While working on the game the past few days, I had noticed the battery on the MPU board. After doing more research on it, I did what I knew I should have done anyway; remove the battery. Certainly no major damage to the MPU, if any. I may be wrong, but I find it hard to believe a battery could go 23-24 yrs without leaking. Perhaps this one was replaced at some point, but it clearly hadn't been touched in years based on the dust covering it. I'll have to look closer at it, but I feel better having removed the battery. I'm not too worried about saving settings, but I may end up adding a safer battery system to it.