Subject: Re: HPT366 (UDMA/66 patch)
To: None <>
From: Guenther Grau <>
List: current-users
Date: 03/11/2000 18:42:22
Manuel Bouyer wrote:
> > Now for the problem.  If you don't have the BIOS to set the chip up, how can
> > the driver find the bus clock speed?  I can't find anything in the PCI code
> > which seems to do this.  How many machines have PCI bus clocks which aren't
> > 33 MHz?  How many of those are something other than 25 or 40 MHz?  I suppose
> > I could get the bus clock from a config file option, but that seems a bit
> > tacky, so say the least.
> I've got some though about this for the other IDE chipsets too (also note
> you forgot a valid PCI speed: 30Mhz, and a unsupported one: 37.5Mhz):

And you also forgot a valid one, 66 Mhz. Some of my Sun server (e.g.
have 66 Mhz PCI slots. IIRC, even some high end x86 server have
66 Mhz PCI slots.