PTM Savegame

From 3dbrew
Jump to navigation Jump to search

This page describes the contents of the PTM module savegame FS.


This contains the log of the total steps taken per day. Each entry contains an u32 timestamp and an u16 for the total steps.


This contains the play log for every title (including the Home Menu and some system applets) launched on the system. The first entry in the file is the oldest, the last entry is the newest. The file is always 0xD5DE8 bytes long, regardless of how many entries are in the file. There can be no more than 0x11D28 entries.

Offset Size Description
0x0 0x4 Start entry index.
0x4 0x4 Total PlayHistory entries.
0x8 0xD5DE0 0x11D28 PlayHistory entries, 0xC-bytes each.

Entry Structure[edit]

Offset Size Description
0x0 0x4 TitleID-high
0x4 0x4 TitleID-low
0x8 0x4 Log info (Bits 1-4) and Timestamp (Bits 5-32)

The first 4 bits in each entry after the TitleID are used for holding information relating to what the log event represents. After this, all log entries are marked with a 28-bit timestamp, measuring the number of minutes since 2000-01-01. The theoretical maximum timestamp value is 2510-05-20 12:15:00.

Regular Log Entries[edit]

Most log entries represent an action in relation to a specific TitleID. In this case, the lower 3 information bits are individual flags that determine the exact action that was taken with the title. The 4th bit is always 0 here. From least significant bit to most, they have the following meanings:

Bit General Meaning When 0 When 1
1 Whether the event represents an opening of something or the closing. opening closing
2 Whether the app in question is a Home Menu applet (e.g. the menu itself, game notes, etc.) or a full application (e.g. any game, system settings, etc). full application applet
3 Whether the event corresponds to a resume/suspend or a launch/quit (suspend meaning going to the Home Menu without fully quitting an app). launch/quit resume/suspend

Some examples (binary numbers are written with the most significant bit first):

Bits Meaning
0000 Application was freshly launched
0101 Application was suspended, but not closed (play time is paused)
0100 Application was resumed after being suspended (should not increment No. of Times Played in Activity Log)
0001 Application was fully closed
0010 Applet was freshly launched
0111 Applet was suspended, but not closed
0110 Applet was resumed after being suspended
0011 Applet was fully closed

Special Log Entries[edit]

Entries with TitleID FFFFFFFFFFFFFFFF (8 0xFF bytes) correspond to special log events regarding the whole system, not just a single title. All 4 information bits are used and should be interpreted as one number, not as flags. They have the following meanings (binary numbers are written with the most significant bit first):

Bits Meaning
0000 DS(i) backwards compatibility mode started
0001 DS(i) backwards compatibility mode ended
0111 Unknown, occurs just before "SAFE_MODE System Updater" launches
1000 Sleep mode started
1001 Sleep mode ended
1010 3DS services stopped (happens at shutdown and also when launching DS Mode apps)
1011 Start of system clock change (timestamp corresponds to original time)
1100 End of system clock change (timestamp corresponds to new time)

Common Log Entry Patterns & Other Notes[edit]

  • When the system boots into the Home Menu, it will make an initial log that the Home Menu was launched (0010).
  • When a 3DS application is started, the Home Menu is first logged as suspended (0111), then the application is logged as launched (0000).
  • When a 3DS application is suspended, it is logged as such (0101), then the Home Menu is logged as resumed (0110).
  • Closing a 3DS application usually involves suspending it first, so closing an application will often follow the pattern: Application suspended (0101), Home Menu resumed (0110), Application closed (0001).
  • Applications that close themselves without suspending first are logged as doing so (0001), then the Home Menu is logged as resumed (0110).
  • The Home Menu fully closes before applets are launched, so starting an applet then closing it usually follows the pattern: Home Menu closed (0011), Applet launched (0010), Applet closed (0011), Home Menu launched (0010). Applets do not usually get suspended (with the exception of the Home Menu). Currently suspended applications do not get closed when an applet is launched.
  • When the system is powered off, a special log entry with bits 1010 is written, even if no applications are currently running.
  • Applications will usually have a log entry created specific to their TitleID to signify their closure (0001) if they are still running when the system is powered off. This comes before the special log entry with bits 1010 is written, however does not always happen, and never happens for the Home Menu. As such, a special log entry with bits 1010 should be used as a sign to consider all 3DS applications terminated.
  • Starting a DS(i) application logs the TitleID launch as normal (0000), but then also results in a special log with bits 1010 to be written (the same as when the system is powered off). This signifies that any and all running 3DS applications (including the Home Menu) have been terminated. A special log with bits 0000 is then written immediately afterwards, signifying the start of the DS(i) application running. Once the DS(i) application is closed, a special log with bits 0001 is written, signifying that the running application has stopped. DS(i) applications do not get a closure log specific to their TitleID written. If the DS(i) application is closed to the Home Menu, the Home Menu will be logged as freshly launched (0010) after the 0001 special log. If the power is turned off while a DS(i) application is running, the Home Menu will still be logged as launched, but it will be immediately followed by a 1010 special log.
  • Occasionally, stray/unexpected logs do occur. These usually involve logging an application as entering a state its already in, for example: logging an application as suspended when it's already been suspended, logging as application as closed when it wasn't open, logging an application as resumed when it wasn't suspended, etc. These are usually safe to ignore, and most commonly afflict the Home Menu TitleID.
  • Entering sleep mode does not, on its own, cause open apps to be logged as suspended.