COMswap.Com 1.3 swaps the two serial ports COM1: and COM2:
To put the ports back to normal, run COMswap again.  Not a TSR
so takes no RAM.  MASM source code included.  Programs that
bypass BIOS, such as Telix, may be unaffected.  Copyrighted but
may be distributed freely for non-military use.  By Roedy Green
of Canadian Mind Products.  Version 1.3 just displays the new
address and phone number.