On-the-mainboard ATA-100 Controller, are any "native?"

[klosters64a]

I've discovered that more than a few mainboards with built-in ATA-100 Controllers don't handle them as "native" IDE controllers. In other words, the motherboard's Bios starts the boot process normally. However, the mobo's Bios then takes a time out, and the ATA-100 controller's Bios(and ATA-66, too?) boots, and then the mainboard's Bios resumes and completes the boot process.
Just the same way that a ATA-100 Controller on a PCI card is handled.

Are there any mainboard's that handle the on board ATA-100(or ATA-66) Controller as an ordinary, olde fashioned "native" UDMA-33 IDE controller?

I'm asking because I want to use a SCSI host adapter on a PCI card. AFAIK, the ATA-100 controller is seen as a "SCSI device" in many mainboard's Bios. If this is true, I don't understand how a real SCSI controller can boot.
Any help in understanding this is most welcome. Thanks!

 

[marty]

This is interesting. I don't see my motherboard do a two step to get the IDE to 100. What should I look for in my Abit SE6? That is how would I know that the board was doing this thing?

 

[Big Lar]

The Abit SE6 and the SH6 ( of which I am now running), treat it as "Native" so to speak, for at least on the SH6 here, the Only ide is the ata controller.

 

[DocClock aka MadClocker]

I think the boards you are reffering to do treat the onboard as a scsi device, and in the bios it is reffered to as "external" and when you set it up for external, there is a further option for "ext means" and the two options are "ext means scsi" or "ext means ata100", and will either boot from your scsi card, or the onboard ata66/100.
My Abit BE6 ver1 has ata66, and it is reffered to as mentioned above.
The SH6 has naitive support for ata100, 1/2agp,133mhz bus,4x agp, and goes to 250mhz fsb in 1mhz increments.

 

[klosters64a]

Thank you for your replies, everyone! If the SH6 incorporates the ATA-100 Controller into the Bios, just like a regular IDE controller--does this hold true for other i815e/ep mainboards?
It would be nice to have SCSI drives and ATA drives that can "talk" to each other. While both an IDE and a SCSI drive can't boot at the same time, it seems to me that a SCSI host adaptor could never boot if the mainboard sees the built-in ATA-100 Controller as a "SCSI" device.

 

[DocClock aka MadClocker]

Sorry I wasn't more clear on that point, but what I meant was that the BE6, and BE6-2, both treat their ata66/100 as an external device, just like a card, but the 815 series chipsets reckognise the ata100, just like an ata33, and ata 100 is naitive to the 815 chipset, which is not the case with the 440bx chipset.
Even though the ata66/100 controler is built onto the BE6, BE6-2, BX133 RAID, and the like, they all treat the Hipoint controler as an add on device.
I forgot to mention that Abit manuals are very well writen, most all options are explained in detail...and most new Abit owners have no trouble setting up, because of the well writen manual....but as Abit caters to the overclocker, you do have to pay attention to the manual, to setup correctly.