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EAP could stand for External Application Processor.
EAP could stand for External Application Processor.


The role of EAP is to handle media (online [[Wireless]]/[[GbLAN]], [[Bluray Drive]] and [[HDD SSD|HDD/SSD]]) even when the PS4 is in standby mode. EAP runs its own FreeBSD kernel in standby mode, activated to handle tasks such as downloading games updates while the PS4 is in standby.
The role of EAP is to handle media (online [[Wireless]]/[[GbLAN]], [[Bluray Drive]] and [[Harddrive]]) even when the PS4 is in standby mode. EAP runs its own FreeBSD kernel in standby mode, activated to handle tasks such as downloading games updates while the PS4 is in standby.


It handles several tasks to offload the [[APU]]:
It handles several tasks to offload the [[APU]]:
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EAP Core is the only usermode executable running on EAP. It is stored unencrypted as SceEapCore.elf in PS4 HDD.
EAP Core is the only usermode executable running on EAP. It is stored unencrypted as SceEapCore.elf in PS4 HDD.
==== EAP Filesystem from EAP Kernel binary ====
<pre>
/dev/
/eap_tmp/
/eap_user/
/eap_vsh/
/minila/
/minila/minila
/rescue/
/update/
/user/
</pre>
==== EAP files on HDD ====
* da0x2 HDD partition is mounted to /eap_kern/ but is encrypted. Only EMC Kernel Boot Loader reads and decrypts this partition then loads it in EAP DDR3 memory and launches EMC Kernel.
* da0x3 HDD partition is mounted to /eap_vsh/.
<pre>
/eap_vsh/common/
/eap_vsh/common/cert/
/eap_vsh/common/cert/CA_list.cer
/eap_vsh/etc/
/eap_vsh/etc/bgdc/
/eap_vsh/etc/bgdc/config.xml
/eap_vsh/etc/timezone.dat
/eap_vsh/SceEapCore.elf
</pre>
==== EAP files on Serial Flash ====
<pre>
sflash0s0x33: SLB2 container
sflash0s0x33/C0010001: EMC Kernel Boot Loader
sflash0s0x33/C0018001: EMC Kernel Boot Loader Information
</pre>


== Southbridge RAM ==
== Southbridge RAM ==


Southbridge chip is connected to its own DDR3 SDRAM. It is named "sbram" as abbreviation for SouthBridge RAM.
Southbridge chip is connected to its own DDR3 SDRAM. It is named "sbram" as in SouthBridge RAM.


=== PS4 Fat and Slim ===
=== PS4 Fat and Slim ===


PS4 Fat and Slim Southbridge has access to one 2Gb DDR3 chip, for a total of 256MB of memory.
PS4 Fat and Slim Southbridge has one Samsung [[K4B2G1646E-BCK0]], [[K4B2G1646F-BCMA]] or [[K4B2G1646Q-BCMA]], giving a total of 256MB of memory.


=== PS4 Pro ===
=== PS4 Pro ===


PS4 Pro Southbridge has access to two 4Gb DDR3 chips, for a total of 1GB of memory.
PS4 Pro Southbridge has two Samsung [[K4B4G0846E-BYMA]] or [[H5TQ4G83CFR-RDC]] ([[K4B4G1646E-BYK0]] on PS4 Pro DevKit), giving a total of 1GB of memory.


== Serial Flash ==
== Serial Flash ==
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= Southbridge revisions =
= Southbridge revisions =


There are three major hardware revisions of the PS4 southbridge, named Aeolia, Belize and Baikal.
There are three major hardware revisions, named Aeolia, Belize and Baikal.


See also [[Aeolia]].
See also [[Aeolia]].
== Motherboards per Southbridge revisions ==
{| class="wikitable sortable"
|-
! Southbridge Codename !! Southbridge Labeling !! Motherboards
|-
| [[Aeolia]] || [[CXD90025G]] ||
[[CVN-K12]]<br />
[[SAA-001]]<br />
[[SAB-001]]
|-
| [[Belize]] || [[CXD90036G]] ||
[[SAC-001]]<br />
[[SAD-001]]<br />
[[SAD-003]] (1-981-769-11)<br />
[[HAC-001]]<br />
[[NVA-001]]
|-
| [[Belize 2]] || [[CXD90046GG]] ||
[[NVB-003]]<br />
[[NVG-001]]<br />
?[[SAD-003]] (1-981-769-21, 1-981-769-31)?<br />
[[SAE-001]]<br />
[[SAE-003]]<br />
[[SAF-003]]<br />
[[SAF-005]]
|-
| [[Baikal]] || [[CXD90042GG]] ||
[[NVB-004]]<br />
[[NVG-002]]<br />
[[NVG-004]]<br />
[[SAD-002]]<br />
[[SAE-002]]<br />
[[SAE-004]]<br />
[[SAF-004]]<br />
[[SAF-006]]
|}


== Southbridge revisions per chassis ==
== Southbridge revisions per chassis ==
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{| class="wikitable sortable"
{| class="wikitable sortable"
|-
|-
! Model (chassis) !! Motherboards !! Southbridge Codename !! Oldest Manufacturing Date !! Newest Manufacturing Date
! Model (chassis) !! Motherboards !! Southbridge Codename !! Southbridge Labeling
|-
|-
| D1000 || All CVN || Aeolia || ||
| D1000 || All CVN || Aeolia || CXD90025G
|-
|-
| 1000 || All SAA || Aeolia || ||
| 1000 || All SAA || Aeolia || CXD90025G
|-
|-
| 1100 || All SAB || Aeolia || ||
| 1100 || All SAB || Aeolia || CXD90025G
|-
|-
| 1200 || All SAC || Belize || 2015-10 ||
| 1200 || All SAC || Belize || CXD90036G
|-
|-
| 2000 || SAD-001, SAD-003 (1-981-769-11) || Belize || 2016-04 ||
| 2000 || All SAD || Belize || CXD90036G
|-
|-
| 2000 || SAD-002 || Baikal || 2016-09 ||
| D7000 || All HAC || Belize  || CXD90036G
|-
|-
| 2000 || SAD-003 (1-981-769-21, 1-981-769-31) || ?Belize or Belize 2? || 2016-08 ||
| 7000 || All NVA || Belize / ?Belize 2? || CXD90036G / ?CXD90046GG?
|-
|-
| D7000 || HAC-001 || Belize || ||
| 2100 || All SAE || Belize 2 / Baikal || CXD90046GG
|-
|-
| 7000 || NVA-001 || Belize || 2017-05 ||
| 2200 || All SAF || Baikal || CXD90042GG
|-
|-
| 2100 || SAE-001, SAE-003 || Belize 2 || 2017-11 || 2017-12
| 7100 || All NVB || Baikal || CXD90042GG
|-
|-
| 2100 || SAE-002, SAE-004 || Baikal || 2017-06 || 2017-12
| 7200 || All NVG || Baikal || CXD90042GG
|}
 
== Motherboards per southbridge revisions ==
 
{| class="wikitable sortable"
|-
|-
| 7100 || NVB-003 || Belize 2 || 2018-05 || 2018-08
! Southbridge Codename !! Southbridge Labeling !! Motherboards
|-
|-
| 7100 || NVB-004 || Baikal || 2017-11 ||
| [[Aeolia]] || [[CXD90025G]] ||
[[CVN-K12]] <br>
[[SAA-001]] <br>
[[SAB-001]]
|-
|-
| 2200 || SAF-003, SAF-005 || Belize 2 || 2018-06 || 2018-09
| [[Belize]] || [[CXD90036G]] ||
[[SAC-001]] <br>
[[SAD-001]] <br>
[[SAD-003]] <br>
[[HAC-001]] <br>
[[NVA-001]]
|-
|-
| 2200 || SAF-004, SAF-006 || Baikal || 2018-03 || 2020-05
| [[Belize 2]] || [[CXD90046GG]] ||
[[NVB-003]] <br>
[[NVG-001]] <br>
[[SAE-001]]
|-
|-
| 7200 || NVG-001, NVG-003 || Belize 2 || 2018-11 || 2019-05
| [[Baikal]] || [[CXD90042GG]] ||
|-
[[NVB-004]] <br>
| 7200 || NVG-002, NVG-004 || Baikal || 2018-09 || 2019-06
[[SAD-002]] <br>
[[SAE-002]] <br>
[[SAE-003]] <br>
[[SAE-004]] <br>
[[SAF-003]] <br>
[[SAF-004]]
|}
|}


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{{Motherboard Components}}
{{Motherboard Components}}
<noinclude>
<noinclude>[[Category:Main]]</noinclude>
[[Category:Main]]
</noinclude>
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