Q:

How to set many IRQ to lowest priorty

I see in msinfo32.exe that I have a ACPI-compliant system. 
For IRQs 54 to 511, I want to set them all to the lowest priority. 
by using registry
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PriorityControl
it's hard to set it one by one 
I want to set all by easy way
like "IRQ54-551Priority" 
is it possible? 

A:

Create and run a .bat file containing the following commands:
@echo off
echo Windows Registry Editor Version 5.00 >f.reg
echo.  >>f.reg
echo [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PriorityControl] >>f.reg
for /l %%G IN (54,1,511) DO echo "IRQ%%GPriority"=dword:00000001 >>f.reg

This will create the file f.reg in the current folder that will contain:
Windows Registry Editor Version 5.00 

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PriorityControl] 
"IRQ54Priority"=dword:00000001 
"IRQ55Priority"=dword:00000001 
...
"IRQ511Priority"=dword:00000001 

Double-click on the file f.reg to import all these registry entries. 
Replace in the script the 00000001 with the priority that you want
to assign all these IRQs.