The "plus" doesn't matter. It would work fine.
If you're concerned about the battery, I wouldn't be. Those devices have two batteries in them, and I've never seen one with dead batteries. And I've seen ones that are 20 years old.
If the NVRAM dies, the scope application would no longer boot up - it would hang.
I only see one on the PowerPC board. Is there one on another board? I'm in the process of removing all boards from the chassis and just give it a good overhaul. I'll still order and swap it out and put sockets in place but if there's 2, then hell, I need to order 2!
I'm not one to leave anything to chance (that can be a hindrance at times but I still manage to learn a helluva lot during the process, which is the end goal anyway). I decided this morning that I'm already too deep down the rabbit hole to stop now, I might as well see it through all the way.
Once I disassemble it and have everything laid out, I will take detailed pictures and post them here for reference. That way anyone can see what I see. I just need to figure out how I can post them. I will most likely host them on my server.
On another note, I dug up the schematics for the Intel 865G/865GV/865PE/865P chipset from my old desktop hdd I used for computer builds and repairs a decade ago, and still had most of my schematics. I didn't think about it 'til this morning when I was wondering why that chipset look so familiar. It was also used as a OEM Gateway board (can't remember which was which but the schematic is intel) and there was a conflict with the rear panel USB stacks. If you RMA'd an intel D865 with 2+2 stacks, sometimes you would get 4+2 which caused a shield mismatch. PITA situation but it stuck in my head thus, I was able to remember I have the schematic for this board
This way I can do a little more digging.
It would be great if I had a way to test the actual front panel to see if it is functioning properly, other than having another scope. How much did these things cost when they were new anyway?