[ KA7-100 ]

How are the IRQ resources shared on the KA7 and KT7?
The AGP slot and PCI-1 share an IRQ
PCI-2 and PCI-3 share an IRQ
PCI-4, PCI-6, and USB controllers share an IRQ
PCI-5 has its own IRQ

Manually assigning the IRQs is possible in the "PnP/PCI configuration" BIOS submenu.
PIRQ_0 is for AGP and PCI-1
PIRQ_1 is for PCI-2 and PCI-3
PIRQ_2 is for PCI-5
PIRQ_3 is for PCI-4, PCI-6 and USB controllers.
What kind of power supply unit is suitable for the KT7, KT7-RAID, KA7, and KA7-100?
You can find listings of AMD certified power supply units at the following links.  If you have high power consumption devices (TV out or capture card) as well as many IDE drives, a stronger PSU is always preferable.
http://www1.amd.com/athlon/power
http://www1.amd.com/duron/power
How are the IRQ resources shared on the KA7-100 and KT7-RAID?
The AGP slot and PCI-1 share an IRQ, as do PCI-2 and PCI-3.  PCI-4 and PCI-6 share an IRQ, and PCI-5 shares an IRQ with the HPT370 IDE controller.
Manually assigning the IRQs is possible in the "PnP/PCI configuration" page of the BIOS as follows:
PIRQ_0 is for AGP and PCI-1
PIRQ_1 is for PCI-2 and PCI-3
PIRQ_2 is for PCI-5 and HPT370
PIRQ_3 is for PCI-4, PCI-6, and USB
Why was all my data lost after I created or deleted my RAID configuration?
Either creating or deleting a RAID array causes the data on a hard drive first to be removed and later rebuilt.  Please be sure to make a backup of your data before you create, delete, or alter a RAID array.
What kind of power supply unit is fit for KT7-RAID motherboard.(KA7/KA7-100/KT7/Kt7-RAID)
You may find a listing of AMD certified power supply units Here.If you have high power consumption devices(TV out or capture card)and many IDE drives, always choose a stronger PSU please.
http://www1.amd.com/athlon/power
http://www1.amd.com/duron/power
How's the IRQ sharing issue for KA7-100/KT7-RAID motherboard.
AGP and PCI-1 share and IRQ , PCI-2 and PCI-3 share an IRQ , PCI-4 and PCI-6 share an IRQ  ,  PCI-5 and HPT370 share an IRQ.
Manually assigning the IRQs is possible in BIOS "PnP/PCI configuration" page,
PIRQ_0 is for AGP and PCI-1
PIRQ_1 is for PCI-2 and PCI-3
PIRQ_2 is for PCI-5 and HPT370
PIRQ_3 is for PCI-4 , PCI-6 and USB
Why all my data get lost after I create/delete RAID in HPT370 BIOS.
Either creater or delete RAID in HPT370 BIOS will destory then rebuild the data construction on the hard drives. please backup your data via any kind of storage device before you create/delete/change RAID setting.
What kind of Slot-A Athlon CPUs do the KA7 and KA7-100 support?
 VIA KX133 chipset only supports Slot A Athlons with .25 architecture, not .18. To find out if your CPU is .25 or .28 architecture, check the number on the top of the cartridge. "AMD K7xxx" stands for .25, while "AMD-A0xxx" stands for .18 architecture. (The latter is also known as Thunderbird, and cannot be used on the KA7 or KA7-100.)
How does SoftMenu™ III on the KA7-100 work?
  ABIT’s KA7-100 is one of the few Athlon mainboards available with FSB setting options.  It uses "CPU FSB/PCI Clock" and "CPU FSB Plus" to achieve FSB settings from 100MHz to 183MHz in increments of 1.  The CPU FSB/PCI Clock setting provides FSB options from 100-155MHz in increments between 2 and 5MHz.  "CPU FSB Plus" is used to make further, small, adjustments.  Moreover, you don’t need to make all these complicated calculations yourself; SoftMenu™III does all the math for you.
I heard the KA7-100's BIOS features L2 Cache divider settings.  Is this true?

The RY BIOS has been available on ABIT's ftp site (ftp://ftp.abit.com.tw/pub/beta/) since June, but is now officially ready for download.  The most noteworthy feature of this update is its addition of two L2 cache divider factors beyond the Athlon’s native ½ default.   These 1/3 and 2/5 L2 cache dividers, and you’ve got safety at whatever speed you choose to select. 

Does the RY BIOS provide any other features besides the L2 cache dividers?

The RY BIOS also provides official support for the KA7-100's RAID capability, which boosts disk performance and data protection. Striping (RAID 0), Mirroring (RAID 1), and Striping/Mirroring (RAID 0+1) are all available.  In the case of Striping, identical drives can read and write data in parallel, thus increasing performance. Mirroring increases read performance through load balancing and elevator sorting while creating a complete backup of your files. Striping with Mirroring offers both high read/write performance and fault tolerance. The KA7-100's RAID functions are quick and easy to install and configure.

Does the ABIT KA7-100 support Slot A Thunderbird CPUs?
The KA7-100 does not officially support Slot A Thunderbird CPUs, but many users have reported varying degrees of success with them.  The factors that impact most heavily upon success rates are the CPU’s speed and production location.  Different CPU production facilities use different IC production methods (i.e. steel aluminum to apply the substrate instead of copper). One source for information on this topic is http://www.trainwrecker.com/Reviews/Tbird/TBirdKA71.htm
Where can I get more information on overclocking the KA7-100?

The best source for information on running CPUs beyond their specifications are online hardware sites.  Some of the sites that have reported tests on the KA7-100 and the Athlon 750 (which already features a great price/performance ratio) are:
http://firingsquad.gamers.com/
http://www.3dalpha.com/
http://www.athlonoc.com/
http://www.australianit.com.au/
http://www.hothardware.com/
http://www.nextdimensionhw.com/
http://www.overclockers.co.uk/
http://www.pchardware.ro/

Where can I find more information on the KA7 and KT7?

Should you have any questions regarding the KA7 or KT7, the following are links to a site offering the most extensive information. The answers to most any of your KA7 and KT7 questions can be found there.
http://go.to/kt7faq
http://go.to/ka7faq