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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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63
include/bios.h
View file

@ -16,6 +16,9 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _BIOS_H_
#define _BIOS_H_
#define BIOS_BASE_ADDRESS_COM1 0x400
#define BIOS_BASE_ADDRESS_COM2 0x402
#define BIOS_BASE_ADDRESS_COM3 0x404
@ -96,23 +99,57 @@
/* The Section handling Bios Disk Access */
#define BIOS_MAX_DISK 10
class BIOS_Disk {
public:
virtual Bit8u Read_Sector(Bit8u * count,Bit8u head,Bit16u cylinder,Bit16u sector,Bit8u * data)=0;
virtual Bit8u Write_Sector(Bit8u * count,Bit8u head,Bit16u cylinder,Bit16u sector,Bit8u * data)=0;
struct diskGeo {
Bit32u ksize; /* Size in kilobytes */
Bit16u secttrack; /* Sectors per track */
Bit16u headscyl; /* Heads per cylinder */
Bit16u cylcount; /* Cylinders per side */
Bit16u biosval; /* Type to return from BIOS */
};
class imageDisk : public BIOS_Disk {
extern diskGeo DiskGeometryList[];
#include <stdio.h>
#include "mem.h"
#include "dos_inc.h"
class imageDisk {
public:
Bit8u Read_Sector(Bit8u * count,Bit8u head,Bit16u cylinder,Bit16u sector,Bit8u * data);
Bit8u Write_Sector(Bit8u * count,Bit8u head,Bit16u cylinder,Bit16u sector,Bit8u * data);
imageDisk(char * file);
private:
Bit16u sector_size;
Bit16u heads,cylinders,sectors;
Bit8u * image;
Bit8u Read_Sector(Bit32u head,Bit32u cylinder,Bit32u sector,void * data);
Bit8u Write_Sector(Bit32u head,Bit32u cylinder,Bit32u sector,void * data);
Bit8u Read_AbsoluteSector(Bit32u sectnum, void * data);
Bit8u Write_AbsoluteSector(Bit32u sectnum, void * data);
void Set_Geometry(Bit32u setHeads, Bit32u setCyl, Bit32u setSect, Bit32u setSectSize);
void Get_Geometry(Bit32u * getHeads, Bit32u *getCyl, Bit32u *getSect, Bit32u *getSectSize);
Bit8u GetBiosType(void);
Bit32u getSectSize(void);
imageDisk(FILE *imgFile, Bit8u *imgName, Bit32u imgSizeK, bool isHardDisk);
~imageDisk() { if(diskimg != NULL) { fclose(diskimg); } };
bool hardDrive;
bool active;
FILE *diskimg;
Bit8u diskname[512];
Bit8u floppytype;
Bit32u sector_size;
Bit32u heads,cylinders,sectors;
};
void updateDPT(void);
#define MAX_HDD_IMAGES 2
extern imageDisk *imageDiskList[2 + MAX_HDD_IMAGES];
extern imageDisk *diskSwap[20];
extern Bits swapPosition;
extern Bit16u imgDTASeg; /* Real memory location of temporary DTA pointer for fat image disk access */
extern RealPt imgDTAPtr; /* Real memory location of temporary DTA pointer for fat image disk access */
extern DOS_DTA *imgDTA;
void swapInDisks(void);
void swapInNextDisk(void);
void BIOS_ZeroExtendedSize(void);
void char_out(Bit8u chr,Bit32u att,Bit8u page);
@ -123,4 +160,4 @@ void INT2F_StartUp(void);
void INT33_StartUp(void);
void INT13_StartUp(void);
#endif

21
include/dos_inc.h
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_inc.h,v 1.38 2004-02-28 16:35:42 qbix79 Exp $ */
/* $Id: dos_inc.h,v 1.39 2004-04-03 19:19:29 canadacow Exp $ */
#ifndef DOS_H_
#define DOS_H_
@ -67,6 +67,25 @@ struct DOS_Block {
} tables;
};
#ifdef _MSC_VER
#pragma pack (1)
#endif
union bootSector {
struct entries {
Bit8u jump[3];
Bit8u oem_name[8];
Bit16u bytesect;
Bit8u sectclust;
Bit16u reserve_sect;
Bit8u misc[496];
} bootdata;
Bit8u rawdata[512];
} GCC_ATTRIBUTE(packed);
#ifdef _MSC_VER
#pragma pack ()
#endif
enum { MCB_FREE=0x0000,MCB_DOS=0x0008 };
enum { RETURN_EXIT=0,RETURN_CTRLC=1,RETURN_ABORT=2,RETURN_TSR=3};