FIC a440 服务手册
Hardware Functional Overview
FIC A440 Series Service Manual 4-13
PCI bus master Allocation:
REQ# Pin
PCI Device
REQ 0
CardBus
REQ 1
VGA
REQ 2
Audio
REQ 3
Modem / LAN
4.4.11 SMBus Devices
The SMBus is a two-wire interface through which the system can communicate with power-related chips. The BIOS
should initialize the SMBus devices during POST.
should initialize the SMBus devices during POST.
SMBus Device
Host/Slave
Address
BIOS Need to Initialize
VIA VT82C686A
Both Host and Slave
10h
Enable SMBus interface and SMBus interrupt
PIC16C62 – Micro P
Both Host and Slave
04h
No need
IMISC671 – Clock Synthesizer Slave
D2h
Program the desired clock frequency (Pin23
output 24MHz, Pin22 output 48MHz)
output 24MHz, Pin22 output 48MHz)
BQ 2040 – Smart Battery
Both Host and Slave
16h
No need
4.4.12 Resource Allocation
I/O Map
Hex Address
Device
000 – 01F
8237-1
020 – 021
8259-1
022 VIA
VT82C686A
040 – 05F
8254
060 – 06F
Keyboard Controller
070 – 07F
RTC & NMI Mask
080 – 08F
DMA Page Registers
092
System Control Port
0A0 – 0A1
8259-2
0C0 – 0DF
8237-2
0F0 – 0FF
Math Coprocessor
170 – 177
Secondary IDE Controller
1F0 – 1F7
Primary IDE Controller
200 – 20F
Game Port
220 – 22F
Sound Blaster
279
PnP configuration – Address port
2F8 – 2FF
FIR