Q-bus
E697042
Q-bus is a computer bus architecture developed by Digital Equipment Corporation for its PDP-11 and early VAX systems, providing a cost-effective, multiplexed alternative to the earlier Unibus.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Q-bus canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T7920750 — 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: Q-bus Context triple: [PDP-11, hasBusArchitecture, Q-bus]
-
A.
Cbus
Cbus is a common nickname for Columbus, the capital and largest city of Ohio.
-
B.
Multibus
Multibus is an early Intel-developed computer bus standard widely used in 1980s workstations and embedded systems for modular expansion and peripheral connectivity.
-
C.
M Bridge
M Bridge is the common nickname for the Hernando de Soto Bridge, a steel through-arch bridge carrying Interstate 40 across the Mississippi River between Memphis, Tennessee, and West Memphis, Arkansas.
-
D.
IC Bus
IC Bus is an American manufacturer of school and commercial buses, known for producing yellow school buses commonly used across North America.
-
E.
Hirschmann
Hirschmann is a surname of German origin borne by various notable individuals across fields such as diplomacy, engineering, and academia.
- 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: Q-bus Target entity description: Q-bus is a computer bus architecture developed by Digital Equipment Corporation for its PDP-11 and early VAX systems, providing a cost-effective, multiplexed alternative to the earlier Unibus.
-
A.
Cbus
Cbus is a common nickname for Columbus, the capital and largest city of Ohio.
-
B.
Multibus
Multibus is an early Intel-developed computer bus standard widely used in 1980s workstations and embedded systems for modular expansion and peripheral connectivity.
-
C.
M Bridge
M Bridge is the common nickname for the Hernando de Soto Bridge, a steel through-arch bridge carrying Interstate 40 across the Mississippi River between Memphis, Tennessee, and West Memphis, Arkansas.
-
D.
IC Bus
IC Bus is an American manufacturer of school and commercial buses, known for producing yellow school buses commonly used across North America.
-
E.
Hirschmann
Hirschmann is a surname of German origin borne by various notable individuals across fields such as diplomacy, engineering, and academia.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
computer bus architecture
ⓘ
system bus ⓘ |
| addressSpaceType | shared address and data lines ⓘ |
| architectureFamily | DEC bus architectures ⓘ |
| belongsTo |
PDP-11 architecture ecosystem
ⓘ
linked to:
PDP-11
VAX architecture ecosystem ⓘ |
| compatibleWith | various DEC peripheral controllers ⓘ |
| designedFor |
PDP-11 minicomputers
ⓘ
linked to:
PDP-11
low-cost system configurations ⓘ minicomputers ⓘ |
| developer | Digital Equipment Corporation ⓘ |
| electricalType | parallel bus ⓘ |
| hasAdvantageOver |
Unibus in board count reduction
ⓘ
Unibus in cost ⓘ Unibus in wiring complexity reduction ⓘ |
| hasCharacteristic |
cost-effective design
ⓘ
multiplexed bus ⓘ |
| hasFeature |
arbitration for bus mastership
ⓘ
memory-mapped I/O ⓘ vector interrupts ⓘ |
| hasNameVariant | QBUS ⓘ |
| introducedBy | Digital Equipment Corporation ⓘ |
| isAlternativeTo | Unibus ⓘ |
| manufacturer | Digital Equipment Corporation ⓘ |
| marketRole | lower-cost alternative to Unibus-based systems ⓘ |
| replaced | Unibus ⓘ |
| signalType | multiplexed address/data lines ⓘ |
| supports |
16-bit data paths in many implementations
ⓘ
DMA transfers ⓘ I/O device connections ⓘ byte and word data transfers ⓘ extended addressing in later implementations ⓘ interrupt handling ⓘ memory transfers ⓘ multiple bus masters ⓘ |
| topology | backplane bus ⓘ |
| usedDuring |
1980s
ⓘ
early 1990s ⓘ late 1970s ⓘ |
| usedFor |
connecting CPU, memory, and peripherals
ⓘ
expansion of PDP-11 and VAX systems via plug-in cards ⓘ |
| usedIn |
MicroVAX systems
ⓘ
linked to:
MicroVAX
PDP-11 ⓘ VAX ⓘ early VAX systems ⓘ embedded and industrial PDP-11 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: Q-bus Description of subject: Q-bus is a computer bus architecture developed by Digital Equipment Corporation for its PDP-11 and early VAX systems, providing a cost-effective, multiplexed alternative to the earlier Unibus.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.