hecrod,
Boy, a lot of confused references here.
I have the igniter box from my '81/H with your identical number tid12-01b 4m4 10 on the box. It is a TCI box from the factory.
The XS650 models from '80 to '83 have a TCI (Transistor Controlled Ignition) just as XSLeo says. (See reference from Haynes manual, below) You may have bought a box for an XS650 that was called a CDI box because a lot of people on Ebay are stupid, and the term TCI was only used with certain Yamaha models, whereas the term CDI was very common, but they are two totally different systems that use two totally different methods of operation. CDI stands for Capacitor Discharge Ignition and they work by charging up a capacitor and then suddenly discharging the capacitor through the coil. The TCI system charges up the coil, and then releases the built up magnetic field to induce a spark in the secondary of the coil.
You also ask if you can use the 5 Ohm coil with the igniter box and the PAMCO. Well, the PAMCO does not need the igniter box or pickups from the TCI system. If you are going to use the PAMCO all you need is a coil, but in your case, you will also need the mechanical advance parts.
Also, if you have a 5 Ohm coil, then that is not a TCI coil. The TCI uses a 2.5 Ohm
I looked up the part number for the TCI in the official Yamaha site and came up with this:
4M4-82305-10-00 IGNITOR UNIT ASSEMBLY
Here is a shot from page 150 of the Haynes Manual for the XS650
I checked on Ebay and there is one individual from Michigan who has 4 "CDI" boxes for the XS650 for sale with that part number. I have sent him an Ebay message suggesting that he change his listing to TCI. I did not tell him he was an idiot, however, but it's Ebay listings like that that mislead people into referring to the ignition system on the XS650 as a CDI system.