On Thu, 2005-01-13 at 16:23 -0600, Richard Smith wrote: > On Thu, 13 Jan 2005 14:59:08 -0700 (MST), Ronald G. Minnich > <rminnich@lanl.gov> wrote: > > > > > > On Thu, 13 Jan 2005, Svante Signell wrote: > > > > > I found the BIOS chip brand and version: Its a Winbond W290C020-90 > > > > a nice common safe part. Try hamilton-avnet or arrow. WARNING: when you > > call them, use the EXACT part #. Their databases are not able to do fuzzy > > logic. > > http://www.digikey.com is your friend. > > Well really almost any JDEC part 2MBits and larger will work. If you > use a larger part you might have to ground the unused address lines if > they left them floating on the pcb.
Thanks for the links. No luck with any of the links given, however. How to find a replacement part? > > > > no idea on the FSB settings -- I think linuxbios always goes with the > > fastest :-) > > The FSB is set via the clock chip. The clock chip we have is set via > straps. I'm not sure what your commercial bios is doing but the 440bx > is not rated for over 100Mhz. So those other settings are > overclockings. And they will change the speed of your PCI bus as > well. I know about the 100MHz rating for 440BX. However, on the board you can select 66/100 MHz FSB and the BIOS supports the higher FSB speeds. Also the board has multiplier settings (3-5) x (66,100) MHz = 200-500 MHz for CPUs with changable clock multipliers. The board runs today with dual Celeron (Mendocino, 300MHz, before Intel disabled dual on Celerons) at 103/66*300MHz = 466MHz stably for many years now. BTW: The memories I have installed are all PC133 parts. > I suspect your board has a small microcontroller on it with eeprom > that sets the strap settings on boot and then de-asserts reset. That > or it boots in 66Mhz and then sets the clock chip after that. > > Anybody know what clock chip is on that board? Where to look for that chip? The board also has a system manager jumper: Selectable between the SuperIO chip (default) vs. the PIIX4E (southbridge). Wht is the meaning of this choice? I have the board description in pdf-format available if someone is interested. -- Svante Signell <[EMAIL PROTECTED]> _______________________________________________ Linuxbios mailing list Linuxbios@clustermatic.org http://www.clustermatic.org/mailman/listinfo/linuxbios
