Your best bet is to cut into the chip similar to the ds128(8)7 battery mod and solder a battery holder on to the chipt, this datasheet will help you find the Vbat and BGND pins.

Thanks, I had seen the battery mod for the 1287, I was just unsure if this was similar enough for it to work, and which pins need to be tied into. I'll see what I can find in the datasheet. Thanks for attaching it!

I attached the datasheet on my post, the DS1585 and DS1587 are essentially the same, the ds1587 is a ds 1585 but on the ds1587 the vbat and bgnd as well as the oscillator pins are bent up and have the battery and oscillator soldered to them and then they pot the battery and oscillator in epoxy and put a plastic cover over it and stamp the dallas logo, the ds1587 part number and the date code on it.

Yeah, I didn't spot the attachment at first. Oops! I can handle that kind of mod.

Actually now that I look at it, there is an auxiliary battery pin on the chip, so you may be able to use that instead of having to hack in to the chip, Actually, is there an external battery header anywhere on the motherboard that interfaces to the Vbaux pin?

Good question, I'll have to see when I get to the office tomorrow. But here's a picture of the board.

I was searching for this part a month ago. Only place I could really find is this place, and its also called "Dantona COMP-99", though it only references a DS1587 as a compatible.

https://octopart.com/comp-99-dantona+industries-7154401

But I seriously doubt you want to buy a minimum of 10 of them at $45 each, or try to requisition-order just one (they might laugh at you...). I decided not to buy the motherboard that had the chip attached.

Let me know if you're able to cut into it like the other Dallas RTCs, as I've done that mod before with great success.

Thanks dogchainx, I'll see what I can find out. I'm not even positive if this is bad, I'm just trying to diagnose a non-start issue where it won't power on.