CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 0Ch - RTCsee Real-Time Clock - STATUS REGISTER C (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 C: Bit(s) Description (Table C0003) 7 Interrupt request flag =1 when any or all of bits 6-4 are 1 and appropriate enables (Register B) are set to 1. Generates IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 8 when triggered. 6 Periodic Interrupt flag 5 Alarm Interrupt flag 4 Update-Ended Interrupt Flag 3-0 unused SeeAlso: #C0001,#C0002,#C0004