Intel SBC-455 - Manual (Page 57)

Chapter 3 AMI WinBIOS setup 49
The settings are No or Yes. The Optimal and Fail-Safe default
settings are Yes.
PCI/PnP Setup
PCI/PnP Setup options are displayed by choosing the PCI/PnP
Setup icon from the WINBIOS Setup main menu. All PCI/PnP Setup
options are described in this section.
Plug and Play Aware OS
Set this option to Yes if the operating system installed in the
computer is Plug and Play-aware. AMIBIOS only detects and
enables PnP ISA adapter cards that are required for system boot.
The Windows 95 operating system detects and enables all other
PnP-aware adapter cards. Windows 95 is PnP-aware. Set this option
to No if the operating system (such as DOS, OS/2, Windows 3.x)
does not use PnP.
You must set this option correctly or PnP-aware adapter cards
installed in your computer will not be configured properly.