Security Option - MSI ATX BX1 User Manual

Security Option

This category allows you to limit access to the system and Setup,
or just to Setup.
System
Setup(default)
PCI VGA Palette Snooping
Choose Disabled or Enabled. Some graphic controllers which are
not VGA compatible, take the output from a VGA controller and map it to
their display as a way to provide the boot information and the VGA
compatibility.
However, the color information coming from the VGA controller is
drawn from the palette table inside the VGA controller to generate the proper
colors, and the graphic controller needs to know what is in the palette of the
VGA controller. To do this, the non-VGA graphic controller watches for the
Write access to the VGA palette and registers the snoop data. In PCI based
systems, where the VGA controller is on the PCI bus and a non-VGA graphic
controller is on an ISA bus, the Write Access to the palette will not show up
on the ISA bus if the PCI VGA controller responds to the Writes.
In this case, the PCI VGA controller should not respond to the Write.
It should only snoop the data and permit the access to be forwarded to the ISA
bus. The non-VGA ISA graphic controller can then snoop the data on the ISA
bus. Unless you have the above situation, you should disable this option.
Disabled (default)
Enabled
OS Selection for DRAM > 64MB
Allows OS2
OS/2 (default) and OS2. Set to OS/2 if using more than 64MB and running
®
OS/2 .
The system will not boot and access to Setup
will be denied if the correct password is not
entered at the prompt.
The system will boot, but access to Setup will
be denied if the correct password is not entered
at the prompt.
Disables the function
Enables the function
®
to be used with > 64 MB of DRAM. Settings are Non-
3-11
®