P.23 /64
CMOS
CMOS
Motorola 146818 RTC chip
Motorola 146818 RTC chip
256-Byte CMOS Memory (SRAM)
powered by BATT
PIIX4 allows the short-ckt of BATT to
clear CMOS.
ICH prefers the RTCRST# to clear CMOS
CMOS
CMOS
POST = Power On Self Test
ICH
CMOS
M146818
+3VSB
Lithium
Battery
BATT
BATT
CLRTC
RTCRST#
CPU
Post Code C5
Copy the BIOS from Flash
ROM into E000-FFFF
shadow DRAM so that
POST will go faster
Post Code 0B
Read CMOS Data into
BIOS Stack Area
GO ON the POST procedure
Comments to this Manuals