Final Fantasy I & II: Dawn of Souls/ROM map

The following article is a ROM map for Final Fantasy I & II: Dawn of Souls.

The following offsets have been determined for Final Fantasy I only. All offsets are given in hexadecimal format. All currently described ASM routines are in Thumb mode. (Under Construction)

General Purpose Routines

Core Routines:

• 000EFC-000F81 (000086) = Core division-related routines
• 000F18 = General division routine. Given r0 = divident and r1 = divisor, checks for zero and calls software division
• 000F2C = As above, but only returns remainder in r0
• 000F68 = Divides r1 by r2; stores the product in [r0],[r0+8] and the remainder in [r0+4]

Game-Specific Routines:

• 014E4C-014E6B (000020) = Uncompressed tile graphic size finder routine
• 014E6C-0158E7 (000A7C) = Unknown (Short ASM routines)
• 0158E8-0158FB (000014) = Chest State Determination Routine
• 0158FC-01591B (000020) = Unknown ASM Routine (reads $02001DF0)

FF1 Stat Routines

• 01591C-0159B3 (000098) = Total Attack Determination
• 0159B4-015ACB (000118) = Total Defence Determination
• 015ACC-015B8F (0000C4) = Total Evade Determination
• 015B90-015C23 (000094) = Effective Max HP Determination
• 015C24-015CB7 (000094) = Effective Max MP Determination
• 015CB8-015D4B (000094) = Total Intellect Determination
• 015D4C-015DDF (000094) = Total Agility Determination
• 015DE0-015E73 (000094) = Total Stamina Determination
• 015E74-015F07 (000094) = Total Strength Determination
• 015F08-015F43 (00003C) = Current HP/MP Determination (And Possible Truncation)
• 015F44-015F83 (000040) = Total Accuracy Determination

FF1 Animation Routines

• 01E2FC-01E8C3 (0005C8) = Root Spell/Weapon Animation Handling
• 01E8C4-01F12F (00086C) = Unknown Routines
• 01F130-01F1A3 (000074) = Conditional Animation Effect Handling
• 01F1A4-01F743 (0005A0) = Animation Chunk Storage Routine
• 01F744-02B4B3 (00BD70) = Unknown/Animation-related routines; exact function undetermined
• 02B4B4-02BE3F (00098C) = Unknown Routines

FF1 Text, Menu and Field Spell Routines

• 02BE40-02BF7F (000140) = Base Menu Window Drawing Routine
• 02BF80-02C0C3 (000144) = Base Text Printing Routine
• 02C0C4-02C43F (00037C) = Two Unknown Routines
• 02C440-02C7A7 (000368) = Base Number Printing Routine
• 02C7A8-0302BB (003B14) = Unknown
• 0302BC-0304DB (000220) = Out-of-Battle Spell Usability Pointer Table+Routines
• 0304DC-0308BB (0003E0) = Out-of-Battle Spell Effect Pointer Table+Routines
• 0308BC-038917 (00805C) = Unknown
• 038918-039347 (000A30) = Root Status Screen Drawing Routine
• 039348-03A1A7 (000E60) = Unknown Routines
• 03A1A8-03A26B (0000C4) = Out-of-Battle Healing Spell Base Healing Determination
• 03A26C-03A2FF (000094) = Armor Equipping: Writing to Memory
• 03A300-03A37F (000080) = Armor Removing: Adding to Inventory

FF1 Shopping Routines

• 043910-04465F (000D50) = Root Buying Window Logic
• 044660-044B83 (000524) = Unknown Routines
• 044B84-044BCB (000048) = Item/Armor/Weapon Sorting Order Loading Routine
• 044BCC-044C3B (000070) = Buying: Does item already exist among team's gear?
• 044C3C-044C6F (000034) = Buying: Does item already exist in inventory?
• 044C70-0454E3 (000874) = Root Spell Buying Routine?
• 0454E4-0456A3 (0001C0) = Spell Buying: Can purchaser learn this spell?
• 0456A4-0456E3 (000040) = Class Usability for Given Spell Determination
• 0456E4-045F9B (0008B8) = Unknown Routines
• 045F9C-04714B (0011B0) = Root Buying/Selling Screen Drawing Routine
• 04714C-0471DB (000090) = Unknown Shopping-Related Routine
• 0471DC-047813 (000638) = Root Shop Data Loading Routine?