If you are still using the old URL (datacrystal.romhacking.net), please update your bookmarks! The old URL may stop working soon.
The current URL is datacrystal.tcrf.net.

Arcana/RAM map

From Data Crystal
Jump to navigation Jump to search

Chip tiny.png The following article is a RAM map for Arcana.

(Back to Main page)

The list corresponds to RAM variables used by the game engine. They are generally accessed by LDA and STA instructions.

Main Loop

  • $1049: Pointer to indirect function calls (JMP [$1049])
  • $1E10: Event pointer, used for reading most of the game's code (LDA [$10]) (long ptr)
  • $1E14: Event pointer stack, stores return addresses during function calls

Temporary Arrays

Typically these are accessed i.e. LDA $09C7,x where the x register is determined at runtime.

  • $0643-065B: Enemies in battle (Enemy ID + 18), set to FFFF when killed
  • $09A3-09BB: ??
  • $09C7-09DF: Miscellaneous return values (i.e. type of treasure contents, item/spell/enemy chosen)
  • $09EB-0A03: Current selection (Attacker ID, caster ID, whose turn is it etc)
  • $0A0F-0A27: Target (ID being attacked, treasure chest being opened)
  • $0B9F,x: Stores function results (0=failure)
  • $0CB3,x: Stores function results (0=failure)

Battle

  • $0A87-$0A8E: Current selected battle command (2 bytes per character)
    • #$0001: Main menu
    • #$0003: Items/Magic
    • #$0004: Cards
    • #$0005: Weapons
    • #$0008: Attack
  • $1121: Attacker
  • $1123: Target
  • $1127: Spell ID
  • $11C1: Battle state (00=not fighting/can move, 02=battle poses, )
  • $11C3: Status/Condition (a series of words in the order: Rooks, Spirit, Guest1, Guest2, Enemies 1-8)
    • Odd byte:
      • #$00: Satisfactory
      • #$01: Deceased
      • #$02: Not Here
      • #$03: Paralyzed
      • #$04: Petrified
      • #$05: Confused
      • #$06: Sleeping
    • Even byte: #$01 indicates a party member
  • $11F3-11FA: Order that spells hit the party (2 bytes per character)
    • #$0000: Upper left
    • #$0001: Upper right
    • #$0002: Lower left
    • #$0003: Lower right
  • $120B: Rooks' Element/Race
  • $120D: Spirit's Element/Race
  • $120F: Guest1's Element/Race
  • $1211: Guest2's Element/Race
  • $1213: Enemy1's Element/Race
  • $1215: Enemy2's Element/Race
  • $1217: Enemy3's Element/Race
  • $1219: Enemy4's Element/Race
  • $121B: Enemy5's Element/Race
  • $121D: Enemy6's Element/Race
  • $121F: Enemy7's Element/Race
  • $1221: Enemy8's Element/Race
  • $1223: Rooks' Strength
  • $1225: Spirit's Strength
  • $1227: Guest1's Strength
  • $1229: Guest2's Strength
  • $122B: Enemy1's Strength
  • $122D: Enemy2's Strength
  • $122F: Enemy3's Strength
  • $1231: Enemy4's Strength
  • $1233: Enemy5's Strength
  • $1235: Enemy6's Strength
  • $1237: Enemy7's Strength
  • $1239: Enemy8's Strength
  • $123B: Rooks' Intelligence (reduces magic damage taken, increases magic damage, affects magic evade)
  • $123D: Spirit's Intelligence
  • $123F: Guest1's Intelligence
  • $1241: Guest2's Intelligence
  • $1243: Enemy1's Intelligence
  • $1245: Enemy2's Intelligence
  • $1247: Enemy3's Intelligence
  • $1249: Enemy4's Intelligence
  • $124B: Enemy5's Intelligence
  • $124D: Enemy6's Intelligence
  • $124F: Enemy7's Intelligence
  • $1251: Enemy8's Intelligence
  • $1253: Rooks' Endurance (reduces physical damage taken)
  • $1255: Spirit's Endurance
  • $1257: Guest1's Endurance
  • $1259: Guest2's Endurance
  • $125B: Enemy1's Endurance
  • $125D: Enemy2's Endurance
  • $125F: Enemy3's Endurance
  • $1261: Enemy4's Endurance
  • $1263: Enemy5's Endurance
  • $1265: Enemy6's Endurance
  • $1267: Enemy7's Endurance
  • $1269: Enemy8's Endurance
  • $126B: Rooks' Alertness (affects accuracy, evasion, critical hits and chance for extra turn)
  • $126D: Spirit's Alertness
  • $126F: Guest1's Alertness
  • $1271: Guest2's Alertness
  • $1273: Enemy1's Alertness
  • $1275: Enemy2's Alertness
  • $1277: Enemy3's Alertness
  • $1279: Enemy4's Alertness
  • $127B: Enemy5's Alertness
  • $127D: Enemy6's Alertness
  • $127F: Enemy7's Alertness
  • $1281: Enemy8's Alertness
  • $1283: Equipped weapon, Rooks
    • This actually affects your stats.
    • Two bytes each, in order of Rooks, Spirit, Guest 1 and Guest 2.
    • "Equipped by" flags:
      • #$00: Rooks
      • #$05: Teefa
      • #$06: Salah
      • #$07: Darwin
      • #$08: Axs
  • $1285: Equipped weapon, Spirit (unused)
  • $1287: Equipped weapon, Guest1
  • $1289: Equipped weapon, Guest2
  • $128B: Equipped weapon, Enemy1 (affects their attack animation)
  • $128D: Equipped weapon, Enemy2
  • $128F: Equipped weapon, Enemy3
  • $1291: Equipped weapon, Enemy4
  • $1293: Equipped weapon, Enemy5
  • $1295: Equipped weapon, Enemy6
  • $1297: Equipped weapon, Enemy7
  • $1299: Equipped weapon, Enemy8
  • $129B: Equipped armor, Rooks
  • $129D: Equipped armor, Spirit (unused)
  • $129F: Equipped armor, Guest1
  • $12A1: Equipped armor, Guest2
  • $12A3: Equipped armor, Enemy1 (affects their defense)
  • $12A5: Equipped armor, Enemy2
  • $12A7: Equipped armor, Enemy3
  • $12A9: Equipped armor, Enemy4
  • $12AB: Equipped armor, Enemy5
  • $12AD: Equipped armor, Enemy6
  • $12AF: Equipped armor, Enemy7
  • $12B1: Equipped armor, Enemy8
  • $12B3: Equipped amulet, Rooks
  • $12B5: Equipped amulet, Spirit (unused)
  • $12B7: Equipped amulet, Guest1
  • $12B9: Equipped amulet, Guest2
  • $12BB: Equipped amulet, Enemy1 (probably affects defense and magic defense)
  • $12BD: Equipped amulet, Enemy2
  • $12BF: Equipped amulet, Enemy3
  • $12C1: Equipped amulet, Enemy4
  • $12C3: Equipped amulet, Enemy5
  • $12C5: Equipped amulet, Enemy6
  • $12C7: Equipped amulet, Enemy7
  • $12C9: Equipped amulet, Enemy8
  • $12CB: Equipped ring, Rooks (unused)
  • $12CD: Equipped ring, Spirit (unused)
  • $12CF: Equipped ring, Guest1 (unused)
  • $12D1: Equipped ring, Guest2 (unused)
  • $12D3: Equipped ring, Enemy1 (unused)
  • $12D5: Equipped ring, Enemy2 (unused)
  • $12D7: Equipped ring, Enemy3 (unused)
  • $12D9: Equipped ring, Enemy4 (unused)
  • $12DB: Equipped ring, Enemy5 (unused)
  • $12DD: Equipped ring, Enemy6 (unused)
  • $12DF: Equipped ring, Enemy7 (unused)
  • $12E1: Equipped ring, Enemy8 (unused)
  • $12E3: Accuracy modifier (concerns Acc. Increase All and Accuracy Impair)
    • There are 3 possible states: StatDown, Normal and StatUp. StatUp and StatDown cancel each other out.
    • Byte values are as follows:
      • #$01: Rooks' accuracy up
      • #$04: Spirit's accuracy up
      • #$10: Guest1's accuracy up
      • #$40: Guest2's accuracy up
      • #$02: Rooks' accuracy down
      • #$08: Spirit's accuracy down
      • #$20: Guest1's accuracy down
      • #$80: Guest2's accuracy down
  • $12E5: Accuracy modifier (enemies)
  • $12E7: Evasion modifier (concerns Dodge All and Offense Impair) (same flags)
  • $12E9: Evasion modifier (enemies)
  • $12EB: Attack modifier (concerns Stomp All and Attack Impair) (same flags)
  • $12ED: Attack modifier (enemies)
  • $12EF: Defense modifier (concerns Wall All and Defense Impair) (same flags)
  • $12F1: Defense modifier (enemies)
  • $12F3: Current HP, Rooks
  • $12F5: Current HP, Spirit
  • $12F7: Current HP, Guest1
  • $12F9: Current HP, Guest2
  • $12FB: Current HP, Enemy1
  • $12FD: Current HP, Enemy2
  • $12FF: Current HP, Enemy3
  • $1301: Current HP, Enemy4
  • $1303: Current HP, Enemy5
  • $1305: Current HP, Enemy6
  • $1307: Current HP, Enemy7
  • $1309: Current HP, Enemy8
  • $130B: Copy of Current HP, Rooks
  • $130D: Copy of Current HP, Spirit
  • $130F: Copy of Current HP, Guest1
  • $1311: Copy of Current HP, Guest2
  • $1313: Copy of Current HP, Enemy1
  • $1315: Copy of Current HP, Enemy2
  • $1317: Copy of Current HP, Enemy3
  • $1319: Copy of Current HP, Enemy4
  • $131B: Copy of Current HP, Enemy5
  • $131D: Copy of Current HP, Enemy6
  • $131F: Copy of Current HP, Enemy7
  • $1321: Copy of Current HP, Enemy8
  • $1323: Current MP (Magic Points), Rooks
  • $1325: Current MP, Spirit
  • $1327: Current MP, Guest1
  • $1329: Current MP, Guest2
  • $132B: Current MP, Enemy1 (Enemies don't actually use MP, so these values just stay at 5555)
  • $132D: Current MP, Enemy2
  • $132F: Current MP, Enemy3
  • $1331: Current MP, Enemy4
  • $1333: Current MP, Enemy5
  • $1335: Current MP, Enemy6
  • $1337: Current MP, Enemy7
  • $1339: Current MP, Enemy8
  • $133B: Copy of Current MP (Magic Points), Rooks
  • $133D: Copy of Current MP, Spirit
  • $133F: Copy of Current MP, Guest1
  • $1341: Copy of Current MP, Guest2
  • $1343: Copy of Current MP, Enemy1 (Enemies don't actually use MP, so these values just stay at 5555)
  • $1345: Copy of Current MP, Enemy2
  • $1347: Copy of Current MP, Enemy3
  • $1349: Copy of Current MP, Enemy4
  • $134B: Copy of Current MP, Enemy5
  • $134D: Copy of Current MP, Enemy6
  • $134F: Copy of Current MP, Enemy7
  • $1351: Copy of Current MP, Enemy8
  • $1353: Current HP, Sylph
  • $1355: Current HP, Dao
  • $1357: Current HP, Marid
  • $1359: Current HP, Efrite
  • $135B: Current MP, Sylph
  • $135D: Current MP, Dao
  • $135F: Current MP, Marid
  • $1361: Current MP, Efrite
  • $1363: EXP to next level, Rooks
  • $1365: EXP to next level, Spirit (Unused? Seems to stay at 0258)
  • $1367: EXP to next level, Guest1
  • $1369: EXP to next level, Guest2
  • $136B: EXP award, Enemy1 (The EXP you get for beating this enemy. Unclaimed enemy slots are FFFF)
  • $136D: EXP award, Enemy2
  • $136F: EXP award, Enemy3
  • $1371: EXP award, Enemy4
  • $1373: EXP award, Enemy5
  • $1375: EXP award, Enemy6
  • $1377: EXP award, Enemy7
  • $1379: EXP award, Enemy8
  • $137B: Level, Rooks
  • $137D: Level, Spirit (Shares Rooks' level)
  • $137F: Level, Guest1
  • $1381: Level, Guest2
  • $1383: Level, Enemy1 (Affects run chance)
  • $1385: Level, Enemy2
  • $1387: Level, Enemy3
  • $1389: Level, Enemy4
  • $138B: Level, Enemy5
  • $138D: Level, Enemy6
  • $138F: Level, Enemy7
  • $1391: Level, Enemy8
  • $1393: Max HP, Rooks
  • $1395: Max HP, Spirit
  • $1397: Max HP, Guest1
  • $1399: Max HP, Guest2
    • (Next byte is Rooks' Max MP -> Enemies have no max HP/MP stat)
  • $139B: Max MP, Rooks
  • $139D: Max MP, Spirit
  • $139F: Max MP, Guest1
  • $13A1: Max MP, Guest2
  • $13A3: Temp EXP (A running total collected through battle)
  • $13A5: Temp GP
  • $13A7: Spirits not owned (Bit flags: xxxx EMDS) (Example: 6 -> 0110 -> missing Marid/Dao)
  • $13A9: Card inventory (Two bytes each, eight entries)
  • $13B9: Item inventory (Two bytes each, 48 entries)
  • $1419: Equipment inventory (Two bytes each, 48 entries)
    • Doesn't affect your stats, just tracks whose name is next to which equipment.
    • (item ID / quantity)
  • $1459: Rooks' spell list (Two bytes each, 32 entries)
  • $1499: Spirit's spell list (Two bytes each, 32 entries?)
  • $14D9: Guest1's spell list (Two bytes each, 32 entries?)
  • $1519: Guest2's spell list (Two bytes each, 32 entries?)
  • $1559: Current GP
  • $155B: Current party (Two bytes each)
    • #$00: Rooks
    • #$01: Sylph
    • #$02: Marid
    • #$03: Dao
    • #$04: Efrite
    • #$05: Teefa
    • #$06: Salah
    • #$07: Darwin
    • #$08: Axs
    • #$09: (Empty slot)

Inventory

  • $13A9-$13B7: Card inventory (2 bytes per slot, ID then quantity)
    • #$00: Empty slot
    • #$01: Wind Card
    • #$02: Earth Card
    • #$03: Water Card
    • #$04: Fire Card
    • #$05: Null Card
    • #$06: Fog Card
    • #$07: Call Amulet
    • #$08: Mirror Card (bugged)
  • $13B9-$1418: Item inventory (2 bytes per slot, $30 slots: ID then #$00)
    • #$01: Return Ring
    • #$02: Water of Life (dummied)
    • #$03: Sleeping Bag
    • #$04: Tent
    • #$05: Strength Honey
    • #$06: Intelligence Honey
    • #$07: Endurance Honey
    • #$08: Agility Honey
    • #$09: Restore Honey
    • #$0A: MP Honey
    • #$0B: Herbs
    • #$0C: Medicine
    • #$0D: Silver Flask
    • #$0E: Gold Flask
    • #$0F: Maiden's Tears
    • #$10: Moon Oil
    • #$11: Enchanted Jewel (dummied)
  • $1419–1458: Equipment inventory (2 bytes per slot, $20 slots: ID then Equipped By)
    • Equipped by flags:
    • #$00: Rooks
    • #$05: Teefa
    • #$06: Salah
    • #$07: Darwin
    • #$08: Axs
    • #$FF: Nobody

Actors Continued

  • $1459–$1398: Rooks' spell list (2 bytes per entry, Spell ID followed by #$00)
  • $1499–14D8: Spirit's spell list
  • $14D9-1518: Guest1's spell list
  • $1519–1558: Guest2's spell list
  • $155D: Active spirit
    • $01: Sylph
    • $02: Dao
    • $03: Marid
    • $04: Efrite
    • $09: none
  • $155F: Guest1
  • $1561: Guest2
    • $05: Teefa
    • $06: Salah
    • $07: Darwin
    • $08: Axs
    • $09: none

Miscellaneous

  • $0624-$0626: Active spirit's HP (Format: BCD)
  • $062D: Offset*2 used with $11F3
  • $06F9: X position of cursor
  • $071D: Y position of cursor
  • $09CB: Turn status (02: not turning, 00: turning left, 01: turning right)
  • $0A7F: Compass heading (00: N, 02: NE, 04: E, 06: SE... 0E: NW) (Tracks diagonals unlike $16FB)
  • $105A: Caches which H-DMA channels to run
  • $1064: Current music
  • $1066: Current sfx
  • $10EB-C: ASCII values for number being displayed
  • $1123: Used for asm x offsets
  • $11B5: Tracks progress in intro crawl
  • $11B9: Current page# in item list
  • $1573: ?? (Checked before changing music)
  • $1577: Window color (Bit depth: 0BBB B0GG GG0R RRR0)
  • $1579: Encounter related
  • $157B: Graphics related
  • $1580–16DF: Current display buffer
    • For spells, names are preceded by 06 0D (white) if usable and 06 0E (grayed) if not.
  • $16DB: Temp var (Attack power, battle damage, )
  • $16DD: Temp var (Defense power)
  • $16F3: #$01 if in motion, #$00 if standing still
  • $16F5: Current floor tile value
  • $16F7: Dungeon X position
  • $16F9: Dungeon Y position
  • $16FB: Current direction (#$00 North, #$02 East, #$04 South, #$06 West)
  • $16FD: Related to random encounters (usually 0)
  • $16FF: Map progress
  • $17BF: Map progress (mirror)
  • $1885: Shop selection (i.e. Card shop uses values 0-6)
  • $1895: Torn spirits (4 entries, 2b each: Sylph = 2)
  • $18C5: Spell type
  • $18C9: Temp MP
  • $18CD: Current Chapter # (01-05)
  • $18CF: Weather fx (Used in the intro)
  • $18D5: Stage select counter (adds 2 for every correct button press until $1C)
  • $18D7: Encounter layout (long ptr)
  • $18DA: Encounter enemy list (long ptr)
  • $18DF: Bosses defeated? (0=Ch2 start, 1=Cyclops killed)
  • $18E1: Temp var for Boss encounter (6 = Cyclops)
  • $18E3-$18E8: Treasure chest flags (each chest has its own bit)
  • $18F3: Decompression entry (long ptr)
  • $18F8: Decompression start (long ptr)
  • $18FF: Event pointer
    • 05: Started Chapter 2
    • 0A: Started Chapter 3
    • 0E: Started Chapter 4
    • 18: Started Chapter 5
Internal Data for Arcana
Retrieved from "https://datacrystal.tcrf.net/w/index.php?title=Arcana/RAM_map&oldid=63933"