On Fri, Jun 27, 2008 at 01:15:32PM -0400, Joseph Smith wrote: > > You will find two PLX Technology NET 2270 chips and a microcontroller > > (I'm not sure which micro it was, maybe Ubicom SX) responsible for > > configuration and data flow control in the NET 2270s. > > > > http://www.plxtech.com/products/net2000/ > > Is the datasheet publicly available?
Yes, but you have to register on their web site. > >> I'll bet anyone all the electrical components inside that little > >> box can be purchased for less than 20 dollars. > > > > In which quantity? > > Maybe when I figure it out, I will buy a big batch and sell them > cheaper to those interested:-) Even if you have to buy 1000 pcs? > > So, you will have to reverse engineer the microcontroller software, > > and re-engineering a software that does what the NET20DC does. > > So is there some kind of memory device with the "microcontroller > software"? Like a eprom or eeprom?? I expect it to be stored in internal memory in the microcontroller package. I'll open my device up if I can find it to check if I remember correctly about the Ubicom. > > You will be learning a lot about USB - which I think is a great idea! > > Good, than maybe this little side project will work out great for > everyone. Maybe I will learn so much about USB I will be able > contribute else where; like filo, GRUB2, and LegacyBIOS :-) USB has strict distinction between hosts and devices. This is a fundamental design decision detailed pretty well in the spec. In order to create your own Debug Class device you need to learn a lot about devices and almost nothing about hosts. When writing a USB stack for the host one needs to learn everything about the Host Controller and almost nothing about devices. > Also, another question about this topic. I read somewhere someone > was working on a Linux Kernel driver for the NET20DC for the host > PC. Did this ever implimented? Can you use the NET20DC in linux on > a host PC? Yes. > If so, how does it work? USB serial port. CONFIG_USB_SERIAL_DEBUG enables the driver. //Peter -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
