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no edit summary
In CacheD.dat, the icon data is concatenated together, with the first icon at offset 0x0.
In CacheD.dat, the icon data is concatenated together, with the first icon at offset 0x0.
== [[Home_Menu/Themes|Theme]] cache SD [[Extdata|ExtData]] ==
The SD ExtData [[Extdata#Filesystem|File System]] for the [[Home_Menu/Themes|theme]] cache is as follows:
root
├── icon
├── boss
└── user
├── BodyCache.bin
├── ThemeManage.bin
└── BgmCache.bin
{| class="wikitable" border="1"
|-
! File
! Details
! Size
! FW Introduced
! Plaintext
|-
| BodyCache.bin
| Contains cached data from the last loaded [[Home_Menu/Themes|theme]] RomFS body_LZ.bin file.
| 0x150000
| [[9.0.0-20]]
|
|-
| ThemeManage.bin
| Theme management info. Home Menu reads the first 8-bytes during startup, it's unknown what the rest is used for.
| 0x800
| [[9.0.0-20]]
|-
| BgmCache.bin
| Contains cached data from the last loaded [[Home_Menu/Themes|theme]] RomFS bgm.bcstm file.
|
| [[9.0.0-20]]
|}
This is the theme cache, for the currently used theme. This is loaded by Home Menu during startup.
== Savedata and extdata loaded by Home Menu during startup ==
The following is from [[9.4.0-21]], in the same order Home Menu does it.
{| class="wikitable" border="1"
|-
! Archive
! Filename
! Read size
! Notes
|-
| Home Menu [[System_SaveData]]
| "/Launcher.dat"
| 0x2490
|
|-
| NAND [[extdata]] 0xf000000b
| "/ubll.lst"
| 0x2ee0
|
|-
| NAND extdata 0xf000000b
| "/CFL_OldDB.dat"
|
| Home Menu just closes this file immediately after opening it, when opening it was successful at least.
|-
| NAND extdata 0xf000000b
| "/CFL_DB.dat"
| 0xe4c0
| Home Menu only does one read with size 0xe4c0 for this, even though the value it loads from [[FSFile:GetSize]] is larger than that.
|-
| NAND extdata 0xf000000b
| "/gamecoin.dat"
| 0x14
| This is for loading the file containing play-coins info. Immediately after reading this file, Home Menu then uses [[FSFile:GetSize]], then Home Menu writes to gamecoin.dat for updating the date data.
|-
| NAND [[extdata]] 0xf000000c
| "/bashotorya.dat"
| 0x2ee0
|
|-
|
|
|
| Here, Home Menu opens the following SD extdata archives, with the following extdataIDs(unknown if these extdataIDs are valid for non-USA): 0x000014d1(normally opening this fails with error 0xc8804464), Home Menu SD extdata, and 0x000002cd(theme cache).
|-
| Home Menu SD extdata
| "/SaveData.dat"
| 0x2da0
| Prior to doing the read, Home Menu uses [[FSFile:GetSize]].
|-
| Home Menu SD extdata
| "/Cache.dat"
| 0x1688
| Prior to doing the read, Home Menu uses [[FSFile:GetSize]].
|-
| Home Menu SD extdata
| "/CacheD.dat"
| 0x36c0
| This is used to read the cached icon data for the currently inserted gamecard, if any.
|-
| SD extdata theme cache
| "/BodyCache.bin"
| 0x150000
| Before opening the file, Home Menu firsts opens this archive under a new archive-handle again, then closes it. Prior to doing the read, Home Menu uses [[FSFile:GetSize]].
|-
| SD extdata theme cache
| "/ThemeManage.bin"
| 0x8
| Prior to doing the read, Home Menu uses [[FSFile:GetSize]](the result is filesize 0x800).
|-
| SD extdata theme cache
| "/BgmCache.bin"
|
| The data is read from here as needed.
|-
| NAND extdata 0xf000000b
| "/gamecoin.dat"
| 0x14
| Home Menu loads the file data here, then writes it to the file again without changing it.
|-
| Home Menu [[System_SaveData]]
| "/Launcher.dat"
|
| Home Menu writes 0x2490-bytes to the file here.
|-
| NAND extdata 0xf000000b
| "/idb.dat"
| 0x2008
| This firsts opens the file for writing, then uses [[FSFile:GetSize]](output filesize is 0x6d4000). Then it writes to the file using size 0, then closes the file. Then Home Menu re-opens the file, then does the actual read.
|-
| NAND extdata 0xf000000b
| "/idbt.dat"
|
| Home Menu writes 0x2008-bytes to this file.
|-
| NAND extdata 0xf000000e
| "/versionList.dat"
| 0x18a0
| Prior to doing the read, Home Menu uses [[FSFile:GetSize]].
|-
| Home Menu [[System_SaveData]]
| "/Launcher.dat"
|
| When Home Menu is terminating(?), Home Menu writes 0x2490-bytes to the file here. After doing this, Home Menu opens, writes, and closes the file again.
|}
== See Also ==
== See Also ==