Dragon Warrior is an RPG. You play the last descendant of the line of Erdrick in the land of Alefgard. You must fight enemies to gain gold and experience which will let you buy better equipment and become more powerful. You also have to rescue princess Gwaelin, find several relics to make a bridge, and defeat the evil Dragonlord. The game is very attractive for such an early RPG, but too much time is spent grinding to power yourself up.
|00C5||FF||-||Infinite Hit Points|
|00C6||FF||-||Infinite Magic Points|
|00BE||FF||-||Have Best Equipment|
|00E2||00||-||Kill Enemies In One Hit|
|00BF||09||-||Infinite Magic Keys|
| All Spells (1/2)|
All Spells (1/2)
|00DB||FF||-||Repel Lasts Forever|
|00D0||07||-||See In the Dark|
|CDE3||00||02||No Damage From Swamps|
|CE48||00||0F||No Damage From Barriers|
|E344||FF||78||First Chest Has 255 Gold|
|How do I use these?|
Note: Two versions of Dragon Warrior were released in North America. Differences are labeled.
0000 - Used for manipulating variables (doing damage, gaining xp and gp, etc.) 0047 - Controller 1 poll 008E - Map X Pos 008F - Map Y Pos 00B5-00B8 - First 4 characters of player's name 00B9 - Loaded with #FA at game load, and doesn't seem to change 00BA - Experience: x1 00BB - Experience: x256 00BC - Gold: x1 00BD - Gold: x255 00BE - Equipment (See Equipment List below) 00BF - Magic Keys 00C0 - Herbs (00-09) 00C1 - Items 2/1 (See Item List below) 00C2 - Items 4/3 00C3 - Items 6/5 00C4 - Items 8/7 00C5 - Hit Points 00C6 - Magic Points 00C7 - Level 00C8 - Strength place holder for Status (The following don't save to the character) 00C9 - Agility place holder for Status 00CA - Max HP place holder for Status 00CB - Max MP place holder for Status 00CC - Attack Power place holder for Status 00CD - Defense Power place holder for Status 00CE - Spells Bit Flag (Gets overwritten from battery) 01 - Heal 02 - Hurt 04 - Sleep 08 - Radiant 10 - Stopspell 20 - Outside 40 - Return 80 - Repel 00CF - Misc Player Variables Bit Flag 01 - Healmore spell 02 - Hurtmore spell 04 - 08 - 10 - Dragon Scale 20 - Fighter's Ring 40 - Cursed Belt 80 - Cursed Necklace 00D0 - Vision distance in the dark (Dark = 1, Torch = 3, Radiant = 7/5/3) - Note: Max value = 7, greater values do not reveal more, just graphical glitches 00D1 - Used for palette shifting while scrolling vertically 00D2 - Cursor X 00D3 - Cursor Y 00D7 - Last chosen menu item (00-09, FF - None) 00D8 - Highlighted menu item Col 1 (00-03) 00D9 - Highlighted menu item Col 2 (00-09) 00DA - Radiant Spell Countdown 00DB - Fairy Water / Repel Countdown (Even for fairy water, odd for repel) 00DE - Monster Injury Flash Countdown 00DF - Carrying Princess (08 - No, 09 - Yes) 00E0 - Tile walking on 00 - Grass 01 - Desert 02 - Hills 03 - Stairs Up 04 - Tiles 05 - Stairs Down 06 - Swamp 07 - Town 08 - Cave 09 - Castle 0A - Bridge 0B - Forest 0C - Chest 0D - Force Field 00E2 - Enemy HP 00E5 - Message Speed (00 - Fast, 01 - Normal, 02 - Slow) - Note: Can increase beyond normal means for -really- slow text 00E6-00FF - Sound Variables 0110-01FF - Stack 0200-02FF - Sprite Memory 0400-07BF - Tile layout for screen menus E344 - Initial Chest Gold (78)
Items are stored two to a byte. Item 1 is right nybble, item 2 is the left nybble. So if you wanted your first two items to be a torch and the death necklace, you set 00C1 to B1.
1 - Torch 2 - Fairy Water 3 - Wings 4 - Dragon's Scale 5 - Fairy Flute 6 - Fighter's Ring 7 - Erdrick's Token 8 - Gwaelin's Love 9 - Cursed Belt A - Silver Harp B - Death Necklace C - Stones of Sunlight D - Staff of Rain E - Rainbow Drop F - Herb
The designers of the equipment didn't base it on the usual bit flag (using powers of 2) for each item. However, since you can't have more than one type of equipment at a time, they were able to fit all of the items in a single byte. Simply take one item from each list, add them together, and the sum is the equipment value.
00 - Nothing 01 - Small Shield 02 - Large Shield 03 - Silver Shield 04 - Clothes 08 - Leather Armor 0C - Chain Mail 10 - Half Plate Armor 14 - Full Plate Armor 18 - Magic Armor 1C - Erdrick's Armor 20 - Bamboo Pole 40 - Club 60 - Copper Sword 80 - Hand Axe A0 - Broad Sword C0 - Flame Sword E0 - Erdrick's Sword
This subroutine is called when the player takes damage from swamps.
CDDF:A5 C5 LDA $00C5 ; Load Hit Points into A. CDE1:38 SEC ; Set Carry Flag CDE2:E9 02 SBC #$02 ; Subtract #02 from A. CDE4:B0 02 BCS $CDE8 ; If A didn't go below #00, goto CDE8 CDE6:A9 00 LDA #$00 ; A went below #00, set it to #00. CDE8:85 C5 STA $00C5 ; Store A into Hit Points. CDEA:20 74 FF JSR $FF74
This subroutine is called when the player takes damage from barriers.
CE44:A5 C5 LDA $00C5 ; Load Hit Points into A. CE46:38 SEC ; Set the Carry Flag. CE47:E9 07 SBC #$0F ; Subtract #0F from A. CE49:B0 04 BCS $CE4F ; If A didn't go below #00, goto CE4F CE4B:A9 00 LDA #$00 ; A went below #00, set it to #00. CE4D:F0 00 BEQ $CE4F ; If A is equal to #00, goto CE4F (Compiler mistake?) CE4F:85 C5 STA $00C5 ; Store A into Hit Points.
Get Initial Attack Damage
Takes the player's attack power and subtracts a pseudo-random amount and stores the result in A.
E649:A5 CC LDA $00CC ; Load Attack Power. E64B:38 SEC ; E64C:E5 41 SBC $0041 ; Subtract $0041 ? E64E:4C 64 E6 JMP $E664 ; Goto Modify Attack Damage.
Modify Attack Damage
Takes whatever is in A and does that amount of damage to the enemy.
E664:85 00 STA $0000 E666:A9 00 LDA #$00 E668:85 01 STA $0001 E66A:24 DF BIT $00DF E66C:70 2C BVS $E69A E66E:20 5B C5 JSR $C55B
Called when the player is to take damage. The amount of damage is stored in $0000.
ED25:A9 00 LDA #$00 ; Clear A. ED27:85 01 STA $0001 ; Clear $0001. ED29:A5 C5 LDA $00C5 ; Load Hit Points into A. ED2B:38 SEC ; ED2C:E5 00 SBC $0000 ; Subtract damage from Hit Points. ED2E:B0 02 BCS $ED32 ; If result > 0 (carry is set)... ED30:A9 00 LDA #$00 ; Load A with 0. ED32:85 C5 STA $00C5 ; Store A into Hit Points.
Dragon Warrior has a complicated character set. There are three sets, two of them overlap each other to save space. They are then interpreted at a bit level when drawn, it seems like only one of them is actually used though because a third, more straight forward, set is used for all the dialogue.
00=0 01=1 02=2 03=3 04=4 05=5 06=6 07=7 08=8 09=9 24=A 25=B 26=C 27=D 28=E 29=F 2A=G 2B=H 2C=I 2D=J 2E=K 2F=L 30=M 31=N 32=O 33=P 34=Q 35=R 36=S 37=T 38=U 39=V 3A=W 3B=X 3C=Y 3D=Z 5F= 60=! 61=. 62=© 63=-
00=0 01=1 02=2 03=3 04=4 05=5 06=6 07=7 08=8 09=9 0A=a 0B=b 0C=c 0D=d 0E=e 0F=f 10=g 11=h 12=i 13=j 14=k 15=l 16=m 17=n 18=o 19=p 1A=q 1B=r 1C=s 1D=t 1E=u 1F=v 20=w 21=x 22=y 23=z 24=A 25=B 26=C 27=D 28=E 29=F 2A=G 2B=H 2C=I 2D=J 2E=K 2F=L 30=M 31=N 32=O 33=P 34=Q 35=R 36=S 37=T 38=U 39=V 3A=W 3B=X 3C=Y 3D=Z 3E=“ 3F=” 40=’ 41=* 42=→ 43=↓ 44=: 45=… 47=. 48=, 49=- 4B=? 4C=! 4D=; 4E=) 4F=( 50=‘ 51=´ 52=.’ 53=' 54=´ 5F= F8=<player>
- gamefaqs.com/nes/563408-dragon-warrior/faqs/61640 - Detailed breakdown of the game's algorithms including, reversed engineered source code.