Kent A. Reed wrote: > On 10/1/2011 9:43 PM, Jon Elson wrote: > >> Well, MUCH more interesting! I hadn't tried EMC, as I couldn't get my >> diagnostics to work. But, I eventually tried EMC2, and it DID work! >> After that, my diagnostic program ALSO worked. So, apparently the >> port management routine knows how to map to the ECR register >> and select EPP mode. I will tinker some more with this to see if I >> can find the magic that lets the EMC driver do it right. >> >> Jon >> >> > Cool, Jon. Maddening, but cool. > > I asked Google about the OX9162 chip and came up with > http://pdf1.alldatasheet.com/datasheet-pdf/view/161706/OXFORD/OX9162.html > > This data sheet is dated 1999! > > The language concerning EPP mode-setting is exactly the same as I quoted > from a more recent chip's sheet, and your finding here seems to confirm > that everything is laid out is a reasonable fashion. > > Thanks for the datasheet. Page 22 shows the standard register layout, with the ECR at 402 above the base register, but clearly PCI PnP did NOT set up the board in that configuration on the D525MW, it packed the address ranges together. > I can't wait to hear what causes this peculiar 'it doesn't work, no, > wait, now it does' behavior. > > And now if we could just figure out Kirk's problem. > I don't know whether other EMC2 drivers properly handle this arrangement of the registers, or even if they are different in other systems. I think the PnP enumeration is done by the BIOS, not the OS. I wasn't clear if this was an EPP problem or not. I know that when I tried the D510MO mobo, it did not work on one of my boards, and I had to make an update to the firmware. So, there is a timing difference on at least the D510MO. Maybe the new SIIG boards also have different timing, which could affect various EPP target board implementations.
Jon Jon ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
