[rescue] Ultra 2 NVRAM - failed fix

[silcreval]

I've started restoring an Ultra 2 which I've had on the shelf for a long time. 

These are nice machines, and sort of a bridge between the older pizza box Sun's and the later Ultra 10/30/60/80. They still come with SBUS slots, but have a UPA slot for a graphics card, usually a Creator3D.

They seem to take up to 2G of RAM. Mine has a single CPU and 256M of RAM by the looks of things (4 x 64). There are dual HD which are 4G each.

Mine seems to work fine and even boots to my surprise. However the NVRAM is of course dead as a dodo.

Now I've done the usual dremel job on the NVRAM, fitted a battery and then reset and re-entered the NVRAM values using MKP on the boot prompt.

But unusually this failed to work. I'm pretty sure the soldering etc is OK, and I actually removed the old battery from the chip so there is no short from that.

As this is not the usual M48T02 chip, it is instead a M48T59Y, I'm wondering if I'm missing something with the reset, or if the chip is just literally dead at this point?

Thanks as ever for the help

- Ian