what kind of solder and what temperature on the iron, to work on those SRAM modules? I just threw one away because I couldn't work with it.
On Thu, Jan 3, 2019 at 9:14 AM Stephen Adolph <[email protected]> wrote: > Hi, > REX on M10 has been put aside for the near term. I encountered some > issues that need a deeper debug, so it was more time than I had available. > It was partially successful. I could read and write data into the flash, > but for some reason it would not successfully run the test applications. > Steve > > On Thu, Jan 3, 2019 at 8:22 AM <[email protected]> wrote: > >> Hi Everyone, >> hope you had a great vacation and I wish you all a Happy 2019. >> >> Repairing my Olivetti M10 ( almost the same hardware of the TRS 80 Model >> 100 ) I found 2 broken SRAM modules out of 3 and I wondered if I could >> restore the modules identifying each broken IC in the modules. >> >> I put toghether a super simple SRAM Tester with ArduinoMega 2560 and as a >> gift to the community and to thank you all for the support in my likely >> Olivetti M10 repair, I would like to share my little project. >> >> Below you will find a link with some picture of how to put it together >> and the Arduino code to test it. >> Please let me know if you will find this usefull or if you have a better >> simpler method to identify the bad IC in a module (I tried using a TL866 >> programmer with no luck). >> >> BTW, I succesfully identified the IC that were failing on my modules, >> removed it from the ceramic substrate and restored one module out of 2!!!! >> Now my Olivetti M10 is working fine with 2 SRAM modules. >> If some of you have some spare/broken SRAM modules and don't need it, >> please let me know. >> >> I think Stephen Adolph was developing a ROM to use the REX on the M10, >> any news on this? >> >> Mauro >> >> https://photos.app.goo.gl/BDe8EJDvscTuzViX8 >> >> >> Since I can't attach files here, this is the link to the EEVBlog forum >> where I posted my repair adventure and the code for the SRAM tester >> >> >> https://www.eevblog.com/forum/repair/challenge-learn-something-new-from-something-really-old/ >> >> >> >> >> Con OpenStar hai Giga, SMS e i minuti che vuoi da 4,99€ al mese, per >> sempre. Cambi gratis quando e come vuoi e in più hai 10€ di credito omaggio >> e 6 mesi di INFINTY! http://tisca.li/myopen >> >>
