Motorola 68881
E272574
The Motorola 68881 is a floating-point coprocessor for Motorola 68000-series CPUs, providing hardware-accelerated arithmetic operations for improved performance in computing systems.
All labels observed (9)
| Label | Occurrences |
|---|---|
| Motorola 68882 | 10 |
| Motorola 68881 canonical | 5 |
| Motorola 68882 FPU | 2 |
| MC68881 | 1 |
| Motorola 68881 FPU | 1 |
| Motorola 68881 Floating-Point Coprocessor | 1 |
| Motorola 68882 FPU (optional) | 1 |
| Motorola 68882 Floating-Point Coprocessor | 1 |
| Motorola 68882-compatible FPU | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1775012 — 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: Motorola 68881 Context triple: [Linux/m68k, supportsFPU, Motorola 68881]
-
A.
Motorola 68851
The Motorola 68851 is an external paged memory management unit (MMU) designed to work with Motorola 68020 processors, providing advanced virtual memory and protection features.
-
B.
Motorola 68030 microprocessor
The Motorola 68030 microprocessor is a 32-bit CISC CPU from Motorola's 680x0 family, widely used in late-1980s and early-1990s workstations, servers, and personal computers such as early Apple Macintosh models.
-
C.
Motorola 68020 microprocessor
The Motorola 68020 microprocessor is a 32-bit CISC CPU introduced in the early 1980s that powered many workstations, servers, and Apple Macintosh computers, offering enhanced performance and features over its 68000-series predecessors.
-
D.
Motorola 68040 microprocessor
The Motorola 68040 microprocessor is a 32-bit CISC CPU from the Motorola 680x0 family, widely used in early 1990s workstations, servers, and Apple Macintosh computers for its integrated floating-point and memory management units.
-
E.
Motorola 68000 family
The Motorola 68000 family is a line of 16/32-bit CISC microprocessors widely used in early personal computers, workstations, and game consoles during the 1980s and early 1990s.
- 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: Motorola 68881 Target entity description: The Motorola 68881 is a floating-point coprocessor for Motorola 68000-series CPUs, providing hardware-accelerated arithmetic operations for improved performance in computing systems.
-
A.
Motorola 68851
The Motorola 68851 is an external paged memory management unit (MMU) designed to work with Motorola 68020 processors, providing advanced virtual memory and protection features.
-
B.
Motorola 68030 microprocessor
The Motorola 68030 microprocessor is a 32-bit CISC CPU from Motorola's 680x0 family, widely used in late-1980s and early-1990s workstations, servers, and personal computers such as early Apple Macintosh models.
-
C.
Motorola 68020 microprocessor
The Motorola 68020 microprocessor is a 32-bit CISC CPU introduced in the early 1980s that powered many workstations, servers, and Apple Macintosh computers, offering enhanced performance and features over its 68000-series predecessors.
-
D.
Motorola 68040 microprocessor
The Motorola 68040 microprocessor is a 32-bit CISC CPU from the Motorola 680x0 family, widely used in early 1990s workstations, servers, and Apple Macintosh computers for its integrated floating-point and memory management units.
-
E.
Motorola 68000 family
The Motorola 68000 family is a line of 16/32-bit CISC microprocessors widely used in early personal computers, workstations, and game consoles during the 1980s and early 1990s.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
floating-point unit
ⓘ
microprocessor ⓘ |
| architecture | Motorola 68000 family ⓘ |
| compatibleWith |
Motorola 68000 family CPUs
ⓘ
linked to:
Motorola 68000 family
Motorola 68020 ⓘ
linked to:
Motorola 68020 microprocessor
|
| dataBusWidth | 32-bit ⓘ |
| designedFor |
engineering applications
ⓘ
graphics applications ⓘ scientific computing ⓘ |
| era | 1980s microprocessors ⓘ |
| family |
Motorola 680x0 floating-point units
ⓘ
linked to:
Motorola 680x0 coprocessors
|
| hasFeature |
exception handling for floating-point operations
ⓘ
multiple rounding modes ⓘ rounding control ⓘ status flags for floating-point conditions ⓘ |
| hasRegister |
floating-point control registers
ⓘ
floating-point data registers ⓘ |
| improves | floating-point performance ⓘ |
| interface | coprocessor bus of 68020 ⓘ |
| introducedWith |
Motorola 68020 generation
ⓘ
linked to:
Motorola 68020 microprocessor
|
| manufacturer | Motorola ⓘ |
| marketedAs |
MC68881
ⓘ
linked to:
Motorola 68881
|
| offloadsFrom | integer CPU ⓘ |
| packageType | ceramic PGA ⓘ |
| purpose | hardware-accelerated floating-point arithmetic ⓘ |
| standard | IEEE 754-like floating-point arithmetic ⓘ |
| successor |
Motorola 68882
ⓘ
linked to:
Motorola 68881
|
| supportsMode |
asynchronous operation with host CPU
ⓘ
synchronous operation with host CPU ⓘ |
| supportsOperation |
floating-point addition
ⓘ
floating-point comparison ⓘ floating-point conversion ⓘ floating-point division ⓘ floating-point multiplication ⓘ floating-point subtraction ⓘ floating-point transcendental functions ⓘ |
| supportsPrecision |
double-precision floating point
ⓘ
extended-precision floating point ⓘ single-precision floating point ⓘ |
| technology | NMOS ⓘ |
| type | floating-point coprocessor ⓘ |
| usedIn |
embedded systems
ⓘ
high-end personal computers ⓘ workstations ⓘ |
| wordLength | 32-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: Motorola 68881 Description of subject: The Motorola 68881 is a floating-point coprocessor for Motorola 68000-series CPUs, providing hardware-accelerated arithmetic operations for improved performance in computing systems.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
subject linked to:
Motorola 68020 microprocessor
subject linked to:
Motorola 68020 microprocessor
linked to: Motorola 68881
subject linked to:
Motorola 68030 microprocessor
subject linked to:
Motorola 68030 microprocessor
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
subject linked to:
Atari Running on Any Machine
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881
linked to: Motorola 68881