I'll edit this post each time I'm done with one of the steps of the process described in ./1.

[ul][li]Successful second transfer of PedroM 0.82 RC11 to AMS 3.10 using DirectLink, boot OK. My 89T is a HW4, BTW.[/li]
[li]Keyboard drivers OK. I noticed that the auto-repetition behaviour is slightly different from that of AMS 2.05 on 89 HW2 (auto-repeat works on PedroM 0.82 RC11 89T with alpha-lock on, it doesn't on AMS 2.05 89), but that would probably be a feature IMO.[/li]
[li]Turning the calculator off and back on works, and auto power down works.[/li]
[li]Variable tests OK (creation, archival, reset, erase, recovery), tests deeper than those of ./1.[/li]
[li]Battery indicator not tested, I don't have used AAA batteries for now. But ttbatt runs properly.[/li]
[li]Link tests: mostly OK. Archived files and unarchived files are correctly detected. TILP SVN refuses to delete a file because it didn't detect an AMS 2.09. We talked about that a bit at topics/123598-tilp2-crash-dans-la-reception-des-fichiers/5 , so either PedroM doesn't advertise itself as AMS 2.09, or TILP/libti* doesn't understand PedroM.[/li]
[li]Further link tests such as sending a group file taken from another calculator: failure with "Link: VAR" for files that were archived on the calculator they were received from. Editing the group file to remove those attributes makes it possible to transfer those files.[/li]
[li]running various uncompressed or compressed AMS native programs (some of them without startup code): OK. I could see that my 89 HW2 contains outdated binaries (e.g. an eBook Reader that doesn't support PedroM, several programs that don't support grayscale on 89T)[/li]
[li]computing 1000! in zs: OK[/li][/ul]