Table of Contents
Advertisement
23.6
N ative vs. compatible IDE mode
9 7 B
23.6.1
C ompatible IDE Mode
1 4 6 B
The ATA controller emulates a legacy IDE controller, which is a non-standard extension of the ISA-based
IDE controller. In compatible mode, the controller requires two ISA IRQs (14 and 15) that cannot be
shared with other devices.
23.6.2
N ative Mode
1 4 7 B
The ATA controller acts as a true PCI device that does not require dedicated legacy resources and can be
configured anywhere in the system. ATA controllers running in native mode use their PCI interrupt for
both channels and can share this interrupt pin with other devices in the system, like any other PCI
device.
By requiring only one shareable interrupt instead of two non-shareable ones, native-mode controllers
significantly decrease the likelihood that a user will install a device that cannot work because no
interrupts are available.
Enable Native IDE Support in the BIOS Setup Utility if your OS supports this mode.
Notes: The Native Mode is not supported by all operating systems. The Native mode must be enabled in the BIOS
setup before the OS installation. Native Mode only works in ACPI mode. For more information see:
Microsoft Windows platform design notes about Native-mode ATA.
23.6.3
N ative Mode Configuration
1 4 8 B
Windows XP SP1 and Windows Server 2003 will switch a native-mode-capable ATA controller from
compatible to native mode if the BIOS indicates that the controller can be switched, the controller
supports native mode and the appropriate registry entry is set.
You must add a DWORD VALUE called EnableNativeModeATA under
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/PnP/PCI/
and set 1 as the value.
Kontron User's Guide
coolMonster/PM
23 22BImportant Technology Information
53
Advertisement
Table of Contents
