Morten and Peter managed to dump the internal rom of Dodonpachi Daioujou Tamashii, a Chinese release of Dodonpachi Daioujou on PGM2 hardware that offers an ‘easy’ mode.
extracting this one was more difficult (I’ll update this post / do a new post explaining why later)
unfortunately for now it also appears to expose some more bugs in the MAME ARM core, these are being looked into, but basically a lot of the sprites end up with a value of ‘0’ for palette selection instead of the correct value causing them to be rendered with incorrect colours. There are no additional video attributes being set so it seems logical to conclude it’s a CPU emulation problem at this stage.
Yes, the service mode really renders at the wrong orientation, bit lazy considering they didn’t have a bios to worry about and all the code is on the game boards.
*edit* MetalliC traced down the ARM CPU core bug and fixed it, resulting in correct colours. This also potentially improves things in the GBA driver.
This fix might not make 0.193 as it missed the deadline, so unless those in charge of the release decided that it’s important the 0.193 version will have broken colours shown above instead. *edit* Looks like the progress to fix the colours will be in 0.193, unless it gets backed out again at the last minute.
.. and a video of it running in MAME