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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 ==