void harderr(int (*handler)())

void harderr(int (far *handler)())

void hardresume(int code)

void _hardresume(int code)

void hardretn(int code)

void _hardretn(int code)

void interrupt(*getvect(int intr))()

void getfat(unsigned char drive, struct fatinfo *fptr)

void getfatd(struct fatinfo *fptr)

void getdfree(unsigned char drive, struct dfree *dfptr)