Game Boy Wars 3/ROM map

The following article is a ROM map for Game Boy Wars 3.

Block 1 (000000-004000)

• 2995-29AC ~ HL = A * B
• 29BC-29C2 ~ HL += A
• 29C3-29C9 ~ HL -= DE
• 29D8-2A1C ~ HL *= DE (Signed)
• 2A1D-2A20 ~ HL = 0
• 2A21-2A6F ~ DE / BC: DE holds rounded down answer, BC holds remainder
• 2A70-2A78 ~ [HL] -= 1, BC *= -1
• 2A79-2A81 ~ [HL] -= 1, DE *= -1
• 3A93-3A9D ~ A = [HL + A]
• 3AC7-3AD0 ~ A = [HL + (A/8)] AND 2^(A%8)
• 3AD1-3ADB ~ [HL + (A/8)] = [HL + (A/8)] OR 2^(A%8)
• 3AE9-3B05 ~ HL + (A / 8): C holds 2^Remainder, HL holds rounded down answer
• 3B50-3B58 ~ ldi [HL],[DE]; inc DE, dec BC, repeat if BC != 0
• 3B79-3B83 ~ [HL], [HL+1]...[HL+BC] = A

Block 12 (02C000-030000)

• 4707-4713 ~ A = [18AB + A]
• 5539-555E ~ A = min(Movement Power, Fuel), [CD43] stuff (Movement Costs) is set up

Block 13 (030000-034000)

• 49A2-49CB ~ HL = Attack mutiplier with L using the float portion (A, B, and C use Support, Level, and Flank values respectively)
• 49CC-49FB ~ HL = Defense multiplier with L using the float portion (A, B, and C use Cover, Level, and Flank values respectively and get halved and truncated in the process)
• 49FC-4A20 ~ HL = Stat * HP * Multiplier; Float error results in slight decrease if the intended multiplier doesn't divide by 0.25 into a whole number
• 4A21-4A25 ~ HL = 2 * Stat * HP * Multiplier; Float error results in slight decrease if the intended multiplier doesn't divide by 0.25 into a whole number
• 4A26-4A97 ~ calculates new HP for attacker's unit, rounds up, range from 0 to old HP
• 4A98-4B09 ~ calculates new HP for defender's unit, rounds up, range from 0 to old HP
  • Total ATK is calculated with 49FC, multiplier uses 49A2 and Stat is ATK
  • Total DEF is calculated with 4A21, multiplier uses 49CC and Stat is DEF
  • New HP is (Total DEF - Total ATK) / (2 * DEF)
  • Default to 0 and end procedure immediately if result is negative, round up, and then default to Old HP if result exceeds it
  • Effective damage formula is as follows: ATK * Attacker's HP * (100 + ATK boosts) / (200 * DEF) - DEF boosts * Defender's HP / 200

Block 18 (044000-048000)

• 4D3F-4D59 ~ if [C62F] != 1 && [C633]%2 = 1, [C77D + A/16] = [C77D + A/16] OR 2^((A/2)%8)

Block 19 (048000-04C000)

• 4000-401F ~ RAM addresses $D000~$D63F set to 0
• 4020-4028 ~ HL = Unit Type's stats starting location (A is Unit Type)
• 4029-4036 ~ HL = Unit's stats starting location (A is Unit #)
• 4037-4042 ~ A = Unit Type's used stat (A is Unit Type, C is used stat)
• 4043-404E ~ DE = Unit Type's used stat (2 bytes) (A is Unit Type, C is used stat)
• 404F-4065 ~ RAM addresses $CD28~$CD31 set to hold Unit Type's name
• 4066-4082 ~ A = Unit's used stat (A is Unit #, C is used stat)
• 4083-40A0 ~ DE = Unit's used stat (2 bytes) (A is Unit #, C is used stat)
• 40A1-40BC ~ B -> Unit's used stat (A is Unit #, C is used stat)
• 40BD-40DA ~ DE -> Unit's used stat (2 bytes) (A is Unit #, C is used stat)
• 40DB-40F4 ~ Adding the unit's EXP in, checking for 400 EXP cap (A is Unit #, HL is gained EXP)
• 40F5-4105 ~ A = Unit's Level - 1 (A is Unit #)
• 4106-412A ~ RAM addresses $CCDD~$CCED set to hold selected Unit's stats
• 412B-414D ~ selected Unit's stats moved from $CCDD~$CCED to $D000 list
• 42F6-4328 ~ A = side's current unit count (A is the given side)
• 4329-4350 ~ A != 0 && Z Flag Set: Loading Valid (A is 1st Unit's #, B is 2nd Unit's #)
• 4351-43B8 ~ A = prevent Supply flag (A is receiving unit, B is giving unit)
• 43F4-4435 ~ process 48436 for given property type (A is terrain type byte)
• 4436-4457 ~ $CD0B holds available Unit Type count, $CD0C, etc. holds Unit Type choices (B is starting unit type)
• 4458-446F ~ Mercenary Unit equivalent of 12:4436
• 4470-447C ~ if unit is buyable, A = 0; else, A = 2 (A is Unit Type)
• 447D-448C ~ if unit is considered buyable A = 0; else, A = 2
• 448D-4497 ~ $4986 stuff
• 4498-44B7 ~ if Unit is at S-Rank, A = promoted Unit Type # * 2 + country bit; else, A = 0 (A is Unit #)
• 44B8-44BF ~ promoted Unit Type #
• 44C0-4509 ~ confirmed promotion procedure
• 4585-4596 ~ Unit's End Turn bit set
• 4741-4757 ~ Unit's 8th stat = Unit Type's Fuel
• 4758-477C ~ Unit's 9th and 10th stats = Unit Type's Ammo (each weapon)
• 477D-479E ~ recover HP
• 479F-47AC ~ A = used Movement Cost
• 47AD-47CD ~ [CD44-CD76] holds selected unit's Movement Costs (A is Movement Type)
• 497F-4985 ~ buyable units
• 4986-49A5 ~ pointers for 7 byte families that seem to involve unit buying
• 49A5-4A0E ~
• 4A0F-4A42 ~ promoted Unit Type #
• 4A43-4AAC ~ Unit Type stat pointers
• 4AAD-5255 ~ Unit Type stats
  • 0-9 ~ name characters
  • A ~ Max HP
  • B ~ Max Fuel
  • C ~ Movement Power
  • D ~ Transport Capacity
  • E ~ ?
  • F ~ Fuel Upkeep
  • 10, 11 ~ Gold Cost / 100G
  • 12, 13 ~ Materials Cost
  • 14 ~ Primary Weapon Type
  • 15 ~ Primary Weapon Ammo
  • 16 ~ Secondary Weapon Type
  • 17 ~ Secondary Weapon Ammo
  • 18 ~ Unit Family
  • 19 ~ Movement Type
  • 1A ~ Carrying Type
  • 1B, 1C, 1D ~ Carried Type
  • 1E-22 ~ DEF values
  • 23 ~ Base Focus
  • 24 ~ Focus Loss
• 5256-5297 ~ Weapon stat pointers (pointers)
• 5298-54A7 ~ Weapon stats
  • 0~7 ~ name characters
  • 8 ~ Minimum Range
  • 9 ~ Maximum Range
  • A-E ~ ATK (Armor, Lite Land, Air, Ship, Sub)
  • F ~ Cost per shot
• 54A8-54C5 ~ Movement Cost pointers
• 54C6-561E ~ Movement Costs

Block 42 (0A4000-0A8000)

Map data

Block 43 (0A8000-0AC000)

Map data

Block 44 (0AC000-0B0000)

Map data

Block 45 (0B0000-0B4000)

Map data (ends Standard, covers Beginner)

Block 46 (0B4000-0B8000)

Map data (campaign)

Block 47 (0B8000-0BC000)

Map data

Block 48 (0BC000-0C0000)

Map data

Block 52 (0CC000-0D0000)

Dialogue stuff

Block 53 (0D0000-0D4000)

Empty (all FFs)

Block 54 (0D4000-0D8000)

Empty (all FFs)

Block 55 (0D8000-0DC000)

Empty (all FFs)

Block 56 (0DC000-0E0000)

Empty (all FFs)

Block 57 (0E0000-0E4000)

Empty (all FFs)

Block 58 (0E4000-0E8000)

Empty (all FFs)

Block 59 (0E8000-0EC000)

Empty (all FFs)

Block 60 (0EC000-0F0000)

Empty (all FFs)

Block 61 (0F0000-0F4000)

Empty (all FFs)

Block 62 (0F4000-0F8000)

Empty (all FFs)