Maybe the board can only read the first 16K of the 32K eprom? markus@infoscape.com wrote: > netsol,matthew writes: > > I ran the rom-scan at dos, it says: > > Found ROM header at C800:0000; anounces 32k image (27c256 EPROM) > > This message would suggest, that you properly installed and configured > the EPROM. I just double-checked with the source code for rom-scan and > I could not think of any hardware problem that might still go > undetected (please, correct me, if anyone can think of anything else > that rom-scan should check for). > > This is a list of other things, that I can imagine as having an effect > on how your machine detects ROM extensions: > > 1) there are other ROM extensions that take effect earlier and > override whatever the BOOT-Prom is trying to do. A typical > candidate for this, would be a SCSI host adapter; but if there is > one, you should see it in the rom-scan output. > > 2) your computer has problems with the way that the BOOT-Prom is > hooking into system vectors. If you are using "etherboot", you > could try defining NOINT19H in the configuration file and then > rebuilding the boot image. While this change introduces a couple > of other problems and is thus not generally recommended, it might > help in your case --- if it does help, then please check that > afterwards, the machine is running at full speed and that you can > access all PCI devices; there are BIOS versions out there, which > do not fully initialize the hardware if NOINT19H is set. > > 3) just to make sure, that you are not seeing a problem with weird > PC motherboard design, you should also try moving the EPROM base > address to some higher location (e.g. D800:0000). > > 4) can you please confirm, that the above line is the *only* output > you get from rom-scan. Can you repeatedly run rom-scan and still > see the same message? If it does not work all the time, your > EPROM might have an access time that is too long; it should > probably have something around 120ns. > > 5) check your system BIOS if it has any switches that might enable > ROM extensions, caching for ROM extensions, shadowing, or any > such thing. Play around with these options. > > 6) if none of the above helps, try posting as much information as > possible about your machine. Maybe, someone else has a good idea > when he sees a summary of your configuration. > > Good luck, > > Markus > > -- > Markus Gutschke Internet: markus@infoscape.com > Infoscape, Inc Phone: +1-415-537-3778 > 657 Mission Street, Suite 200 > San Francisco, CA 94105 > > Disclaimer: The above message represents my personal opinion; It does > not constitute an offical statement by Infoscape! > > ------------------------------------------------------------------------ > > Part 1.2 Type: application/pgp-signature > Encoding: 7bit -- Mike rushford@wenet.net http://www.hooked.net/~tvs/eyes/ http://www.hooked.net/~tvs/members/mike_rushford.gif
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