SNES ROM Header: Difference between revisions

Revision as of 02:11, 18 July 2019

All SNES gamepaks have an internal header that is used to identifying the game, producer, region and technical aspects of the ROM. It's often referred as Internal ROM Header or SNES Software Specification.

Although it's not required to run a game on real hardware, the SNES ROM Header was used during the Nintendo approval process for validation and it's also used by the SNES emulators to identify and determine the memory layout and ROM type.

The data starts at SNES address $00:FFB0 and ends at $00:FFDF. $00:FFE0 though $00:FFFF contains the SNES vector information and is actually used by the SNES CPU to determine where to execute when an interrupt occurs.

ROM Registration Data

Address	Length	Data Name Type
$00:FFB0	2 bytes	Maker Code
$00:FFB2	4 bytes	Game Code
$00:FFB6	7 bytes	Fixed Value
$00:FFBD	1 byte	Expansion RAM Size
$00:FFBE	1 byte	Special Version
$00:FFBF	1 byte	Cartridge Type (Sub-number)
$00:FFC0	21 bytes	Game Title Registration
$00:FFD5	1 byte	Map Mode
$00:FFD6	1 byte	Cartridge Type
$00:FFD7	1 byte	ROM Size
$00:FFD8	1 byte	RAM Size
$00:FFD9	1 byte	Destination Code
$00:FFDA	1 byte	Fixed Value
$00:FFDB	1 byte	Mask ROM Version
$00:FFDC	2 bytes	Complement Check
$00:FFDE	2 bytes	Check Sum

Data Name Types

Maker Code

Game Code

Fixed Value

Expansion RAM Size

Special Version

Game Title Specification

Cartridge Configuration

Map Mode

Cartridge Type

ROM Size

RAM Size

Destination Code

Mask ROM Version

ROM Verification

Complement Check

Check Sum

@@ Line 1: / Line 1: @@
-All [[Super Nintendo]] gamepaks have an internal header that is used to identifying the game, producer, region and technical aspects of the ROM. It's often referred as '''Internal ROM Header''' or '''SNES Software Specification'''.
+All [[SNES]] gamepaks have an internal header that is used to identifying the game, producer, region and technical aspects of the ROM. It's often referred as '''Internal ROM Header''' or '''SNES Software Specification'''.
 Although it's not required to run a game on real hardware, the SNES ROM Header was used during the Nintendo approval process for validation and it's also used by the SNES emulators to identify and determine the memory layout and ROM type.
@@ Line 7: / Line 7: @@
 == ROM Registration Data ==
-== Game Title Registration ==
+{| class="wikitable"
+|-
+! Address !! Length !! Data Name Type
+|-
+| $00:FFB0 || 2 bytes || Maker Code
+|-
+| $00:FFB2 || 4 bytes || Game Code
+|-
+| $00:FFB6 || 7 bytes || Fixed Value
+|-
+| $00:FFBD || 1 byte || Expansion RAM Size
+|-
+| $00:FFBE || 1 byte || Special Version
+|-
+| $00:FFBF || 1 byte || Cartridge Type (Sub-number)
+|-
+| $00:FFC0 || 21 bytes || Game Title Registration
+|-
+| $00:FFD5 || 1 byte || Map Mode
+|-
+| $00:FFD6 || 1 byte || Cartridge Type
+|-
+| $00:FFD7 || 1 byte || ROM Size
+|-
+| $00:FFD8 || 1 byte || RAM Size
+|-
+| $00:FFD9 || 1 byte || Destination Code
+|-
+| $00:FFDA || 1 byte || Fixed Value
+|-
+| $00:FFDB || 1 byte || Mask ROM Version
+|-
+| $00:FFDC || 2 bytes || Complement Check
+|-
+| $00:FFDE || 2 bytes || Check Sum
+|}
-== ROM Version ==
+== Data Name Types ==
+=== Maker Code ===
+=== Game Code ===
+=== Fixed Value ===
+=== Expansion RAM Size ===
+=== Special Version ===
+=== Game Title Specification ===
+=== Cartridge Configuration ===
+==== Map Mode ====
+==== Cartridge Type ====
+==== ROM Size ====
+==== RAM Size ====
+=== Destination Code ===
+=== Mask ROM Version ===
+=== ROM Verification ===
+==== Complement Check ====
+==== Check Sum ====