Toshiba Equium 5160D Series Preliminary Maintenance Manual page 169

Soft-OFF Control
The system board design uses Soft-OFF control implemented under the SMM code in the
BIOS. This feature is required on the AP440FX system board. The CS1 pinout of the I/O
controller is connected to the Soft-off control line in the power supply circuit. The registers
in the I/O controller that set the I/O address and control of the CS1 pin are NOT setup until
the SMM code is activated. The code performs the following operations:
• OUT 0Ch to I/O port 2Eh
• OUT 75h to I/O port 2Fh
• OUT 11h to I/O port 2Eh
• OUT 00h to I/O port 2Fh
• OUT 0Dh to I/O port 2Eh
• OUT A0h to I/O port 2Fh
After setting the above registers, any read operation to I/O location 75H triggers the Soft-off
circuit and turns the power supply off
PCI Configuration Space Map
Table H-94 Model 6200D PCI Configuration Space Map
Bus Number (hex) Dev Number (hex) Function Number (hex) Description
00
00
00
00
00
00
00
00
TM
Equium Series Maintenance Manual------------------------------------------------------------ H-8
00 00
07 00
07 01
07 02
08 00
13 00
11 00
0B 00
Intel 82440FX (PMC) Host
Bridge
Intel 82371SB (PIIX3 ) ISA
bridge
Intel 82371SB (PIIX3 ) IDE
Controller
Intel 82371SB (PIIX3) USB
Video Controller
PCI Expansion Slot:
PCI Expansion Slot:
PCI Expansion Slot: Optional
PCI Expansion Slot for 3 slot
Riser