Wizardry: Knight of Diamonds (NES)/Notes

20-2F Special Tiles

The following table notes what the 20-2F "special tiles" are for each floor of the maze. The specifics on how these are actually defined will be covered elsewhere.

-	floor	-	-	-	-	-
Address Value	B1	B2	B3	B4	B5	B6
20	Stairs to Castle	Stairs to 5E5N1D	Stairs to 0E0N2D	Stairs to 12E12N3D	Stairs to 7E12N4D	Stairs to 8E4N5D
21	Stairs to 5E5N2D	Stairs to 16E2N1D	Stairs to 18E1N2D	Stairs to 16E2N3D	Stairs to 0E0N6D	“One Alone” (Teleport to castle if more than one member in party)
22	Stairs to 16E2N2D	Stairs to 0E0N3D	Stairs to 12E12N4D	Stairs to 7E12N5D	KOD's Gauntlets Door	Room on Fire- If character not equipped with KOD equipment, kills them and dumps them back at the castle.
23	Nothing	“Three roads to follow” square	“Ever considered…” square	Nothing	Rock!	Exchange KOD equipment for Staff of Gnilda, teleport to 14E14N1D
24	Kobold King (And Gory Badge)	Stairs to 17E2N3D	Stairs to 16E2N4D	Trade Mithril key for Master Key	Entrance of Cavern	"It is beyond my support..."
25	Corroded Key square	Trade Gory Badge for Weird Emblem	Trade Weird Emblem for Mithril Key	Teleporter to 8E11N4D	Shattered Stone	"The most evil voice..."
26	Trade Corroded Key for Key of Ebony	Trade Key of Ebony for Key of Cloister	Chute to 3E4N4D	Teleporter to 11E11N4D	A cavern’s dark..	Tombstone- WORTHLESS RESTS HERE
27	Teleporter to 11E10N1D	Teleporter to 17E16N2D	Chute to 6E14N4D	100K Gold for information and to teleport to 10E0N4D	As the inside..	Foul Smell- Leave it to the brave
28	Teleporter to 14E17N1D	Teleporter to 5E2N2D	Chute to 17E16N4D	Square where you get the information after paying the gold	Down the hall..	Teleporter to 0E0N6D
29	Proclamation of Gnilda	Teleporter to 10E10N2D	5K Gold to teleport to Castle	Teleporter to 16E16N4D	...a clear blue fountain	Teleporter to 19E4N6D
2A	KOD's Armor	KOD's Shield	Hrathnir	KOD's Helmet	KOD's Gauntlets	Nothing
2B	“Are you ready?” square	Teleporter to 5E15N2D	Teleporter to 2E13N3D	Teleport to Castle (Mapiro Mahama Diromat)	"You are almost ruined."	Teleporter to 8E9N6D
2C	“Officers Only” (At least Weird Emblem required)	Corroded Key Door	Teleporter to 16E11N3D	Anti-magic (Need to at least leave floor to reset)	Nothing	Teleporter to 1E5N6D
2D	Search to fight Murphy’s Ghost	Gory Badge Door	Key of Cloister Door	Nothing	Nothing	Teleporter to 3E13N6D
2E	Pit	Ebony Key Door	Master Key Door	Spinner Tile	OUCH (Take damage)	Spinner
2F	Stronger Pit	Mithril Key Door	Rock!	Rock!	Even Stronger Pit	Demon Lord, but more research is needed on what actually triggers the fight to appear.

How These Tiles Are Implemented (And How To Change Them)

The specific data for these tiles begins at 0x850B. Each floor takes up 64 (0040) bytes. Each individual code is four bytes. So 0x850B is B1 Code 20, 0x850F is B1 Code 21, 0x8513 B1 Code 22, and so on. 0x854B is the start of B2's data, 0x858B is B3's data, etc.

The data for Floor...	Begins at address...
B1	0x850B
B2	0x854B
B3	0x858B
B4	0x85CB
B5	0x860B
B6	0x864B

The first byte of each four-byte code governs what type of square it is, and thus what the remaining three bytes mean.

For some codes, it may look like there is redundant data--for code 0C for instance, both the second and fourth bytes are the Item ID being checked. This is not a typo; it is actually how it is stored in the ROM, though I don't yet know why without a deep dive into the code.

If the first byte is	The square is	The second byte is	The third byte is	The fourth byte is
00	Nothing!	Nothing!	Nothing!	Nothing!
01	Stairs	East coordinate of destination	North coordinate of destination	Down coordinate of destination
02	Teleporter	East coordinate of destination	North coordinate of destination	Down coordinate of destination
03	Chute!	East coordinate of destination	North coordinate of destination	Down coordinate of destination
04	Rock! (Party dies and is transported back to the castle)	Nothing!	Nothing!	Nothing!
05	Pit	(Specifics unknown, but all three bytes seem to govern the power of the pit/how much damage you take)	-	-
06	OUCH	(Specifics unknown, but all three bytes seem to govern how much damage you take)	-	-
07	Spinner- faces you in a random direction when you step onto it	Nothing!	Nothing!	Nothing!
08	Message square	Nothing!	Pointer to the correct text	Nothing!
0A	5K Gold to teleport to castle (Will you pay?)	Nothing!	Pointer to the correct text	Nothing!
0C	Square that checks for an item	Item ID checked for	Message to show if you don't have the item	Item ID checked for
0D	Message square with a "Will you search?" at the end	The item you'll acquire	Message to display	The item you'll acquire (One of these may be a check to see if you have the item before displaying anything)
0E	Message square with a "Will you trade?" at the end	The item you'll acquire	Message to display	The item you'll trade away
0F	A forced battle	The monster or monsters you'll fight	Nothing!	The item you'll get for winning the fight
10	Another forced battle that works differently from 0F, but I don't know exactly how yet.	The monster or monsters you'll fight	Nothing!	(This is the byte that perplexes me right now)
16	A message square with a "Will you search?" that leads to a battle	The monster or monsters you'll fight	(??)	(??-maybe treasure you get for winning the fight. More research is needed)