Unibus
E697041
Unibus is a classic computer bus architecture developed by Digital Equipment Corporation for its PDP-11 minicomputers, enabling communication between the CPU, memory, and peripherals over a single shared pathway.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Unibus canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7920749 — 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: Unibus Context triple: [PDP-11, hasBusArchitecture, Unibus]
-
A.
Buss
Buss is a surname most notably associated with David M. Buss, an influential American evolutionary psychologist known for his work on human mating strategies.
-
B.
Optibús
Optibús is the bus rapid transit (BRT) system serving the city of León in the Mexican state of Guanajuato.
-
C.
Yolobus
Yolobus is a public transit bus system serving Yolo County and surrounding areas in Northern California, providing regional connections including service into Sacramento.
-
D.
Superbus
Superbus is the cognomen of Lucius Tarquinius Superbus, the legendary seventh and last king of Rome, whose tyrannical rule led to the establishment of the Roman Republic.
-
E.
Para Transpo
Para Transpo is Ottawa’s specialized door-to-door public transit service providing accessible transportation for people with disabilities who cannot use conventional buses.
- 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: Unibus Target entity description: Unibus is a classic computer bus architecture developed by Digital Equipment Corporation for its PDP-11 minicomputers, enabling communication between the CPU, memory, and peripherals over a single shared pathway.
-
A.
Buss
Buss is a surname most notably associated with David M. Buss, an influential American evolutionary psychologist known for his work on human mating strategies.
-
B.
Optibús
Optibús is the bus rapid transit (BRT) system serving the city of León in the Mexican state of Guanajuato.
-
C.
Yolobus
Yolobus is a public transit bus system serving Yolo County and surrounding areas in Northern California, providing regional connections including service into Sacramento.
-
D.
Superbus
Superbus is the cognomen of Lucius Tarquinius Superbus, the legendary seventh and last king of Rome, whose tyrannical rule led to the establishment of the Roman Republic.
-
E.
Para Transpo
Para Transpo is Ottawa’s specialized door-to-door public transit service providing accessible transportation for people with disabilities who cannot use conventional buses.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
bus architecture
ⓘ
computer bus ⓘ |
| addressSpace |
128 kilobytes
ⓘ
256 kilowords ⓘ |
| addressWidth | 18-bit ⓘ |
| architectureType | shared bus ⓘ |
| connects |
central processing unit
ⓘ
controllers ⓘ main memory ⓘ peripheral devices ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| dataWidth | 16-bit ⓘ |
| designGoal | unify I/O and memory access on a single bus ⓘ |
| developer | Digital Equipment Corporation NERFINISHED ⓘ |
| era |
1970s
ⓘ
late 1960s ⓘ |
| hasFeature |
arbitration logic
ⓘ
bus grant lines ⓘ bus request lines ⓘ byte and word transfers ⓘ master-slave protocol ⓘ separate control, address, and data lines ⓘ |
| influenced |
Q-bus
NERFINISHED
ⓘ
later DEC bus designs ⓘ |
| introducedBy | Digital Equipment Corporation NERFINISHED ⓘ |
| introducedInProductLine | PDP-11 NERFINISHED ⓘ |
| manufacturer | Digital Equipment Corporation NERFINISHED ⓘ |
| marketedAs | UNIBUS NERFINISHED ⓘ |
| notableFor |
simplicity of interface for third-party peripherals
ⓘ
unifying memory and I/O on one bus ⓘ |
| replacedBy |
Massbus in some DEC systems
ⓘ
Q-bus NERFINISHED ⓘ |
| signalType | asynchronous ⓘ |
| supports |
CPU-memory communication
ⓘ
CPU-peripheral communication ⓘ direct memory access ⓘ interrupts ⓘ memory-mapped I/O ⓘ memory-peripheral communication ⓘ vector interrupts ⓘ |
| usedFor | minicomputers ⓘ |
| usedIn |
PDP-11
NERFINISHED
ⓘ
PDP-11 minicomputer family NERFINISHED ⓘ PDP-11/20 NERFINISHED ⓘ PDP-11/45 NERFINISHED ⓘ PDP-11/70 NERFINISHED ⓘ VAX-11/780 NERFINISHED ⓘ early VAX systems ⓘ |
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: Unibus Description of subject: Unibus is a classic computer bus architecture developed by Digital Equipment Corporation for its PDP-11 minicomputers, enabling communication between the CPU, memory, and peripherals over a single shared pathway.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.