-------- Forwarded Message -------- Subject: 3270 controller simulation Date: Mon, 18 Nov 2019 19:43:24 -0600 From: Andrew Kay To: aek at bitsavers.org Hi Al, I'm waiting for approval to join the cctalk mailing list but I heard on IRC you were interested in my project so hope you don't mind me reaching out to you directly. Unfortunately I don't have much in the way of useful documentation other than the code itself right now - I am planning on putting some documentation on the protocol together as well as a basic write-up on what I've discovered. Anyway - everything I've built so far can be found at https://github.com/lowobservable/oec and the linked projects (for the coax interface and TN3270 library). It's still pretty basic at this point but can do enough TN3270 and VT100 emulation to be usable. Here is a more recent photograph showing it connected to the Master the Mainframe server - https://i.redd.it/1kpbe3muvbz31.jpg. For the coax interface I'm using two obsolete ICs from National Semiconductor - the DP8340 and DP8341 and using an Arduino to connect these to a PC. I was really excited to see somebody on the mailing list mention they were working on an FPGA interface - building an interface that didn't depend on obsolete components is my plan for next year but I have to learn some electronics first. Please feel free to copy the above to the mailing list - I definitely want to join (do you know if it is possible to join with a GMail account, the last I heard was I was waiting to be approved), I had no idea there were so many people interested in 3270 things :-) Andrew