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Date: Sun, 4 Aug 1996 10:30:56 -0500
From: "Daniel M. Eischen" <deischen@iworks.InterWorks.org>
To: Alain.Thivillon@alma.fr, questions@freebsd.org
Subject: Re: Ahc support in 2.1.5 ?
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> > You say "Adaptec 294x on EISA Bus (Dual Channel)"?  Is that a dual
> > EISA bus system, or an Adaptec 274x dual channel adapter.  The 294x
> > isn't on an EISA bus - it's a PCI bus adapter.
> >
> 
> You are right: the NetServer LC is an EISA/PCI system. The embbeded SCSI 
> Controler is on EISA Bus, this an AIC 7770 Chip (Twin Channels).
> 
> In fact, after checking the kernel configurations, i discover there 
> was in GENERIC of FreeBSD 2.1.0 the line :
> 
> controller      ahc1    at isa? bio irq ? vector ahcintr
> 
> This line as disappear in 2.1.5. My 2.1.0 Kernel boot with :
> 
> Aug  4 14:19:08 valerian /kernel: ahc1: Motherboard Twin Channel, A
> SCSI Id=7, BSCSI Id=7, aic7770 >= Rev E, 4 SCBs
> 
> And PCI bus was probed after this. Now PCI is probed just at startup. 
> Is discover also that EISA support as been changed. Im my GENERIC 
> 2.1.0 conf , there was no specific eisa line. Now i have :
> 
> controller      eisa0
> 
> But it seems that the eisa controler is not found.
> 
> Any clue ? Does someone use a HP NetServer LC with 2.1.5 ?
> I will try with the boot floppy of 2.2-CURRENT, just to see ...

I don't have an EISA system with the new EISA conf code, but I
think that the EISA probe is quiet unless a controller is found.
You might try booting with verbose (-v).

Have you disabled uha in user config?  This has been known to
conflict with the 274x/7770 causing them not to be probed.  At
boot go into to user config (-c) and try disabling uha0.

Dan Eischen
deischen@iworks.InterWorks.org