4 ms·
>What were the AA batteries for? Some motherboards from the 286 era used 4 AAs as the CMOS backup battery.
by edmccard 12y ago
>What were the AA batteries for?
Some motherboards from the 286 era used 4 AAs as the CMOS backup battery.
- yuhong 12y agoTo be more precise, it was common with motherboards that used the MC146818 RTC chip used in the original PC/AT. The four AAs provided a total of 6V of power.