portalDS fails to boot

[44670]

The game is available at: https://github.com/smealum/portalDS

It fails to boot with the latest code in master branch, but was workable on 0.9.2.

Logs collected:

RTC INTERRUPT ON: 41
unknown ARM9 IO read32 04004000 0204F654
NDSCART: !! BAD TRANSFER DIRECTION FOR CMD B7, DIR=0, ROMCNT=E97F3FFF```

[Arisotura]

same issue as the Bad Apple demo. it needs proper DLDI support (ie being able to find its own ROM inside the DLDI device). otherwise it falls back to a broken NitroFS driver.

[44670]

same issue as the Bad Apple demo. it needs proper DLDI support (ie being able to find its own ROM inside the DLDI device). otherwise it falls back to a broken NitroFS driver.

I have tried the game with melonDS 0.9.2 with DLDI disabled, the game boots and it's playable.

Maybe it is affected by one of the recent commits?

[Arisotura]

the broken NitroFS driver only worked because the cart-interface implementation in older melonDS was inaccurate (allowed reads with the WR bit set, which does not work on hardware).

[44670]

I see, thanks for explaining this!

[Arisotura]

you're welcome :P

[44670]

btw I'm working on a WebAssembly port of this emulator, here is a demo if you are interested:
https://44670.github.io/melonDS-wasm/wasm-port/

[PH111P]

the broken NitroFS driver only worked because the cart-interface implementation in older melonDS was inaccurate (allowed reads with the WR bit set, which does not work on hardware).

In particular, static void nitroSubReadBlock(u32 pos, u8 *ptr, u32 len) from said driver might be the root cause for this problem: https://github.com/devkitPro/libfilesystem/blob/master/source/nitrofs.c#L169 Note the CARD_WR flag. I'm not really sure why they are setting that—it should just work without.

[AntonioND]

I've just hit this problem! I was trying to read from the cartridge, and copied the routine to read blocks from nitroFS...