View source for Phtcache.bin

== File Header ==
{| class="wikitable" border="1"
|-
! Offset
! Size 
! Description
|-
| 0x0
| 0x8
| Always "1UJQ00_1"
|-
| 0x8
| 0x4
| Number of Pictures + 1
|-
| 0xC
| 0x2
| Total number of photo entries(including unused entries) stored here, this is normally value 3000 (500 on NAND).
|-
| 0xE
| 0x2
| This u16 must be < 2, this is normally value 1 (0 for NAND).
|-
| 0x10
| 0x2
| Unknown, normally value zero.
|-
| 0x12
| 0x2
| Total number of photos(used entries), excluding 2D dups.
|-
| 0x14
| 0x2
| CRC16 over the entire file with this CRC field set to zero when calculating the CRC, with initialval=0 and polynomial=0xA001.
|-
| 0x16
| 0x2
| Size of this header, must be >=0x18(this is always value 0x18).
|-
| 0x18
| 0x98 * Number of Pictures
| Pictures Property, index refereed by 3DS Camera
|}

The phtcache.bin actual filesize must be at least the following size: hdrsizefield + totalstoredentries*0x98.

== Pictures Property ==
{| class="wikitable" border="1"
|-
! Offset
! Size 
! Description
|-
| 0x0
| 0x04
| Null-terminated file extension: MPO, JPG, or AVI.
|-
| 0x4
| 0x8
| Image file name, without the extension.
|-
| 0xC
| 0x8
| Directory name under the DCIM directory.
|-
| 0x14
| 0x4
| Time taken based on "DS epoch" (start of 1/1/2000) (UNIX+946684800)
|-
| 0x1C
| 0x4
| Time last viewed?
|-
| 0x24
| 0x4
| ?
|-
| 0x28
| 0x4
| ?
|-
| 0x2C
| 0x4
| ?
|-
| 0x30
| 0x4
| ?
|-
| 0x34
| 0x4
| ?
|-
| 0x38
| 0x4
| ?
|-
| 0x3C
| 0x4
| ?
|-
| 0x40
| 0x4
| File size
|-
| 0x50
| 0x18*4
| 4 blocks, where each block is 0x18-bytes.
|}