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TriGem Computer Inc.
Research & Development Center.
q
PCI interrupt & master number routing map
VIA VT82C686A PCI/ISA bridge has five programmable interrupt request input signals. Any PCI interrupt source
connects to one of these interrupts signals and assigned to the free proper interrupt number by PnP BIOS.
SB INT
First
signals
PCI slot
PIRQA
INTA
PIRQB
INTB
PIRQC
INTC
PIRQD
INTD
Master
REQ0
IDSEL
AD30
2-5. Advanced Configuration and Power Interface (ACPI)
The motherboard and system BIOS support the ACPI that requires an ACPI-aware operating system such as
Window-NT 5.0 or Windows 98. ACPI feature include
•
Plug and play and APM functionality normally contained in the BIOS
•
Power management control of individual devices: add-in cards, hard disk drives, USB devices, and
Video
•
A soft-off feature that enables operating system to power off the computer
•
Support for multiple wakeup events
•
Indication LED for normal mode (Green), standby mode (Blinking Green), and suspend mode (Blinking
Green) but this function is dependent on the LED logic.
q
Wakeup devices and events
Wakeup device
Power switch
LAN
Modem
Sleep button
2-6. Manufacturing Options
The motherboard has several manufacturing options according to OEM/ODM requirement. Make sure that these
options can be applied in the assembly stage, and it ' s impossible to upgrade or change in the customer field.
Option items
Joystick port
USB port
Sound function
Format No: TGDFBD06-A
Second
Third
PCI slot
PCI slot
INTB
INTC
INTC
INTD
INTD
INTA
INTA
INTB
REQ1
REQ2
AD29
AD27
Wakeup events and functionality
Wakeup from Power-off status and power-off function
Wakeup from power-off status
Wakeup from power-off status
Wakeup from power-off status and go to suspend mode (option)
Selectable functionality
Front side
Front side
PCI Audio & AC97 /
On chip Sound & AC97
Page10/ 18
On Board
VT82C686A
PCI Audio
INTA
REQ4
AD24
AD18
Feature changes
InstallCS4281 PCI Audio & CS4297A
or Install CS4297A
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