dosboot.c

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/* reboot.c

	DOS reboot program.

The program below works in TurboC (or MS C).  In some compilers, you
have to fold the address to 20 bits, but here the segment and offset
are separate.

*/



#define MAGIC           0               /* for cold restart */
/* #define MAGIC           0x1234          /* for warm restart */

#define BOOT_SEG        0xffffL
#define BOOT_OFF        0x0000L
#define BOOT_ADR        ((BOOT_SEG << 16) | BOOT_OFF)

#define DOS_SEG         0x0040L
#define RESET_FLAG      0x0072L
#define RESET_ADR       ((DOS_SEG << 16) | RESET_FLAG)

// delete warning for no prototype...
#pragma warn -pro

void dosboot( void )
{
        void ((far *fp)()) = (void (far *)()) BOOT_ADR;

        *(int far *)RESET_ADR = MAGIC;
        (*fp)();
//        return 0;       /* never gets here, but keeps compiler happy */
}