Wanted to say 'Thanks' Thomas for that link. After performing the same hack as the OP (lithium cell upgrade), the clock in my A3000 no longer worked and was stuck at a certain date. Even after removing and reseating the I.C. next to it. SysInfo even reported that there was NO clock. After resetting the bits from your program, SysInfo now sees the clock and I am able to set the date and time. Not sure how accurate it keeps time (seems really slow), so going to fiddle with the pot next to it and see if that helps. There was a little bit of acid damage on a diode and another component, but nothing too bad. Using a DMM, I determined that the components are okay.
Thanks again!