A machine that is 14 years old may not be stock (factory original) inside.
A SX machine did not have a hard drive, booted from a floppy, and typically had a BMDC2 board.
The DX had a hard drive from which it booted.
Also there have been many variations of software.
Books should be sought for the machine/software you have.
Dove-tail ways means a series one machine.
I do not know a way to download the CMOS to a file and visa-versa.
But if your CMOS was lost due to a bad battery, you would probably not boot, would not read the floppy, and have the wrong time and date. 14 years ago, the CMOS battery was a 3 cell stack up of ni-cad button cells, welded together, and soldered onto the mother board. Usually these last about 5 years. So you must not have a original CMOS battery. Eventually if a bad battery is left on the mother board it will leak its electrolyte (potassium hydroxide) and destroy the mother board.
George
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)