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ACF is a data structure stored in PS4 Kit System Flash at offset [http://www.psdevwiki.com/ps4/Flash-Main#0x1C9080_ACF_.28Dev.2FTest.29 0x1C9080].
ACF is a data structure stored in PS4 Kit System Flash at offset [http://www.psdevwiki.com/ps4/Flash-Main#0x1C9080_ACF_.28Dev.2FTest.29 0x1C9080].
ACF certainly stands for Activation Code/Control/Console File/Flag.
See also [https://wiki.henkaku.xyz/vita/AFV PSVita equivalent].


= Structure =
= Structure =
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! From !! To !! Description
! From !! To !! Description
|-
|-
| 1C9080 || 1C9083 || '''Magic''' "acf\0"
| 1C9080 || 1C9083 || '''Magic''' "ACF\0"
|-
|-
| 1C9084 || 1C9087 || '''Format Version''' Constant 4 bytes. (format_ver, format_minor_ver)
| 1C9084 || 1C9087 || '''Format version''' Constant 4 bytes always the same. (format_ver, format_minor_ver inside)
|-
|-
| 1C9088 || 1C9097 || '''Activation Key'''
| 1C9088 || 1C9097 || '''Activation Key'''  
|-
|-
| 1C9098 || 1C909B || '''Issue Number'''. Ex: 3, 15.
| 1C9098 || 1C909B || '''Constant 0''' Constant 4 bytes always the same.
|-
|-
| 1C909C || 1C909F || '''Start Date''' 4 bytes. Little Endian.
| 1C909C || 1C909F || '''Start date''' 4 bytes. Little Endian.
|-
|-
| 1C90A0 || 1C90A3 || '''Expire Date''' 4 bytes. Little Endian. Usually 90 days since Start Date.
| 1C90A0 || 1C90A3 || '''Expire date''' 4 bytes. Little Endian. Usually 90 days more than Last start activation date.
|-
|-
| 1C90A4 || 1C90A7 || '''Reserved''' Always zeroed.
| 1C90A4 || 1C90A7 || '''Constant 1''' Constant 4 bytes always the same.
|-
|-
| 1C90A8 || 1C90E7 || '''Key_Hash''' Unique 64 bytes.
| 1C90A8 || 1C90E7 || '''Key_Hash''' Unique 64 bytes.
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     uint32_t format_ver;
     uint32_t format_ver;
     char activation_key[16];
     char activation_key[16];
     uint32_t issue_no;  
     uint32_t const_0;
     uint32_t start_date;
     uint32_t start_date;
     uint32_t expire_date;
     uint32_t expire_date;
     uint32_t reserved;
     uint32_t const_1;
     char key_hash[64];
     char key_hash[64];
  } SceAcf;
  } SceAcf;
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