CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 0Ah - RTCsee Real-Time Clock - STATUS REGISTER A (read/write) (usu 26h)


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 A:
Bit(s)	Description	(Table C0001)
 7	=1 time update cycle in progress, data ouputs undefined 
	(bit 7 is read only)
 6-4	22 stage divider
	010 = 32768 Hz time base (default)
 3-0	rate selection bits for interrupt
	0000 none
	0011 122 microseconds (minimum)
	1111 500 milliseconds	
	0110 976.562 microseconds (default 1024 Hz)
Notes:	some operating systems seem to change the CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. clock rate to slower
	  values for unknown purposes. Since on older ATs the clock rate does
	  not get restored after a cold boot, this may slow down disk
	  operations for example under PCIBM PC DOS which depends on the clock rate.
	If IBMBIO.COM finds a model byte FCh (sub-models 00h, 01h, 02h, 03h,
	  or 06h) during init, it resets the clock rate to the default value
	  (00100110b).
SeeAlso: #C0002,#C0003,#C0004