IY
E654563
IY is one of the Zilog Z80 CPU’s 16-bit index registers, primarily used for indexed addressing operations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IY canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7304465 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: IY Context triple: [Zilog Z80, hasRegister, IY]
-
A.
YIA
YIA is the IATA airport code for Yogyakarta International Airport, the main commercial air gateway serving the Yogyakarta region in Indonesia.
-
B.
IJ
The IJ is a body of water in Amsterdam that serves as a key waterway for transport and shipping, separating the city center from Amsterdam-Noord.
-
C.
Ihy
Ihy is an ancient Egyptian god associated with music, joy, and childhood, often depicted as a child playing the sistrum and linked closely to his mother Hathor.
-
D.
ID-YO
ID-YO is the ISO 3166-2 code assigned to Indonesia’s Special Region of Yogyakarta.
-
E.
YAI
YAI is the IATA airport code for General Bernardo O'Higgins Airport serving the city of Chillán in Chile.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: IY Target entity description: IY is one of the Zilog Z80 CPU’s 16-bit index registers, primarily used for indexed addressing operations.
-
A.
YIA
YIA is the IATA airport code for Yogyakarta International Airport, the main commercial air gateway serving the Yogyakarta region in Indonesia.
-
B.
IJ
The IJ is a body of water in Amsterdam that serves as a key waterway for transport and shipping, separating the city center from Amsterdam-Noord.
-
C.
Ihy
Ihy is an ancient Egyptian god associated with music, joy, and childhood, often depicted as a child playing the sistrum and linked closely to his mother Hathor.
-
D.
ID-YO
ID-YO is the ISO 3166-2 code assigned to Indonesia’s Special Region of Yogyakarta.
-
E.
YAI
YAI is the IATA airport code for General Bernardo O'Higgins Airport serving the city of Chillán in Chile.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
CPU register
ⓘ
Zilog Z80 architecture component ⓘ index register ⓘ |
| addressingModeSupport | indexed with displacement ⓘ |
| architecture |
8-bit Zilog Z80
ⓘ
linked to:
Zilog Z80
|
| bitWidth | 16-bit ⓘ |
| canBeDecrementedByInstruction | DEC IY ⓘ |
| canBeExchangedByInstruction | EX (SP),IY ⓘ |
| canBeIncrementedByInstruction | INC IY ⓘ |
| canBeLoadedByInstruction | LD IY,nn ⓘ |
| canBePoppedByInstruction | POP IY ⓘ |
| canBePushedByInstruction | PUSH IY ⓘ |
| canHold |
16-bit memory address
ⓘ
16-bit offset base ⓘ |
| distinctFrom |
HL
ⓘ
IX ⓘ PC ⓘ SP ⓘ |
| encodingPrefix | FD ⓘ |
| hasHighByte | IYH ⓘ |
| hasLowByte | IYL ⓘ |
| hasRole | index base register ⓘ |
| introducedIn | Zilog Z80 instruction set ⓘ |
| partOf |
Zilog Z80 CPU
ⓘ
linked to:
Zilog Z80
|
| primaryFunction | base for indexed memory references with displacement ⓘ |
| registerClass | general-purpose index register ⓘ |
| similarTo | IX ⓘ |
| typicalUse |
accessing data structures
ⓘ
accessing stack frames ⓘ |
| usedBy | Z80 assembly language programmers ⓘ |
| usedFor |
indexed addressing
ⓘ
memory addressing ⓘ |
| usedInInstructionForm |
ADD IY,ss
ⓘ
BIT b,(IY+d) ⓘ LD (IY+d),r ⓘ LD r,(IY+d) ⓘ RES b,(IY+d) ⓘ SET b,(IY+d) ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: IY Description of subject: IY is one of the Zilog Z80 CPU’s 16-bit index registers, primarily used for indexed addressing operations.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.