Some of this convo is split up on different forums as different questions get asked of potentially different audiences. Some relevant thread links: https://forums.jag-lovers.com/t/zytek-ecu-model-number/382369 (Did a bunch of parts documentation there) https://forums.jag-lovers.com/t/zytek-software-...

/1 of your post is already done. The XJRS software is available and runs in a DOS box under W2k or earlier - no Toshiba laptop needed. That's good to know Marekh. Any idea where that's available to look at/copy? I suppose one place to start IDing ECMs is to put the word out here, JagForums, and som...

Usually I spend time on the XJS forums/groups and sometimes wind up trying help XJRS owners w/ issues. I ran across this post looking for any data on the Zytek diagnostic systems. It's weird that more info hasn't become more readily available. So much has been released or backwards engineered for ol...