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WinXP Home Edition - Event Viewer - System Error    ACPI

Posted on 2002-06-30
Medium Priority
Last Modified: 2008-02-01
AMLI: ACPI BIOS is attempting to write to an illegal IO port address (0xcf8), which lies in the 0xcf8 - 0xcff protected address range. This could lead to system instability. Please contact your system vendor for technical assistance.

Everything on my system seems be working fine yet I still keep getting this error.  I was able to find this exact error message listed on Microsoft Knowledge Base but not how to fix it.  In checking on system properties..  device manager,  Microsoft ACPI - Compliant System  
device status message states: This device is working properly.  

My mother board is a ASUS Cuv4x  and I have the very latest 4in1 drivers installed.  Power Management is disabled in the bios letting WinXP handle it.   A Zip drive and scanner are on my USB ports with the latest drivers installed.  The USB Root Hub - Power Management,   "Allow the computer to turn off this device to save power"  is disabled.  For my power management I only have my monitor standby setting enabled.  Everything else is turned off... so I see no reason to enable power management on the USB ports.
Question by:Robuz
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Accepted Solution

pvrnet earned 300 total points
ID: 7121816
Try these sites for solutions:


If none of the ideas work above, I would contact Asus regarding the bug.  You may need an updated BIOS.

I hope this helps

Expert Comment

ID: 7122194
Try these sites for solutions:


If none of the ideas work above, I would contact Asus regarding the bug.  You may need an updated BIOS.

I hope this helps

Author Comment

ID: 7126160
Installed the latested bios update but still getting the stupid error message 8-(    Looks like I'll have live with it or change my mother board!!!      

[CPU & BIOS Information]
System BIOS=1003,0
Manufacturer=-1,0,Award Software, Inc.
Version=-1,0,ASUS CUV4X ACPI BIOS Revision 1009
Plug & Play Version=-1,0,1.00
SMBIOS/DMI Version=-1,0,2.30
(EE)PROM Size=-1,0,256kB  (2Mbit)
Can be Updated (flashed)=-2,0,Yes
Can be Shadowed=-2,0,Yes
Is Socketed=-2,0,Yes
Supports APM=-2,0,Yes
Supports ACPI=-2,0,Yes      
Supports Plug & Play=-2,0,Yes
Supports ESCD=-2,0,Yes

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Author Comment

ID: 7138202
I'll give you the points since you took the time to comment.  The problem is partially true do to the bios and WindowsXP ASPI support....    Windows 98se  never had a problem with my bios and in some ways allowed me to change setting for IRQ and DMA ..    I don't like seeing that IRQ 9 is being shared by five devices...   plug an play  isn't fool proof    and  a person should still have some control on how his personal computer is setup.  I have a number of IRQ that are unused and in the old days it would be a sinple task to re-allocate them.  

Expert Comment

ID: 7359933

Did you ever figure out how to fix the ACPI problem?
I have the same motherboard, update to 1009 BIOS and I'm also having the problem as you, namely 5 devices on IRQ9, now this hasn't caused instability but one of these devices is my graphics card (riva tnt2) and XP only picks up the standard VGA device (the one from safe mode), which mean crap graphics & resolution.
Do you think this is the reason my graphics card isn't working?

Author Comment

ID: 7363925
Just wanted to say I no longer have the problem since my system got trashed...   Had to install a new Intel mother board and a P4 1.8 processor.  A snap-shot of my current IRQ.s...  

IRQ 1  Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
 IRQ 3  Communications Port
 IRQ 4  Communications Port
 IRQ 6  Standard floppy disk controller
 IRQ 8  System CMOS/real time clock
 IRQ 9  Microsoft ACPI-Compliant System
 IRQ 12  Logitech-compatible Mouse PS/2
 IRQ 14  Primary IDE Channel
 IRQ 15  Secondary IDE Channel
 IRQ 16  RADEON 7500 ( video board ) :)
 IRQ 17  Creative Sound Blaster PCI512
 IRQ 17  Intel(R) 82801BA/BAM SMBus Controller - 2443 (Intel(R) SMBus 2.0 Driver)
 IRQ 19  Intel(r) 82801BA/BAM USB Universal Host Controller - 2442
 IRQ 23  Creative DI5630 Data Fax Modem
 IRQ 23  Intel(r) 82801BA/BAM USB Universal Host Controller - 2444

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