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ErgoPro m664 PC Specialist's Handbook
Page 9-12 Edition 1 - Release 1 - March 1998
PCI Configuration Space Map
Bus number
(hex)
Device number
(hex)
Function number
(hex)
Description
00 00 00 Intel 82440LX (PAC)
00 01 00 Intel 82440LX AGP bus (PAC)
00 07 00 Intel 82371AB PCI/ISA Bridge (PIIX4)
00 07 01 Intel 82371AB IDE Bus Master (PIIX4)
00 07 02 Intel 82371AB USB (PIIX4)
00 07 03 Intel 82371AB Power Management (PIIX4)
00 0D 00 PCI expansion slot 1
00 0E 00 PCI expansion slot 2
00 0F 00 PCI expansion slot 3
00 10 00 PCI expansion slot 4
Timer
The system board has three programmable timers, defined as follows :
Channel Use
CH 0 System timer
CH 1 DRAM refresh timer
CH 2 Tone generator (Speaker)
Real-time clock (RTC) and CMOS RAM
A real-time clock component provides Real-Time Clock and Calendar functions. The circuit contains 114 bytes
of battery-backed-up CMOS-static RAM memory used for clock functions, and for storing the configuration
information (e.g., the number of diskette drives, the amount of system board memory, etc.).
The CMOS RAM memory is backed up with a non-rechargeable battery that has a considerable lifetime.
However, should the battery begin to fail, the following message (and possibly others) appears on the screen
during the power-on test:
System battery is dead - Replace and run SETUP
A used battery is an external coin-cell style , 3 V Lithium Cell battery (f.eg. Sony CR2032), which provides
power to the RTC and CMOS memory.