Communication Processor Update Package
Updates to the communication processor are stored within a special CPUP package contained within Development kit (DEM or PDEL) PUP files.
In firmware .940 and .945 (and their subsets) exclusively, the CPUP are embedded within encrypted Update Packages.
CPUP Structure
Each CPUP shares a common header.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | MAGIC (CpUp in Little Endian) |
| 0x4 | 0x4 | Version (in Little Endian) |
| 0x13 | 0x1 | Unknown, always 0x01 |
| 0x14 | 0x4 | Full CPUP Size (in Little Endian) |
| 0x18 | 0x1 | Unknown, always 0x20 |
| 0x1C | 0x4 | Extracted/Decrypted CPUP size (in Little Endian) |
Every CP updates below version 1000 (found in firmware 1.00) are divided in 2 parts (2 separate CPUP files set to the same version value).
Every version after version 1000 is only comprised of a single part.
CP board id
- DEM-300xH has the CP board id 3
- PDEL-100x has the CP board id 4
CP version
Here are the different CP versions identified as of today:
| CPUP Header | CP Version | System Software Version |
|---|---|---|
| 00060004 | 0604 | 0.902 |
| 00080508 | 0858 | 0.931 |
| 00090100 | 0910 | 0.940 |
| 00090203 | 0923 | 0.945 |
| 00090501 | 0951 | 0.990 |
| 00090600 | 0960 | 0.995.000 |
| 00090700 | 0970 | 0.995.070 |
| 00090708 | 0978 | 0.996 |
| 01000000 | 1000 | 1.000 |
| 01000001 | 1001 | 1.030 |
| 01000002 | 1002 | 1.040 |
| 01000106 | 1016 | 1.500 |
| 01000300 | 1030 | 1.600 |
| 01000800 | 1080 | 1.800 |
| 01010000 | 1100 | 2.000 |
| 01010702 | 1172 | 2.120 |
| 01010904 | 1194 | 2.500 |
| 01020001 | 1201 | 3.000 |
| 01030001 | 1301 | 3.100 |
Kernel Boot Loader logs
The Kernel Boot Loader outputs the current CP version in the console, this follows the below standard:
Starting PSP2 Kernel Boot Loader [0x%08x]: %d...revision : %d.build date : %s.....cp info. : bid.%x ver.%04x
Where bid. is the Board id and ver. is the CP firmware version For example "bid.4 ver.1301" stands for board id 4, CP version 1301
Update
The Communication Processor is updated through the use of the SceDeci4pCpup module.
Downgrade
Note: The Communication Processor on PS Vita Development units is not downgradable within normal operations (even when downgrading the unit itself using a PUP).