jeshua wrote: > I am looking at the data sheet for that chip: > > http://www.datasheetarchive.com/OX16PCI952-datasheet.html# > > It states on page 52: > > To use the Enhanced Parallel Port (‘EPP’) mode, the mode > field of the Extended Control Register (ECR[7:5]) must be > set to ‘100’ using the negotiation steps as defined by the > IEEE1284 specification > > … > > The register set is compatible with the Microsoft(R) register > definition. Assuming that the upper block is located 400h > above the lower block, the EPP registers are found at > offset 000-007h and 400-402h. > > > Does anyone know what that actually means? Its a bit over my head. > OK, that says there is a set of three registers that should be at address 0xc450 - 0xc452, but these do not show up in your lspci output. Possibly the board remaps the chip's addresses to some smaller range. I'm not sure how much farther you can go with this. If the maker of the board has deliberately violated the standard device register map, it is going to be quite hard to find out where they moved them.
I do note that they say bit 0 of the ECR register must be a 1, my pcisetup program writes a zero there - it writes 0x80 to the ECR. Probably this program should actually mask and write 100xxxxx to the register. I do have the source code online, if you want to try that. Also, does this board have the serial EEPROM? It would be a 93C46 or 93C56-compatible device, and probably a really small chip, no more than 8 pins. That EEPROM can be programmed by a utility to remap the PCI addresses and enable/disable various functions. If it has the EEPROM (and I'm guessing it does) that would explain the different register mapping. You might look for the config program and see about changing the default settings for the board. You very likely would need a Windows machine to use the program. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
