptr->spinning -= MIN(fptr->spinning, (cycles >> 6))))
FrameRefreshStatus(DRAW_LEDS);
}
if (floppywritemode && (currdrive == loop) && fptr->spinning)
{
fptr->writelight = 20000;
}
else if (fptr->writelight)
{
if (!(fptr->writelight -= MIN(fptr->writelight, (cycles >> 6))))
FrameRefreshStatus(DRAW_LEDS);
}
if ((!enhancedisk) && (!diskaccessed) && fptr->spinning)
{
fptr->byte += (cycles >> 5);
if (fptr->byte >= fptr->nibbles)
fptr->byte -= fptr->nibbles;
}
}
diskaccessed = 0;
}
//===========================================================================
bool DiskDriveSwap(void)
{
// Refuse to swap if either Disk][ is active
if(g_aFloppyDisk[0].spinning || g_aFloppyDisk[1].spinning)
return false;
// Swap disks between drives
// . NB. We swap trackimage ptrs (so don't need to swap the buffers' data)
// . TODO: Consider array of Pointers: Disk_t* g_aDrive[]
swap(g_aFloppyDisk[0], g_aFloppyDisk[1]);
Disk_SaveLastDiskImage(DRIVE_1);
Disk_SaveLastDiskImage(DRIVE_2);
FrameRefreshStatus(DRAW_LEDS | DRAW_BUTTON_DRIVES);
return true;
}
//===========================================================================
static BYTE __stdcall Disk_IORead(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft);
static BYTE __stdcall Disk_IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft);
// TODO: LoadRom_Disk_Floppy()
void DiskLoadRom(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);
// NB. 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
RegisterIoHandler(uSlot, Disk_IORead, Disk_IOWrite, NULL, NULL, NULL, NULL);
}
//===========================================================================
static BYTE __stdcall Disk_IORead(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
{
addr &= 0xFF;
switch (addr & 0xf)
{
case 0x0: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x1: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x2: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x3: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x4: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x5: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x6: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x7: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x8: return DiskControlMotor(pc, addr, bWrite, d, nCyclesLeft);
case 0x9: return DiskControlMotor(pc, addr, bWrite, d, nCyclesLeft);
case 0xA: return DiskEnable(pc, addr, bWrite, d, nCyclesLeft);
case 0xB: return DiskEnable(pc, addr, bWrite, d, nCyclesLeft);
case 0xC: return DiskReadWrite(pc, addr, bWrite, d, nCyclesLeft);
case 0xD: return DiskSetLatchValue(pc, addr, bWrite, d, nCyclesLeft);
case 0xE: return DiskSetReadMode(pc, addr, bWrite, d, nCyclesLeft);
case 0xF: return DiskSetWriteMode(pc, addr, bWrite, d, nCyclesLeft);
}
return 0;
}
static BYTE __stdcall Disk_IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
{
addr &= 0xFF;
switch (addr & 0xf)
{
case 0x0: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x1: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x2: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x3: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x4: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x5: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x6: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x7: return DiskControlStepper(pc, addr, bWrite, d, nCyclesLeft);
case 0x8: return DiskControlMotor(pc, addr, bWrite, d, nCyclesLeft);
case 0x9: return DiskControlMotor(pc, addr, bWrite, d, nCyclesLeft);
case 0xA: return DiskEnable(pc, addr, bWrite, d, nCyclesLeft);
case 0xB: return DiskEnable(pc, addr, bWrite, d, nCyclesLeft);
case 0xC: return DiskReadWrite(pc, addr, bWrite, d, nCyclesLeft);
case 0xD: return DiskSetLatchValue(pc, addr, bWrite, d, nCyclesLeft);
case 0xE: return DiskSetReadMode(pc, addr, bWrite, d, nCyclesLeft);
case 0xF: return DiskSetWriteMode(pc, addr, bWrite, d, nCyclesLeft);
}
return 0;
}
//===========================================================================
DWORD DiskGetSnapshot(SS_CARD_DISK2* pSS, DWORD dwSlot)
{
pSS->Hdr.UnitHdr.dwLength = sizeof(SS_CARD_DISK2);
pSS->Hdr.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,2);
pSS->Hdr.dwSlot = dwSlot;
pSS->Hdr.dwType = CT_Disk2;
pSS->phases = phases; // new in 1.0.0.2 disk snapshots
pSS->currdrive = currdrive; // this was an int in 1.0.0.1 disk snapshots
pSS->diskaccessed = diskaccessed;
pSS->enhancedisk = enhancedisk;
pSS->floppylatch = floppylatch;
pSS->floppymotoron = floppymotoron;
pSS->floppywritemode = floppywritemode;
for(UINT i=0; i<NUM_DRIVES; i++)
{
strcpy(pSS->Unit[i].szFileName, g_aFloppyDisk[i].fullname);
pSS->Unit[i].track = g_aFloppyDisk[i].track;
pSS->Unit[i].phase = g_aFloppyDisk[i].phase;
pSS->Unit[i].byte = g_aFloppyDisk[i].byte;
pSS->Unit[i].writeprotected = g_aFloppyDisk[i].bWriteProtected ? TRUE : FALSE;
pSS->Unit[i].trackimagedata = g_aFloppyDisk[i].trackimagedata;
pSS->Unit[i].trackimagedirty = g_aFloppyDisk[i].trackimagedirty;
pSS->Unit[i].spinning = g_aFloppyDisk[i].spinning;
pSS->Unit[i].writelight = g_aFloppyDisk[i].writelight;
pSS->Unit[i].nibbles = g_aFloppyDisk[i].nibbles;
if(g_aFloppyDisk[i].trackimage)
memcpy(pSS->Unit[i].nTrack, g_aFloppyDisk[i].trackimage, NIBBLES_PER_TRACK);
else
memset(pSS->Unit[i].nTrack, 0, NIBBLES_PER_TRACK);
}
return 0;
}
DWORD DiskSetSnapshot(SS_CARD_DISK2* pSS, DWORD /*dwSlot*/)
{
if(pSS->Hdr.UnitHdr.dwVersion > MAKE_VERSION(1,0,0,2))
{
return -1;
}
phases = pSS->phases; // new in 1.0.0.2 disk snapshots
currdrive = pSS->currdrive; // this was an int in 1.0.0.1 disk snapshots
diskaccessed = pSS->diskaccessed;
enhancedisk = pSS->enhancedisk;
floppylatch = pSS->floppylatch;
floppymotoron = pSS->floppymotoron;
floppywritemode = pSS->floppywritemode;
// Eject all disks first in case Drive-2 contains disk to be inserted into Drive-1
for(UINT i=0; i<NUM_DRIVES; i++)
{
DiskEject(i); // Remove any disk & update Registry to reflect empty drive
ZeroMemory(&g_aFloppyDisk[i], sizeof(Disk_t ));
}
for(UINT i=0; i<NUM_DRIVES; i++)
{
if(pSS->Unit[i].szFileName[0] == 0x00)
continue;
DWORD dwAttributes = GetFileAttributes(pSS->Unit[i].szFileName);
if(dwAttributes == INVALID_FILE_ATTRIBUTES)
{
// Get user to browse for file
DiskSelectImage(i, pSS->Unit[i].szFileName);
dwAttributes = GetFileAttributes(pSS->Unit[i].szFileName);
}
bool bImageError = false;
if(dwAttributes != INVALID_FILE_ATTRIBUTES)
{
if(DiskInsert(i, pSS->Unit[i].szFileName, dwAttributes & FILE_ATTRIBUTE_READONLY, IMAGE_DONT_CREATE) != eIMAGE_ERROR_NONE)
bImageError = true;
// DiskInsert() sets up:
// . imagename
// . fullname
// . strDiskPathFilename
// . writeprotected
}
//
// strcpy(g_aFloppyDisk[i].fullname, pSS->Unit[i].szFileName);
g_aFloppyDisk[i].track = pSS->Unit[i].track;
g_aFloppyDisk[i].phase = pSS->Unit[i].phase;
g_aFloppyDisk[i].byte = pSS->Unit[i].byte;
// g_aFloppyDisk[i].writeprotected = pSS->Unit[i].writeprotected;
g_aFloppyDisk[i].trackimagedata = pSS->Unit[i].trackimagedata;
g_aFloppyDisk[i].trackimagedirty = pSS->Unit[i].trackimagedirty;
g_aFloppyDisk[i].spinning = pSS->Unit[i].spinning;
g_aFloppyDisk[i].writelight = pSS->Unit[i].writelight;
g_aFloppyDisk[i].nibbles = pSS->Unit[i].nibbles;
//
if(!bImageError)
{
if((g_aFloppyDisk[i].trackimage == NULL) && g_aFloppyDisk[i].nibbles)
AllocTrack(i);
if(g_aFloppyDisk[i].trackimage == NULL)
bImageError = true;
else
memcpy(g_aFloppyDisk[i].trackimage, pSS->Unit[i].nTrack, NIBBLES_PER_TRACK);
}
if(bImageError)
{
g_aFloppyDisk[i].trackimagedata = 0;
g_aFloppyDisk[i].trackimagedirty = 0;
g_aFloppyDisk[i].nibbles = 0;
}
}
FrameRefreshStatus(DRAW_LEDS | DRAW_BUTTON_DRIVES);
return 0;
}
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