First post, by retro games 100
- Rank
- l33t
Mobo: UM8810PIAO, PCB revision 2.1, UMC chipset. It uses a Dallas real time chip, and its markings are:
DS12887A
9515A2 059577
I bought one of these on ebay:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewIt … em=250523279682 (Quantity remaining: over 100)
You get 2 chips, cheap as chips. And they work! I pulled the existing socketed chip off the board using a pair of pliers. I pushed the replacement(s) down using my fingers. The CMOS settings save OK. I pulled the mains plug out of the wall, waited 5 minutes, then retested the mobo. No problems. The replacement chips are marked with:
DS12887A
0419B1 340859
DS12887A
0432B1 342629
Now that this simple operation has worked, the real task is to break open the replacement chips, and replace the internal battery. But at least I can operate on them, knowing that I'm hacking in to spare chips, and not the original one.