Alex, What you have in that interface is a simple protocol translator ... translating bi-directional TN3270 to 3270 Data Stream. That is great to drive a 3270 dumb terminal.
The first thing you need is to emulate a real control unit ... like a 3174 or 3274. If you read the product letter: https://www-01.ibm.com/common/ssi/rep_ca/3/897/ENUS183-033/index.html "The 3290 utilizes microcode loaded from the IBM 3274 Control Unit to provide screen-management facilities for improved end-user ease of use." So, you need some microcode for the 3290, then you need to be able to load it to the 3290 on request from your OEC. Once you have that working, then the rest will kinda fall into place with the DFT functionality on the OEC. Joe On Mon, May 11, 2020 at 1:18 PM Alexander Huemer <[email protected]> wrote: > Hi > > I have a 3290 terminal that I'd like to put to some use. See email > thread 'Talking to 3270 terminals?' that I started Jan 14. > Somebody then pointed me to oec[1], which is an awesome project. I have > built the hardware interface that is required to talk to a 3270 terminal > on the hardware level. A picture of the interface and a video of the > terminal can be found at [2]. > > Now, the friendly person who created oec says that the 3290 is a so > called DFT (Distributed Function Terminal), in contrast to a CUT > (Control Unit Terminal). Most 3270 terminals seem to be of the (simpler) > CUT variant. oec only works with CUT terminals. Extending the > functionality to enable it to work with DFT terminals isn't trivial. > > Does anybody on the list here know of additional documentation besides > what's mentioned at [3] that could be helpful to implement DFT support? > > What would also be very helpful is a protocol trace of any kind of the > communication between a 3174 and a DFT terminal. > > -Alex > > [1] https://github.com/lowobservable/oec > [2] https://ahuemer.xx.vu/volatile/2020-05-11-P6C1Wc3u1wU/ > [3] > https://github.com/lowobservable/coax/blob/protocol/protocol/protocol.md > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
