WDC 65C816 CPU
E1045989
The WDC 65C816 CPU is a 16-bit extension of the 6502 microprocessor family, widely known for powering systems like the Apple IIGS with enhanced memory addressing and performance capabilities.
All labels observed (2)
| Label | Occurrences |
|---|---|
| WDC 65C816 | 1 |
| WDC 65C816 CPU canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13498324 — 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: WDC 65C816 CPU Context triple: [GS/OS, designedFor, WDC 65C816 CPU]
-
A.
Motorola 6809
The Motorola 6809 is an 8-bit microprocessor introduced in the late 1970s, notable for its advanced instruction set, powerful addressing modes, and use in early home computers and embedded systems.
-
B.
Motorola 68010
The Motorola 68010 is a 16/32-bit CISC microprocessor, an enhanced and more efficient successor to the Motorola 68000 widely used in early workstations and computers.
-
C.
Motorola 6802
The Motorola 6802 is an 8-bit microprocessor, compatible with the 6800 family, that integrates an internal clock oscillator and on-chip RAM for use in embedded systems and early microcomputer designs.
-
D.
Motorola 68881
The Motorola 68881 is a floating-point coprocessor for Motorola 68000-series CPUs, providing hardware-accelerated arithmetic operations for improved performance in computing systems.
-
E.
MOS Technology VIC-II
The MOS Technology VIC-II is the video interface chip that powered the Commodore 64’s distinctive graphics and sprite capabilities, making it one of the most iconic home computer graphics processors of the 1980s.
- 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: WDC 65C816 CPU Target entity description: The WDC 65C816 CPU is a 16-bit extension of the 6502 microprocessor family, widely known for powering systems like the Apple IIGS with enhanced memory addressing and performance capabilities.
-
A.
Motorola 6809
The Motorola 6809 is an 8-bit microprocessor introduced in the late 1970s, notable for its advanced instruction set, powerful addressing modes, and use in early home computers and embedded systems.
-
B.
Motorola 68010
The Motorola 68010 is a 16/32-bit CISC microprocessor, an enhanced and more efficient successor to the Motorola 68000 widely used in early workstations and computers.
-
C.
Motorola 6802
The Motorola 6802 is an 8-bit microprocessor, compatible with the 6800 family, that integrates an internal clock oscillator and on-chip RAM for use in embedded systems and early microcomputer designs.
-
D.
Motorola 68881
The Motorola 68881 is a floating-point coprocessor for Motorola 68000-series CPUs, providing hardware-accelerated arithmetic operations for improved performance in computing systems.
-
E.
MOS Technology VIC-II
The MOS Technology VIC-II is the video interface chip that powered the Commodore 64’s distinctive graphics and sprite capabilities, making it one of the most iconic home computer graphics processors of the 1980s.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
16-bit microprocessor
ⓘ
microprocessor ⓘ |
| addressBusWidth | 24-bit ⓘ |
| alsoKnownAs |
65C816
NERFINISHED
ⓘ
W65C816 NERFINISHED ⓘ |
| architectureFamily | MOS Technology 6502 NERFINISHED ⓘ |
| backwardCompatibilityGoal | support existing 6502 software ⓘ |
| clockSpeedRange | typically up to several MHz ⓘ |
| dataBusWidth | 8-bit ⓘ |
| designer | Western Design Center NERFINISHED ⓘ |
| directPageSize | 256 bytes ⓘ |
| documentationPublisher | Western Design Center NERFINISHED ⓘ |
| emulationModeAccumulatorSize | 8-bit ⓘ |
| emulationModeIndexRegisterSize | 8-bit ⓘ |
| emulationModeVectorBank | bank 0 ⓘ |
| hasDecimalMode | true ⓘ |
| instructionSetCompatibility | binary compatible with 6502 in emulation mode ⓘ |
| introduced | mid-1980s ⓘ |
| isExtensionOf | WDC 65C02 NERFINISHED ⓘ |
| longAddressWidth | 24-bit ⓘ |
| market |
embedded systems
ⓘ
personal computers (1980s) ⓘ |
| maxAddressableMemory | 16 megabytes ⓘ |
| nativeModeAccumulatorSize | 16-bit ⓘ |
| nativeModeIndexRegisterSize | 16-bit ⓘ |
| nativeModeVectorBank | bank 0 ⓘ |
| powerConsumption | lower than NMOS 6502 ⓘ |
| resetVectorLocation | bank 0, addresses FFFC–FFFD ⓘ |
| stackPage | bank 0 ⓘ |
| stackPointerWidth | 16-bit in native mode ⓘ |
| statusRegisterWidth | 8-bit ⓘ |
| supports16BitImmediateOperands | true GENERATED ⓘ |
| supportsBankSwitching | true GENERATED ⓘ |
| supportsBlockMoveInstructions | true ⓘ |
| supportsDirectPageRegister | true GENERATED ⓘ |
| supportsInterrupt |
ABORT
ⓘ
COP ⓘ IRQ ⓘ NMI ⓘ RESET ⓘ |
| supportsLongAddressing | true GENERATED ⓘ |
| supportsMode |
emulation mode
ⓘ
native mode ⓘ |
| supportsMVNInstruction | true GENERATED ⓘ |
| supportsMVPInstruction | true GENERATED ⓘ |
| supportsStackRelativeAddressing | true GENERATED ⓘ |
| technology | CMOS ⓘ |
| usedIn |
Apple IIGS
NERFINISHED
ⓘ
Atari 5200 development systems (some variants) NERFINISHED ⓘ Super Nintendo Entertainment System main CPU variant (Ricoh 5A22) NERFINISHED ⓘ |
| wordSize | 16-bit ⓘ |
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: WDC 65C816 CPU Description of subject: The WDC 65C816 CPU is a 16-bit extension of the 6502 microprocessor family, widely known for powering systems like the Apple IIGS with enhanced memory addressing and performance capabilities.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
WDC 65C816