Module Run entry confusion

Going by the PRM, the Module run entry is an offset in the Module. However, every 26bit Module I’ve come across that has a run entry, it’s an instruction. eg B &204

These seem to run correctly on RO3.x, so was this an undocumented feature or is the PRM wrong in stating it’s an offset?

In my PRM p1-206, the entry for the Start code (which is what is called by RMrun) says of the offset: This field need not be an offset. If not … it is assumed to be an instruction which is executed.

Thanks for confirming. I’ll create the Wiki page for future reference.

I’ll create the Wiki page for future reference.

No need.

I started this ages ago: https://www.riscosopen.org/wiki/documentation/show/File%20formats:%20Relocatable%20Module
It hasn’t been finished as I’m not just copying out of the PRM or the like, I’m working through the code to see what RISC OS actually does in each case. That’s harder. And takes time I don’t have a lot of. :-/

Anyway, it says there that an offset that isn’t a feasible valid offset (eg larger than the module) will be assumed to be an instruction.