Mark

Based on the log text in the example, perhaps that was a standard feature of the default Trace duplication scripts? So some Amiga/Mac/whatever disks could possibly contain similar info. [Maybe...

I don't think it's documented as such, though the (assembly-language) source is available: http://www.whdload.de/whdload/Tools/MFMWarp_src.lha

The first program I found this instruction sequence in was [PackDev](https://aminet.net/package/util/arc/PackDev1_9). Its [source code](https://aminet.net/package/util/arc/Packdev1_9src) is available for reference. I think there's only one instance in that particular program, which is...

Try running ReSource with -R and -S options. -R causes it to open a screenmode requester (maybe choosing a native mode might help?), and -S causes it to use system-friendly...