FS debug mode should work in NAND slot1 type

DeSmuME 0.9.12 git#92924db x64-JIT SSE2
- compiled: Mar  4 2018 18:02:13

DirectX Input:
   - gamecontrol successfully inited: PC Game Controller
Microphone successfully inited.
DeSmuME 0.9.12 git#92924db x64-JIT SSE2
Attempting change to 3d core to: SoftRasterizer
SoftRast Initialized with cores=4

ROM game code: UORP
ROM crc: B184488A
ROM serial: NTR-UORP-EUR
ROM chipID: 00007FC2
ROM internal name: DSMIO
ROM developer: Nintendo
Found in game database by Serial:
        * ROM serial:           UORP
        * ROM save type:        FLASH 256Mbit
        * ROM crc:              76CA42A5

Load cheats: C:\Writ-App\Emulators\Nintendo - Nintendo DS\DeSmuME\Nightly\.\Cheats\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It).dct
Added 1 cheat codes
Slot1 auto-selected device type: Retail NAND
Slot2 auto-selected device type: None (0xFF)
BackupDevice: size = 256 Mbit
CPU mode: Interpreter
Already decrypted.
Loading C:\Users\User\Roms\Nintendo - Nintendo DS\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It)\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It).nds was successful
Emulation unpaused
snddx: emergency cleared sound buffer. (-11270, 0, 12005)
Slot 1: Retail DEBUG
sending eject signal to SLOT-1
Path to Slot1 data: C:\Writ-App\Emulators\Nintendo - Nintendo DS\DeSmuME\Nightly\.\Slot1D\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It)
Nitro File System:
        * FNT at 0x008A2400, size 0x0002B8A4
        * FAT at 0x008CDE00, size 0x00016AF8
        * ARM9 at Overlay 0x000D3A00, size 0x000006E0
        * ARM7 at Overlay 0x00000000, size 0x00000000
        * ARM9 exe at 00004000, size 000CF818h
        * ARM7 exe at 0087B200, size 00027130h
        * Directories: 328
        * Files 11615
        * ARM9 Overlays 55
        * ARM7 Overlays 0
Emulation paused

ROM game code: UORP
ROM crc: B184488A
ROM serial: NTR-UORP-EUR
ROM chipID: 00007FC2
ROM internal name: DSMIO
ROM developer: Nintendo
Found in game database by Serial:
        * ROM serial:           UORP
        * ROM save type:        FLASH 256Mbit
        * ROM crc:              76CA42A5

Load cheats: C:\Writ-App\Emulators\Nintendo - Nintendo DS\DeSmuME\Nightly\.\Cheats\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It).dct
Added 1 cheat codes
Path to Slot1 data: C:\Writ-App\Emulators\Nintendo - Nintendo DS\DeSmuME\Nightly\.\Slot1D\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It)
Nitro File System:
        * FNT at 0x008A2400, size 0x0002B8A4
        * FAT at 0x008CDE00, size 0x00016AF8
        * ARM9 at Overlay 0x000D3A00, size 0x000006E0
        * ARM7 at Overlay 0x00000000, size 0x00000000
        * ARM9 exe at 00004000, size 000CF818h
        * ARM7 exe at 0087B200, size 00027130h
        * Directories: 328
        * Files 11615
        * ARM9 Overlays 55
        * ARM7 Overlays 0
Slot2 auto-selected device type: None (0xFF)
BackupDevice: size = 256 Mbit
CPU mode: Interpreter
Already decrypted.
Loading C:\Users\User\Roms\Nintendo - Nintendo DS\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It)\WarioWare - Do It Yourself (Europe) (En,Fr,De,Es,It).nds was successful
Emulation unpaused
2D5C:[03359800, ofs 00000000] \data\Sound\DSMIO_NTR_Sound_EU.sdat
0942:[008E6600, ofs 00000000] \data\E\Common\LCFont_08.NFTR
0943:[008E7200, ofs 00000000] \data\E\Common\LCFont_10.NFTR
0944:[008E8400, ofs 00000000] \data\E\Common\MenuFont00_10.NFTR
095E:[0092FE00, ofs 00000000] \data\E\Data\MesgCommonW.bmg

Any version of WarioWare: D.I.Y (Japan, USA or Europe).

Start by reproducing the issue with WarioWare: D.I.Y. and inspect the Slot 1 handling shown in the log, including the Retail DEBUG device and NAND filesystem path. Determine the expected behavior for debug-mode NAND slot 1 across the Japan, USA, and Europe versions, then verify that each version loads and operates correctly.