664 lines
18 KiB
C++
664 lines
18 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006, Tom Charlesworth, Michael Pohoreski
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AppleWin is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AppleWin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Description: Disk
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*
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* Author: Various
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*/
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#include "StdAfx.h"
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#pragma hdrstop
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// Public _________________________________________________________________________________________
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BOOL enhancedisk = 1;
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// Private ________________________________________________________________________________________
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const int MAX_DISK_IMAGE_NAME = 15;
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const int MAX_DISK_FULL_NAME = 127;
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struct Disk_t
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{
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TCHAR imagename[ MAX_DISK_IMAGE_NAME + 1 ];
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TCHAR fullname [ MAX_DISK_FULL_NAME + 1 ];
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HIMAGE imagehandle;
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int track;
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LPBYTE trackimage;
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int phase;
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int byte;
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BOOL writeprotected;
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BOOL trackimagedata;
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BOOL trackimagedirty;
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DWORD spinning;
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DWORD writelight;
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int nibbles;
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};
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static int currdrive = 0;
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static BOOL diskaccessed = 0;
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static Disk_t g_aFloppyDisk[DRIVES];
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static BYTE floppylatch = 0;
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static BOOL floppymotoron = 0;
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static BOOL floppywritemode = 0;
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static void ChecSpinning();
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static void ReadTrack (int drive);
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static void RemoveDisk (int drive);
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static void WriteTrack (int drive);
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//===========================================================================
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void CheckSpinning () {
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DWORD modechange = (floppymotoron && !g_aFloppyDisk[currdrive].spinning);
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if (floppymotoron)
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g_aFloppyDisk[currdrive].spinning = 20000;
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if (modechange)
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FrameRefreshStatus(DRAW_LEDS);
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}
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//===========================================================================
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void GetImageTitle (LPCTSTR imagefilename, Disk_t * fptr)
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{
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TCHAR imagetitle[ MAX_DISK_FULL_NAME+1 ];
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LPCTSTR startpos = imagefilename;
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// imagetitle = <FILENAME.EXT>
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if (_tcsrchr(startpos,TEXT('\\')))
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startpos = _tcsrchr(startpos,TEXT('\\'))+1;
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_tcsncpy(imagetitle,startpos,MAX_DISK_FULL_NAME);
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imagetitle[MAX_DISK_FULL_NAME] = 0;
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// if imagetitle contains a lowercase char, then found=1 (why?)
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BOOL found = 0;
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int loop = 0;
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while (imagetitle[loop] && !found)
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{
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if (IsCharLower(imagetitle[loop]))
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found = 1;
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else
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loop++;
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}
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if ((!found) && (loop > 2))
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CharLowerBuff(imagetitle+1,_tcslen(imagetitle+1));
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// fptr->fullname = <FILENAME.EXT>
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_tcsncpy( fptr->fullname, imagetitle, MAX_DISK_FULL_NAME );
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fptr->fullname[ MAX_DISK_FULL_NAME ] = 0;
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if (imagetitle[0])
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{
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LPTSTR dot = imagetitle;
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if (_tcsrchr(dot,TEXT('.')))
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dot = _tcsrchr(dot,TEXT('.'));
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if (dot > imagetitle)
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*dot = 0;
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}
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// fptr->imagename = <FILENAME> (ie. no extension)
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_tcsncpy( fptr->imagename, imagetitle, MAX_DISK_IMAGE_NAME );
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fptr->imagename[ MAX_DISK_IMAGE_NAME ] = 0;
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}
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//===========================================================================
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bool IsDriveValid( const int iDrive )
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{
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if (iDrive < 0)
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return false;
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if (iDrive >= DRIVES)
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return false;
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return true;
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}
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//===========================================================================
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static void AllocTrack(int drive)
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{
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Disk_t * fptr = &g_aFloppyDisk[drive];
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fptr->trackimage = (LPBYTE)VirtualAlloc(NULL,NIBBLES_PER_TRACK,MEM_COMMIT,PAGE_READWRITE);
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}
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//===========================================================================
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static void ReadTrack (int iDrive)
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{
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if (! IsDriveValid( iDrive ))
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return;
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Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
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if (pFloppy->track >= TRACKS)
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{
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pFloppy->trackimagedata = 0;
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return;
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}
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if (! pFloppy->trackimage)
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AllocTrack( iDrive );
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if (pFloppy->trackimage && pFloppy->imagehandle)
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{
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ImageReadTrack(
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pFloppy->imagehandle,
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pFloppy->track,
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pFloppy->phase,
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pFloppy->trackimage,
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&pFloppy->nibbles);
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pFloppy->byte = 0;
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pFloppy->trackimagedata = (pFloppy->nibbles != 0);
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}
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}
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//===========================================================================
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static void RemoveDisk (int iDrive)
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{
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Disk_t *pFloppy = &g_aFloppyDisk[iDrive];
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if (pFloppy->imagehandle)
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{
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if (pFloppy->trackimage && pFloppy->trackimagedirty)
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WriteTrack( iDrive);
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ImageClose(pFloppy->imagehandle);
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pFloppy->imagehandle = (HIMAGE)0;
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}
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if (pFloppy->trackimage)
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{
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VirtualFree(pFloppy->trackimage,0,MEM_RELEASE);
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pFloppy->trackimage = NULL;
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pFloppy->trackimagedata = 0;
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}
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memset( pFloppy->imagename, 0, MAX_DISK_IMAGE_NAME+1 );
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memset( pFloppy->fullname , 0, MAX_DISK_FULL_NAME +1 );
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}
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//===========================================================================
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static void WriteTrack (int iDrive)
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{
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Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
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if (pFloppy->track >= TRACKS)
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return;
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if (pFloppy->writeprotected)
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return;
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if (pFloppy->trackimage && pFloppy->imagehandle)
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ImageWriteTrack(
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pFloppy->imagehandle,
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pFloppy->track,
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pFloppy->phase,
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pFloppy->trackimage,
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pFloppy->nibbles );
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pFloppy->trackimagedirty = 0;
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}
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//
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// ----- ALL GLOBALLY ACCESSIBLE FUNCTIONS ARE BELOW THIS LINE -----
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//
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//===========================================================================
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void DiskBoot () {
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// THIS FUNCTION RELOADS A PROGRAM IMAGE IF ONE IS LOADED IN DRIVE ONE.
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// IF A DISK IMAGE OR NO IMAGE IS LOADED IN DRIVE ONE, IT DOES NOTHING.
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if (g_aFloppyDisk[0].imagehandle && ImageBoot(g_aFloppyDisk[0].imagehandle))
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floppymotoron = 0;
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}
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//===========================================================================
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BYTE __stdcall DiskControlMotor (WORD, BYTE address, BYTE, BYTE, ULONG) {
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floppymotoron = address & 1;
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CheckSpinning();
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return MemReturnRandomData(1);
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}
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//===========================================================================
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BYTE __stdcall DiskControlStepper (WORD, BYTE address, BYTE, BYTE, ULONG) {
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Disk_t * fptr = &g_aFloppyDisk[currdrive];
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if (address & 1) {
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int phase = (address >> 1) & 3;
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int direction = 0;
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if (phase == ((fptr->phase+1) & 3))
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direction = 1;
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if (phase == ((fptr->phase+3) & 3))
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direction = -1;
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if (direction) {
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fptr->phase = MAX(0,MIN(79,fptr->phase+direction));
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if (!(fptr->phase & 1)) {
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int newtrack = MIN(TRACKS-1,fptr->phase >> 1);
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if (newtrack != fptr->track) {
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if (fptr->trackimage && fptr->trackimagedirty)
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WriteTrack(currdrive);
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fptr->track = newtrack;
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fptr->trackimagedata = 0;
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}
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}
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}
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}
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return (address == 0xE0) ? 0xFF : MemReturnRandomData(1);
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}
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//===========================================================================
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void DiskDestroy ()
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{
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RemoveDisk(0);
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RemoveDisk(1);
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}
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//===========================================================================
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BYTE __stdcall DiskEnable (WORD, BYTE address, BYTE, BYTE, ULONG) {
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currdrive = address & 1;
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g_aFloppyDisk[!currdrive].spinning = 0;
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g_aFloppyDisk[!currdrive].writelight = 0;
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CheckSpinning();
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return 0;
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}
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//===========================================================================
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void DiskEject( const int iDrive )
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{
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if (IsDriveValid( iDrive ))
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{
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RemoveDisk( iDrive );
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}
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}
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//===========================================================================
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LPCTSTR DiskGetFullName (int drive) {
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return g_aFloppyDisk[drive].fullname;
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}
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//===========================================================================
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void DiskGetLightStatus (int *drive1, int *drive2) {
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*drive1 = g_aFloppyDisk[0].spinning ? g_aFloppyDisk[0].writelight ? 2
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: 1
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: 0;
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*drive2 = g_aFloppyDisk[1].spinning ? g_aFloppyDisk[1].writelight ? 2
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: 1
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: 0;
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}
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//===========================================================================
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LPCTSTR DiskGetName (int drive) {
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return g_aFloppyDisk[drive].imagename;
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}
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//===========================================================================
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void DiskInitialize () {
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int loop = DRIVES;
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while (loop--)
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ZeroMemory(&g_aFloppyDisk[loop],sizeof(Disk_t ));
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TCHAR imagefilename[MAX_PATH];
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_tcscpy(imagefilename,progdir);
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_tcscat(imagefilename,TEXT("MASTER.DSK"));
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DiskInsert(0,imagefilename,0,0);
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}
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//===========================================================================
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int DiskInsert (int drive, LPCTSTR imagefilename, BOOL writeprotected, BOOL createifnecessary) {
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Disk_t * fptr = &g_aFloppyDisk[drive];
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if (fptr->imagehandle)
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RemoveDisk(drive);
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ZeroMemory(fptr,sizeof(Disk_t ));
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fptr->writeprotected = writeprotected;
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int error = ImageOpen(imagefilename,
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&fptr->imagehandle,
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&fptr->writeprotected,
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createifnecessary);
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if (!error)
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GetImageTitle(imagefilename,fptr);
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return error;
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}
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//===========================================================================
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BOOL DiskIsSpinning () {
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return floppymotoron;
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}
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//===========================================================================
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void DiskNotifyInvalidImage (LPCTSTR imagefilename,int error)
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{
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TCHAR buffer[MAX_PATH+128];
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switch (error) {
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case 1:
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wsprintf(buffer,
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TEXT("Unable to open the file %s."),
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(LPCTSTR)imagefilename);
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break;
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case 2:
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wsprintf(buffer,
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TEXT("Unable to use the file %s\nbecause the ")
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TEXT("disk image format is not recognized."),
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(LPCTSTR)imagefilename);
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break;
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default:
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// IGNORE OTHER ERRORS SILENTLY
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return;
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}
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MessageBox(framewindow,
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buffer,
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TITLE,
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MB_ICONEXCLAMATION | MB_SETFOREGROUND);
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}
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//===========================================================================
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void DiskProtect( const int iDrive, const bool bWriteProtect )
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{
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if (IsDriveValid( iDrive ))
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{
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Disk_t *pFloppy = &g_aFloppyDisk[ iDrive ];
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pFloppy->writeprotected = bWriteProtect;
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}
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}
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//===========================================================================
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BYTE __stdcall DiskReadWrite (WORD programcounter, BYTE, BYTE, BYTE, ULONG) {
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Disk_t * fptr = &g_aFloppyDisk[currdrive];
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diskaccessed = 1;
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if ((!fptr->trackimagedata) && fptr->imagehandle)
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ReadTrack(currdrive);
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if (!fptr->trackimagedata)
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return 0xFF;
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BYTE result = 0;
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if ((!floppywritemode) || (!fptr->writeprotected))
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if (floppywritemode)
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if (floppylatch & 0x80) {
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*(fptr->trackimage+fptr->byte) = floppylatch;
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fptr->trackimagedirty = 1;
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}
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else
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return 0;
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else
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result = *(fptr->trackimage+fptr->byte);
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if (++fptr->byte >= fptr->nibbles)
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fptr->byte = 0;
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return result;
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}
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//===========================================================================
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void DiskReset () {
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floppymotoron = 0;
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}
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//===========================================================================
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void DiskSelectImage (int drive, LPSTR pszFilename)
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{
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TCHAR directory[MAX_PATH] = TEXT("");
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TCHAR filename[MAX_PATH];
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TCHAR title[40];
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strcpy(filename, pszFilename);
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RegLoadString(TEXT("Preferences"),TEXT("Starting Directory"),1,directory,MAX_PATH);
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_tcscpy(title,TEXT("Select Disk Image For Drive "));
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_tcscat(title,drive ? TEXT("2") : TEXT("1"));
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OPENFILENAME ofn;
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ZeroMemory(&ofn,sizeof(OPENFILENAME));
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ofn.lStructSize = sizeof(OPENFILENAME);
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ofn.hwndOwner = framewindow;
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ofn.hInstance = instance;
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ofn.lpstrFilter = TEXT("All Images\0*.apl;*.bin;*.do;*.dsk;*.iie;*.nib;*.po\0")
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TEXT("Disk Images (*.bin,*.do,*.dsk,*.iie,*.nib,*.po)\0*.bin;*.do;*.dsk;*.iie;*.nib;*.po\0")
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TEXT("All Files\0*.*\0");
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ofn.lpstrFile = filename;
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ofn.nMaxFile = MAX_PATH;
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ofn.lpstrInitialDir = directory;
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ofn.Flags = OFN_PATHMUSTEXIST;
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ofn.lpstrTitle = title;
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if (GetOpenFileName(&ofn))
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{
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if ((!ofn.nFileExtension) || !filename[ofn.nFileExtension])
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_tcscat(filename,TEXT(".DSK"));
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int error = DiskInsert(drive,filename,ofn.Flags & OFN_READONLY,1);
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if (!error)
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{
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filename[ofn.nFileOffset] = 0;
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if (_tcsicmp(directory,filename))
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RegSaveString(TEXT("Preferences"),TEXT("Starting Directory"),1,filename);
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}
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else
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{
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DiskNotifyInvalidImage(filename,error);
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}
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}
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}
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//===========================================================================
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void DiskSelect (int drive)
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{
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DiskSelectImage(drive, TEXT(""));
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}
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//===========================================================================
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BYTE __stdcall DiskSetLatchValue (WORD, BYTE, BYTE write, BYTE value, ULONG) {
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if (write)
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floppylatch = value;
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return floppylatch;
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}
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|
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//===========================================================================
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BYTE __stdcall DiskSetReadMode (WORD, BYTE, BYTE, BYTE, ULONG) {
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floppywritemode = 0;
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return MemReturnRandomData(g_aFloppyDisk[currdrive].writeprotected);
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}
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|
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//===========================================================================
|
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BYTE __stdcall DiskSetWriteMode (WORD, BYTE, BYTE, BYTE, ULONG) {
|
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floppywritemode = 1;
|
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BOOL modechange = !g_aFloppyDisk[currdrive].writelight;
|
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g_aFloppyDisk[currdrive].writelight = 20000;
|
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if (modechange)
|
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FrameRefreshStatus(DRAW_LEDS);
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return MemReturnRandomData(1);
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}
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|
|
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//===========================================================================
|
|
void DiskUpdatePosition (DWORD cycles) {
|
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int loop = 2;
|
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while (loop--) {
|
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Disk_t * fptr = &g_aFloppyDisk[loop];
|
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if (fptr->spinning && !floppymotoron) {
|
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if (!(fptr->spinning -= MIN(fptr->spinning,(cycles >> 6))))
|
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FrameRefreshStatus(DRAW_LEDS);
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}
|
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if (floppywritemode && (currdrive == loop) && fptr->spinning)
|
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fptr->writelight = 20000;
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else if (fptr->writelight) {
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if (!(fptr->writelight -= MIN(fptr->writelight,(cycles >> 6))))
|
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FrameRefreshStatus(DRAW_LEDS);
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}
|
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if ((!enhancedisk) && (!diskaccessed) && fptr->spinning) {
|
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needsprecision = cumulativecycles;
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fptr->byte += (cycles >> 5);
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if (fptr->byte >= fptr->nibbles)
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fptr->byte -= fptr->nibbles;
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}
|
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}
|
|
diskaccessed = 0;
|
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}
|
|
|
|
//===========================================================================
|
|
|
|
bool DiskDriveSwap()
|
|
{
|
|
// Refuse to swap if either Disk][ is active
|
|
if(g_aFloppyDisk[0].spinning || g_aFloppyDisk[1].spinning)
|
|
return false;
|
|
|
|
// Swap disks between drives
|
|
Disk_t temp;
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|
|
|
// Swap trackimage ptrs (so don't need to swap the buffers' data)
|
|
// TODO: Array of Pointers: Disk_t* g_aDrive[]
|
|
memcpy(&temp , &g_aFloppyDisk[0], sizeof(Disk_t ));
|
|
memcpy(&g_aFloppyDisk[0], &g_aFloppyDisk[1], sizeof(Disk_t ));
|
|
memcpy(&g_aFloppyDisk[1], &temp , sizeof(Disk_t ));
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|
|
|
FrameRefreshStatus(DRAW_LEDS | DRAW_BUTTON_DRIVES);
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|
|
|
return true;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
DWORD DiskGetSnapshot(SS_CARD_DISK2* pSS, DWORD dwSlot)
|
|
{
|
|
pSS->Hdr.UnitHdr.dwLength = sizeof(SS_CARD_DISK2);
|
|
pSS->Hdr.UnitHdr.dwVersion = MAKE_VERSION(1,0,0,1);
|
|
|
|
pSS->Hdr.dwSlot = dwSlot;
|
|
pSS->Hdr.dwType = CT_Disk2;
|
|
|
|
pSS->currdrive = currdrive;
|
|
pSS->diskaccessed = diskaccessed;
|
|
pSS->enhancedisk = enhancedisk;
|
|
pSS->floppylatch = floppylatch;
|
|
pSS->floppymotoron = floppymotoron;
|
|
pSS->floppywritemode = floppywritemode;
|
|
|
|
for(UINT i=0; i<2; 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].writeprotected;
|
|
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(1,0,0,1))
|
|
return -1;
|
|
|
|
currdrive = pSS->currdrive;
|
|
diskaccessed = pSS->diskaccessed;
|
|
enhancedisk = pSS->enhancedisk;
|
|
floppylatch = pSS->floppylatch;
|
|
floppymotoron = pSS->floppymotoron;
|
|
floppywritemode = pSS->floppywritemode;
|
|
|
|
for(UINT i=0; i<2; i++)
|
|
{
|
|
bool bImageError = false;
|
|
|
|
ZeroMemory(&g_aFloppyDisk[i], sizeof(Disk_t ));
|
|
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);
|
|
}
|
|
|
|
if(dwAttributes != INVALID_FILE_ATTRIBUTES)
|
|
{
|
|
BOOL bWriteProtected = (dwAttributes & FILE_ATTRIBUTE_READONLY) ? TRUE : FALSE;
|
|
|
|
if(DiskInsert(i, pSS->Unit[i].szFileName, bWriteProtected, 0))
|
|
bImageError = true;
|
|
|
|
// DiskInsert() sets up:
|
|
// . fullname
|
|
// . imagename
|
|
// . 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;
|
|
}
|