Macintosh 630 family: Three Methods for Resetting PRAM

I need to fully clear the PRAM in my Macintosh 630 family computer, is there any other process other than holding down the Command-Option-P-R keys at startup?
There are three ways to reset PRAM on the Macintosh 630 family computers.

Command-Option-P-R still resets most of it, but there is also a red button near the SCSI connector on the logic board that needs to be pressed whenever the logic board is removed or replaced. The instructions for the User Installable Video Cards all say to press it just before the board goes back in the chassis.

Lastly, one could remove the battery for ten minutes then reinstall it.

The following computers are in the Macintosh 630 family: Performa 630, Performa 635, Performa 636, Performa 637, Performa 638, LC 630, and Quadra 630.
Published Date: Feb 19, 2012