Motherboard Product Guide
If Use
OS is selected, the BIOS uses
time software to prevent conflicts between Plug
and Play and non-Plug and Play add-in cards. If
Use
OS is selected,
OS is the only
option visible in the subscreen.
OS
Enables the computer to boot with an operating
system capable of managing Plug and Play
in cards. The options are:
l
Disabled
l
Other
OS
l
Windows 95 (default)
This field will only be visible if the Configuration
Mode field is set to Use
OS.
ISA Shared Memory Size
Enables you to specify a range of memory
addresses that will be directed to the ISA bus
rather than to
memory. The options
are:
l
Disabled (default)
.
l
32 KB
. 48 KB
. 64 KB
. 80 KB
. 96 KB
If this field is set to Disabled, the ISA Shared
Memory Base Address field (described below)
will not appear.
This field should be enabled only when you are
using a non-Plug and Play ISA add-in card
(legacy card) that requires non-ROM memory
space. For example, video capture cards that
have video buffer memory.
By default, allocation of upper memory is as
follows: memory from
is
automatically shadowed. (This memory range is
typically reserved for video BIOS.) Memory from
is initially unshadowed. The
BIOS scans this range for any ISA add-in cards
that may be present and notes their location and
size. The BIOS will then automatically configure
the PCI and Plug and Play devices, shadowing
the ROM requirements (other than video) into
the area above
until that area is full. It
will then assign additional PCI and Plug and
Play add-in cards to the area between
and
If an ISA legacy card has
ROM memory requirements, the autoconfigure