Ok I would definitely get new boards. That is from even before the "old but still ok" version I thought you must have had.
I think that one is ok electrically but really that was just my first shot at importing Steve's original Eagle files into KiCAD. The problems with it are the silkscreen is obviously all messed up. There is no good way to provide power to the board for flashing the cpld (I used an actual socket, you will have jerry rig something with maybe rubber bands holding wires on the pins 1 & 14 edge connectors). There is no good way to hold port_en high to flash the cpld. (you have to clip a jumper to the vcc pin on the jtag and hold the other end manually touching the side of a resistor, and if you brush the wrong side of that same resistor, you poof the 3.3v regulator, and operate a laptop while holding that jumper wire in place...) I do think it's electrically the same as Steve's original, just with messed up silk screen. So, you *could* follow the old directions on the wiki to see where to touch the jumper wire to hold port_en for programming. The current directions include a link to the old directions. You'll have to look at the pics to tell which jtag pins are which too I guess. The arrangement hasn't changed, so an old picture that shows where tdi, tdo, tck, etc are, it's the same position on yours. I mean, I would even rather send you a few of my own left over boards than see you use that board. They are left over. I don't sell REX's or anything so once I was done testing the updated designs and done building the couple I need, the rest of the boards are just left over after that, doing nothing. And I didn't have any carrier at that time so I guess that means you didn't get any version of a carrier. The original rex and this one was still just using paperboard and ribbon glued to the bottom. You could do that original spacer & ribbon, but I think you can actually get that version into the current carrier which would be better (safer from mangling your socket pins) than the spacer & ribbon. The chips and other components are the same, so you could just order the current boards for $6 and a carrier for another $6, and the rest of the parts you already have, if you didn't want to take my free left over ones. I don't know if I have leftovers of the very last version, but several versions before that were basically the same and would be fine. I think you would get mine faster too since it would just be the mail, no manufacturing. -- bkw On Sun, Jun 21, 2020, 8:29 AM Charles Hudson <[email protected]> wrote: > Brian, > > Attached pic shows the REX board I obtained last year. > > -CH- > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> > Virus-free. > www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> > <#m_-5685505497623102292_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >
