The coding of the program has been given next:
/* Program to make the Image of First Hard Disk (0x80) to the second Hard Disk (0x81) */
#include<stdio.h>
#include<dos.h>
#include<conio.h>
/* Structure to be used by getdrivegeometry function using
INT 13H Extension, Function Number 0x48. */
struct geometry
{
unsigned int size ; /* (call) size of Buffer */
unsigned int flags ; /* Information Flags */
unsigned long cyl ; /* Number of Physical
Cylinders on Drive */
unsigned long heads ;/* Number of Physical
Heads on Drive */
unsigned long spt ; /* Number of Physical
Sectors Per Track */
unsigned long sectors[2] ; /* Total Number of
Sectors on Drive */
unsigned int bps ; /* Bytes Per Sector */
} ;
/* Structure of Disk Address packet format, To be
used by the Functions, readabsolutesectors and writeabsolutesectors */
struct diskaddrpacket
{
char packetsize ; /* Size of Packet, generally 10H */
char reserved ; /* Reserved (0) */
int blockcount ; /* Number of Blocks to Transfer */
char far *bufferaddress ; /* address to Transfer
Buffer */
unsigned long blocknumber[2] ; /* Starting Absolute
Block Number */
} ;
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