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.

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.

The communication processor is updated through the use of the SceDeci4pCpup module.

Here are the different CP versions identified as of today:

CPUP Header	Version	Firmware
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

The Kernel Boot Loader outputs the current CP version in the console, this follows the below standard:

Board.id ver.version

for example "bid.4 ver.1301" stands for board id 4 CP version 1301 DEM-3000H uses the CP board id 3 PDEL-1001 uses the CP board id 4

Note: The Communication Processor on PS Vita Development units is not downgradable within normal operations (even when downgrading the unit itself using a PUP).