20260905

[dleicht]

This release implements proper GBA (SWI 03h) and 3DS (PDN) sleep modes.

It does so by persisting the 32‑byte BIOS vector overlay, including the SWI instruction.
After GBA is stopped, the 3DS will then gracefully shut down its gfx and audio pipelines and set CORES 0 and 1 into the low power DORMANT state, initiating the low power PDN sleep.

Depending on your hardware, sleep modes are triggered by closing the lid (O3DS up to N3DSXL) or the manual sleep switch (O2DS).

On lid open, or resetting the sleep switch, the cores are fired up, gfx and audio pipelines are rebuilt, and GBA will resume normal gameplay.

Earlier concepts of dynamically patching a sleep handler into the rom image have been abandoned because they are superseded by this.

Key features:

• low power sleep mode in virtually every GBA game
• no changes to the game rom or memory
• ips patches supported as usual
• reuse of existing original code structures as much as possible

Battery life:

#	profi200	domi
battery drain	12 %/h	1,5 %/h
battery life	~ 8 hours	~ 3 days

---

This discussion was created from the release 20260905.

[Rhlp-Engineering]

oh heck yeah 3 days! DONKEY KONGGG!!!

[dleicht]

I just did another 10 hours battery test with this exact build. Went from 95 % to 82,5 %.

That's 1,25 %/h.