void __near * __far memmove(void __near *s1, void __near *s2, size_t n);
void __far * __far _COM_memmove_ff(void __far *s1, void __far *s2, size_t n);
This function copies the n number of characters from a memory area indicated by s2 to a memory area indicated by s1.
Copying can be performed correctly even when the copy source area overlaps with the copy destination area.