CRTC (Motorola 6845 compatible)
E532269
The CRTC (Motorola 6845 compatible) is a programmable CRT controller chip widely used in 8-bit and early 16-bit computers to generate video timings and manage text and graphics display output.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Motorola 6845 CRTC | 2 |
| CRTC (Motorola 6845 compatible) canonical | 1 |
| Motorola 6845 register set | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5558967 — 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: CRTC (Motorola 6845 compatible) Context triple: [Amstrad CPC, displayChip, CRTC (Motorola 6845 compatible)]
-
A.
CRTC
CRTC is Canada’s federal regulatory agency responsible for overseeing broadcasting and telecommunications services.
-
B.
Monochrome Display Adapter
Monochrome Display Adapter is an early IBM PC video display standard that supports only text output on a monochrome monitor, primarily used for business and word-processing applications.
-
C.
VDP (Video Display Processor)
The VDP (Video Display Processor) is the custom graphics chip used in Sega’s 16-bit era hardware, responsible for rendering sprites, backgrounds, and visual effects in games.
-
D.
NEC aperture grille CRTs
NEC aperture grille CRTs were high-quality cathode-ray tube computer and video displays that used an aperture grille design similar to Sony’s Trinitron to deliver sharp images and vibrant color.
-
E.
IBM Color/Graphics Monitor Adapter
The IBM Color/Graphics Monitor Adapter (CGA) is an early IBM PC graphics standard and expansion card that provided low-resolution color and text display capabilities for personal computers in 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: CRTC (Motorola 6845 compatible) Target entity description: The CRTC (Motorola 6845 compatible) is a programmable CRT controller chip widely used in 8-bit and early 16-bit computers to generate video timings and manage text and graphics display output.
-
A.
CRTC
CRTC is Canada’s federal regulatory agency responsible for overseeing broadcasting and telecommunications services.
-
B.
Monochrome Display Adapter
Monochrome Display Adapter is an early IBM PC video display standard that supports only text output on a monochrome monitor, primarily used for business and word-processing applications.
-
C.
VDP (Video Display Processor)
The VDP (Video Display Processor) is the custom graphics chip used in Sega’s 16-bit era hardware, responsible for rendering sprites, backgrounds, and visual effects in games.
-
D.
NEC aperture grille CRTs
NEC aperture grille CRTs were high-quality cathode-ray tube computer and video displays that used an aperture grille design similar to Sony’s Trinitron to deliver sharp images and vibrant color.
-
E.
IBM Color/Graphics Monitor Adapter
The IBM Color/Graphics Monitor Adapter (CGA) is an early IBM PC graphics standard and expansion card that provided low-resolution color and text display capabilities for personal computers in the 1980s.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
CRT controller chip
ⓘ
video display controller ⓘ |
| accesses | video RAM ⓘ |
| category | display hardware component ⓘ |
| communicatesVia | I/O registers ⓘ |
| communicatesWith | system CPU ⓘ |
| compatibleWith | Motorola 6845 ⓘ |
| controls |
CRT raster scanning
ⓘ
display enable timing ⓘ horizontal sync timing ⓘ vertical sync timing ⓘ |
| era | late 1970s and 1980s home and personal computers ⓘ |
| function |
generate video timing signals
ⓘ
manage graphics display output ⓘ manage text display output ⓘ |
| hasFeature |
cursor control
ⓘ
hardware scrolling via start address changes ⓘ programmable character cell size ⓘ programmable registers ⓘ programmable screen resolution parameters ⓘ start address register for display memory ⓘ |
| hasRegister |
cursor end register
ⓘ
cursor position registers ⓘ cursor start register ⓘ horizontal displayed register ⓘ horizontal total register ⓘ start address high register ⓘ start address low register ⓘ vertical displayed register ⓘ vertical total register ⓘ |
| hasSignal |
HSYNC output
ⓘ
VSYNC output ⓘ address outputs for video memory ⓘ display enable output ⓘ |
| influencedBy |
Motorola 6845 register set
ⓘ
linked to:
CRTC (Motorola 6845 compatible)
Motorola 6845 timing model ⓘ |
| outputTo |
CRT monitor interface circuitry
ⓘ
digital video signals ⓘ |
| requires |
external character generator ROM for text mode
ⓘ
external video shift register or logic for pixel serialization ⓘ |
| roleInSystem |
address generator for video memory scanning
ⓘ
timing generator for video subsystem ⓘ |
| supports |
character-based display organization
ⓘ
multiple rows and columns of text ⓘ |
| usedFor |
low-resolution graphics modes
ⓘ
text mode displays ⓘ |
| usedIn |
8-bit computers
ⓘ
early 16-bit computers ⓘ |
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: CRTC (Motorola 6845 compatible) Description of subject: The CRTC (Motorola 6845 compatible) is a programmable CRT controller chip widely used in 8-bit and early 16-bit computers to generate video timings and manage text and graphics display output.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: CRTC (Motorola 6845 compatible)
linked to: CRTC (Motorola 6845 compatible)
linked to: CRTC (Motorola 6845 compatible)