FF1NES - Revision history

BukTop: 5 revisions imported

2019-05-23T02:10:45Z

5 revisions imported

my_wiki>BukTop: 3 revisions imported

2018-04-04T09:34:07Z

3 revisions imported

my_wiki>Albeoris: Created page with "To understand how the data is organized for Final Fantasy 1, you must first understand how the original NES operated. The NES had a 6502 microprocessor, this gave the system..."

2018-03-20T22:00:37Z

Created page with "To understand how the data is organized for Final Fantasy 1, you must first understand how the original NES operated. The NES had a 6502 microprocessor, this gave the system..."

my_wiki>Halkun at 04:54, 25 November 2006

2006-11-25T04:54:03Z

my_wiki>Halkun at 04:45, 25 November 2006

2006-11-25T04:45:26Z

my_wiki>Halkun at 04:33, 25 November 2006

2006-11-25T04:33:52Z

New page

To understand how the data is organized for Final Fantasy 1, you must first understand how the original NES operated.

The NES had a 6502 microprocessor, this gave the system a maximum of 65,536 bytes, or 64K of addressable memory. At the time, RAM was very expensive, costing upwardly of one dollar per kilobyte of storage. When Nintendo created the original NES, the game slot plugged in 32K of ROM, split into two sections of 16K each. As games grew, "mapping" technologies allowed the top half of 16K to be swapped out for other sections of 16K ROM.

FF1 uses this technology to organize it's ROM. The game is split into 16 banks of 16K each. (This means the whole game is 256K in size.)

A typical NES ROM downloaded from the Internet almost always has a 10 byte header at the beginning. For our purposes, this data is going to be thrown away. This is for two reasons.

1)This document assumes you have an original ROM dump and not something downloaded.
2)It messes up bank boundaries and offsets by 10 bytes, making it harder to point to data

The following below is a map Of the ROM.

ROM map:
Bank 00 - Inital values
Bank 01 - Overworld map and decompresser
Bank 02 - Overworld Graphics/sprites
Bank 03 - Town/Dungeon graphics
Bank 04 - Town/Dungeon maps and decompresser
Bank 05 - Code
Bank 06 - Code
Bank 07 - Battle Graphics (Overworld)
Bank 08 - Battle Graphics (Dungeon)
Bank 09 - Shop/menu text/character battle/minimap
Bank 0A - Dialog
Bank 0B - Bridge Crossing/Ending Event
Bank 0C - Armor/weapon data
Bank 0D - Code + Crystal graphics.
Bank 0E - Code
Bank 0F - Kernel

@@ Line 6: / Line 6: @@
 A typical NES ROM downloaded from the Internet almost always has a 10 byte header at the beginning. For our purposes, this data is going to be thrown away. This is for two reasons.
 * This document assumes you have an original ROM dump and not something downloaded.
-*This document assumes you have an original ROM dump and not something downloaded.
+* It messes up bank boundaries and offsets by 10 bytes, making it harder to point to data
 The following below is a map of the ROM.
-{| border="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="center"
+{| class="wikitable"
-! style="background:rgb(204,204,204)" align="center" | Bank
+! Bank !! Data Within
 |-
-|style="background:rgb(255,255,255)" |[[Bank 1]]
+| Bank 0 || Inital values
 |-
-|style="background:rgb(255,255,255)" | [[Bank 2]]
+| Bank 1 || Overworld map and decompresser
 |-
-|style="background:rgb(255,255,255)" | [[Bank 3]]
+| Bank 2 || Overworld Graphics/sprites
 |-
-|style="background:rgb(255,255,255)" | [[Bank 4]]
+| Bank 3 || Town/Dungeon graphics
 |-
-|style="background:rgb(255,255,255)" | [[Bank 5]]
+| Bank 4 || Town/Dungeon maps and decompresser
 |-
-|style="background:rgb(255,255,255)" | [[Bank 6]]
+| Bank 5 || Code
 |-
-|style="background:rgb(255,255,255)" | [[Bank 7]]
+| Bank 6 || Code
 |-
-|style="background:rgb(255,255,255)" | [[Bank 8]]
+| Bank 7 || Battle Graphics (Overworld)
 |-
-|style="background:rgb(255,255,255)" | [[Bank 9]]
+| Bank 8 || Battle Graphics (Dungeon)
 |-
-|style="background:rgb(255,255,255)" | [[Bank A]]
+| Bank 9 || Shop/menu text/character battle/minimap
 |-
-|style="background:rgb(255,255,255)" | [[Bank B]]
+| Bank A || Dialog
 |-
-|style="background:rgb(255,255,255)" | [[Bank C]]
+| Bank B || Bridge Crossing/Ending Event
 |-
-|style="background:rgb(255,255,255)" | [[Bank D]]
+| Bank C || Armor/weapon data
 |-
-|style="background:rgb(255,255,255)" | [[Bank E]]
+| Bank D || Code + Crystal Graphics
 |-
-|style="background:rgb(255,255,255)" | [[Bank F]]
+| Bank E || Code
 |-
 |}

@@ Line 16: / Line 16: @@
 ! style="background:rgb(204,204,204)" align="center" | Data Within
 |-
-|style="background:rgb(255,255,255)" | Bank 0
+|style="background:rgb(255,255,255)" | [[Bank 0]]
 |style="background:rgb(255,255,255)" align="center" | Inital values
 |-
-|style="background:rgb(255,255,255)" | Bank 1
+|style="background:rgb(255,255,255)" |[[Bank 1]]
 |style="background:rgb(255,255,255)" align="center" | Overworld map and decompresser
 |-
-|style="background:rgb(255,255,255)" | Bank 2
+|style="background:rgb(255,255,255)" | [[Bank 2]]
 |style="background:rgb(255,255,255)" align="center" | Overworld Graphics/sprites
 |-
-|style="background:rgb(255,255,255)" | Bank 3
+|style="background:rgb(255,255,255)" | [[Bank 3]]
 |style="background:rgb(255,255,255)" align="center" | Town/Dungeon graphics
 |-
-|style="background:rgb(255,255,255)" | Bank 4
+|style="background:rgb(255,255,255)" | [[Bank 4]]
 |style="background:rgb(255,255,255)" align="center" | Town/Dungeon maps and decompresser
 |-
-|style="background:rgb(255,255,255)" | Bank 5
+|style="background:rgb(255,255,255)" | [[Bank 5]]
 |style="background:rgb(255,255,255)" align="center" | Code
 |-
-|style="background:rgb(255,255,255)" | Bank 6
+|style="background:rgb(255,255,255)" | [[Bank 6]]
 |style="background:rgb(255,255,255)" align="center" | Code
 |-
-|style="background:rgb(255,255,255)" | Bank 7
+|style="background:rgb(255,255,255)" | [[Bank 7]]
 |style="background:rgb(255,255,255)" align="center" | Battle Graphics (Overworld)
 |-
-|style="background:rgb(255,255,255)" | Bank 8
+|style="background:rgb(255,255,255)" | [[Bank 8]]
 |style="background:rgb(255,255,255)" align="center" | Battle Graphics (Dungeon)
 |-
-|style="background:rgb(255,255,255)" | Bank 9
+|style="background:rgb(255,255,255)" | [[Bank 9]]
 |style="background:rgb(255,255,255)" align="center" | Shop/menu text/character battle/minimap
 |-
-|style="background:rgb(255,255,255)" | Bank A
+|style="background:rgb(255,255,255)" | [[Bank A]]
 |style="background:rgb(255,255,255)" align="center" | Dialog
 |-
-|style="background:rgb(255,255,255)" | Bank B
+|style="background:rgb(255,255,255)" | [[Bank B]]
 |style="background:rgb(255,255,255)" align="center" | Bridge Crossing/Ending Event
 |-
-|style="background:rgb(255,255,255)" | Bank C
+|style="background:rgb(255,255,255)" | [[Bank C]]
 |style="background:rgb(255,255,255)" align="center" | Armor/weapon data
 |-
-|style="background:rgb(255,255,255)" | Bank D
+|style="background:rgb(255,255,255)" | [[Bank D]]
 |style="background:rgb(255,255,255)" align="center" | Code + Crystal Graphics
 |-
-|style="background:rgb(255,255,255)" | Bank E
+|style="background:rgb(255,255,255)" | [[Bank E]]
 |style="background:rgb(255,255,255)" align="center" | Code
 |-
-|style="background:rgb(255,255,255)" | Bank F
+|style="background:rgb(255,255,255)" | [[Bank F]]
 |style="background:rgb(255,255,255)" align="center" | Kernel
 |-
 |}

← Older revision	Revision as of 02:10, 23 May 2019
(No difference)

← Older revision	Revision as of 09:34, 4 April 2018
(No difference)

@@ Line 7: / Line 7: @@
 A typical NES ROM downloaded from the Internet almost always has a 10 byte header at the beginning. For our purposes, this data is going to be thrown away. This is for two reasons.
-)This document assumes you have an original ROM dump and not something downloaded.
+*This document assumes you have an original ROM dump and not something downloaded.
-)It messes up bank boundaries and offsets by 10 bytes, making it harder to point to data
+*It messes up bank boundaries and offsets by 10 bytes, making it harder to point to data
-The following below is a map Of the ROM.
+The following below is a map of the ROM.
-ROM map:
+{| border="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="center"
-Bank 00 - Inital values
+! style="background:rgb(204,204,204)" align="center" | Bank
-Bank 01 - Overworld map and decompresser
+! style="background:rgb(204,204,204)" align="center" | Data Within
-Bank 02 - Overworld Graphics/sprites
+|-
-Bank 03 - Town/Dungeon graphics
+|style="background:rgb(255,255,255)" | Bank 0
-Bank 04 - Town/Dungeon maps and decompresser
+|style="background:rgb(255,255,255)" align="center" | Inital values
-Bank 05 - Code
+|-
-Bank 06 - Code
+|style="background:rgb(255,255,255)" | Bank 1
-Bank 07 - Battle Graphics (Overworld)
+|style="background:rgb(255,255,255)" align="center" | Overworld map and decompresser
-Bank 08 - Battle Graphics (Dungeon)
+|-
-Bank 09 - Shop/menu text/character battle/minimap
+|style="background:rgb(255,255,255)" | Bank 2
-Bank 0A - Dialog
+|style="background:rgb(255,255,255)" align="center" | Overworld Graphics/sprites
-Bank 0B - Bridge Crossing/Ending Event
+|-
-Bank 0C - Armor/weapon data
+|style="background:rgb(255,255,255)" | Bank 3
-Bank 0D - Code + Crystal graphics.
+|style="background:rgb(255,255,255)" align="center" | Town/Dungeon graphics
-Bank 0E - Code
+|-
-Bank 0F - Kernel
+|style="background:rgb(255,255,255)" | Bank 4