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Added FAT image access and DOS booter functionality

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1757
This commit is contained in:
Dean Beeler 2004-04-03 19:24:59 +00:00
parent 57a7795ae0
commit d0e2bfa15f
7 changed files with 2024 additions and 48 deletions
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125
src/dos/drives.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: drives.h,v 1.19 2004-01-10 14:03:34 qbix79 Exp $ */
/* $Id: drives.h,v 1.20 2004-04-03 19:22:33 canadacow Exp $ */
#ifndef _DRIVES_H__
#define _DRIVES_H__
@ -24,6 +24,7 @@
#include <sys/types.h>
#include "dos_system.h"
#include "shell.h" /* for DOS_Shell */
#include "bios.h" /* for fatDrive */
bool WildFileCmp(const char * file, const char * wild);
@ -31,6 +32,7 @@ class localDrive : public DOS_Drive {
public:
localDrive(const char * startdir,Bit16u _bytes_sector,Bit8u _sectors_cluster,Bit16u _total_clusters,Bit16u _free_clusters,Bit8u _mediaid);
virtual bool FileOpen(DOS_File * * file,char * name,Bit32u flags);
virtual FILE *GetSystemFilePtr(char * name, char * type);
virtual bool FileCreate(DOS_File * * file,char * name,Bit16u attributes);
virtual bool FileUnlink(char * name);
virtual bool RemoveDir(char * dir);
@ -61,6 +63,127 @@ private:
} allocation;
};
#ifdef _MSC_VER
#pragma pack (1)
#endif
struct bootstrap {
Bit8u nearjmp[3];
Bit8u oemname[8];
Bit16u bytespersector;
Bit8u sectorspercluster;
Bit16u reservedsectors;
Bit8u fatcopies;
Bit16u rootdirentries;
Bit16u totalsectorcount;
Bit8u mediadescriptor;
Bit16u sectorsperfat;
Bit16u sectorspertrack;
Bit16u headcount;
/* 32-bit FAT extensions */
Bit32u hiddensectorcount;
Bit32u totalsecdword;
Bit8u bootcode[474];
Bit8u magic1; /* 0x55 */
Bit8u magic2; /* 0xaa */
} GCC_ATTRIBUTE(packed);
struct direntry {
Bit8u entryname[11];
Bit8u attrib;
Bit8u NTRes;
Bit8u milliSecondStamp;
Bit16u crtTime;
Bit16u crtDate;
Bit16u accessDate;
Bit16u hiFirstClust;
Bit16u modTime;
Bit16u modDate;
Bit16u loFirstClust;
Bit32u entrysize;
} GCC_ATTRIBUTE(packed);
struct partTable {
Bit8u booter[446];
struct {
Bit8u bootflag;
Bit8u beginchs[3];
Bit8u parttype;
Bit8u endchs[3];
Bit32u absSectStart;
Bit32u partSize;
} pentry[4];
Bit8u magic1; /* 0x55 */
Bit8u magic2; /* 0xaa */
} GCC_ATTRIBUTE(packed);
#ifdef _MSC_VER
#pragma pack ()
#endif
class fatDrive : public DOS_Drive {
public:
fatDrive(const char * sysFilename, Bit32u bytesector, Bit32u cylsector, Bit32u headscyl, Bit32u cylinders, Bit32u startSector);
virtual bool FileOpen(DOS_File * * file,char * name,Bit32u flags);
virtual bool FileCreate(DOS_File * * file,char * name,Bit16u attributes);
virtual bool FileUnlink(char * name);
virtual bool RemoveDir(char * dir);
virtual bool MakeDir(char * dir);
virtual bool TestDir(char * dir);
virtual bool FindFirst(char * _dir,DOS_DTA & dta);
virtual bool FindNext(DOS_DTA & dta);
virtual bool GetFileAttr(char * name,Bit16u * attr);
virtual bool Rename(char * oldname,char * newname);
virtual bool AllocationInfo(Bit16u * _bytes_sector,Bit8u * _sectors_cluster,Bit16u * _total_clusters,Bit16u * _free_clusters);
virtual bool FileExists(const char* name);
virtual bool FileStat(const char* name, FileStat_Block * const stat_block);
virtual Bit8u GetMediaByte(void);
virtual bool isRemote(void);
public:
Bit32u getAbsoluteSectFromBytePos(Bit32u startClustNum, Bit32u bytePos);
Bit32u getSectorSize(void);
Bit32u getAbsoluteSectFromChain(Bit32u startClustNum, Bit32u logicalSector);
bool allocateCluster(Bit32u useCluster, Bit32u prevCluster);
Bit32u appendCluster(Bit32u startCluster);
void deleteClustChain(Bit32u startCluster);
Bit32u getFirstFreeClust(void);
bool directoryBrowse(Bit32u dirClustNumber, direntry *useEntry, Bit32s entNum);
bool directoryChange(Bit32u dirClustNumber, direntry *useEntry, Bit32s entNum);
imageDisk *loadedDisk;
private:
Bit32u getClusterValue(Bit32u clustNum);
void setClusterValue(Bit32u clustNum, Bit32u clustValue);
Bit32u getClustFirstSect(Bit32u clustNum);
bool FindNextInternal(Bit32u dirClustNumber, DOS_DTA & dta, direntry *foundEntry);
bool getDirClustNum(char * dir, Bit32u * clustNum, bool parDir);
bool getFileDirEntry(char * filename, direntry * useEntry, Bit32u * dirClust, Bit32u * subEntry);
bool addDirectoryEntry(Bit32u dirClustNumber, direntry useEntry);
void zeroOutCluster(Bit32u clustNumber);
bool getEntryName(char *fullname, char *entname);
friend void DOS_Shell::CMD_SUBST(char* args);
struct {
char srch_dir[CROSS_LEN];
} srchInfo[MAX_OPENDIRS];
struct {
Bit16u bytes_sector;
Bit8u sectors_cluster;
Bit16u total_clusters;
Bit16u free_clusters;
Bit8u mediaid;
} allocation;
bootstrap bootbuffer;
Bit8u fattype;
Bit32u CountOfClusters;
Bit32u partSectOff;
Bit32u firstDataSector;
Bit32u firstRootDirSect;
Bit32u cwdDirCluster;
Bit32u dirPosition; /* Position in directory search */
};
class cdromDrive : public localDrive
{
public: