Help,
I am looking for some information on where the CMOS battery might be on this old machine, it is a Emerson 500EC, and 80286 - 16 MHz machine, it is telling me the CMOS battery is low. I have not been able to find a coin cell, a plug in battery, or a soldered in barrel style battery. The only thing that I have found is a Dallas Semiconductor DS1287, which is a real time clock/calender/alarm IC. I do know that it will need to be relaced, as it is old, and will not keep the time.
Is this device also the source of the battery backed CMOS ram?
Thank you for your help,
Retro4Me