Supermicro C7Z87 User Manual page 83

Stolen Memory, and TSEG, respectively, if these devices are enabled. The op-
tions are Dynamic, 1 GB, 1.25 GB, 1.5 GB, 1.75 GB, 2 GB, 2.25 GB, 2.5 GB,
2.75 GB, 3 GB and 3.25 GB.
Note: TSEG is a block of memory that is only accessible by the processor
while operating in System Management Mode (SMM).
Memory Scrambler
This feature enables or disables memory scrambler support for memory error
correction. The settings are Enabled and Disabled.
PCH-IO Configuration

This item displays the information for the PCH-IO Chip.
•
Intel PCH Rev ID
•
USB Configuration
•
USB Devices: 1 Keyboard, 1 Mouse, 2 Hubs
EHCI1
Select Enabled to enable EHCI (Enhanced Host Controller Interface) Controller 1
for USB 2.0 support. One EHCI controller must always be enabled. The settings
are Enabled and Disabled.
EHCI2
Select Enabled to enable EHCI (Enhanced Host Controller Interface) Controller 2
for USB 2.0 support. One EHCI controller must always be enabled. The settings
are Enabled and Disabled.
Legacy USB Support
Select Enabled to support legacy USB devices. Select Auto to disable legacy
support when legacy USB devices are not present. If Disable is selected, legacy
USB devices will not be supported. The options are Enabled, Disabled and Auto.
Port 60/64 Emulation
This feature enables or disables I/O port 60h/64h emulation support. This should
be enabled for complete USB keyboard legacy support for non-USB-aware op-
erating systems. The options are Disabled and Enabled.
XHCI Hand-Off
This item is a work-around solution for operating systems that do not support
XHCI (Extensible Host Controller Interface) hand-off. The XHCI ownership
4-15
Chapter 4: AMI BIOS