CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 0Dh - RTCsee Real-Time Clock - STATUS REGISTER D (read only) Bitfields for Real-Time ClockA battery-powered clock which continues to maintain its time even while the system is powered down. On PCs, the real-time clock contains a small amount of battery-powered memory (set CMOS RAM). status register D: Bit(s) Description (Table C0004) 7 Valid RAM(Random Access Memory) See also DRAM, SRAM. - 1 indicates battery power good, 0 if dead or disconnected. 6-0 unused (0)