Texas Instruments TMS9918-derived VDP
E739775
The Texas Instruments TMS9918-derived VDP is a video display processor used in early home computers and game consoles that expanded on the original TMS9918’s tile- and sprite-based graphics capabilities.
All labels observed (6)
| Label | Occurrences |
|---|---|
| TMS9918 video display processor | 1 |
| TMS9918A | 1 |
| Texas Instruments TMS9918 | 1 |
| Texas Instruments TMS9918-derived VDP canonical | 1 |
| Texas Instruments TMS9918A | 1 |
| Texas Instruments TMS9928A | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8521118 — 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: Texas Instruments TMS9918-derived VDP Context triple: [Sega Master System, graphicsChip, Texas Instruments TMS9918-derived VDP]
-
A.
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.
-
B.
Texas Instruments SN76489
The Texas Instruments SN76489 is a classic programmable sound generator chip widely used in early home computers and game consoles to produce simple three-voice music and sound effects.
-
C.
Fujitsu FM-7
The Fujitsu FM-7 is a Japanese 8-bit home computer from the early 1980s, known for its advanced graphics and sound capabilities and popularity among hobbyists and game developers.
-
D.
TI-99/4A
The TI-99/4A is a home computer released by Texas Instruments in the early 1980s, notable for being one of the first 16-bit consumer machines and competing with systems like the Atari 8-bit and Commodore 64.
-
E.
Ricoh 2C02 PPU
The Ricoh 2C02 PPU is the custom picture processing unit that generates the NES’s 2D graphics, including sprites, backgrounds, and color output.
- 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: Texas Instruments TMS9918-derived VDP Target entity description: The Texas Instruments TMS9918-derived VDP is a video display processor used in early home computers and game consoles that expanded on the original TMS9918’s tile- and sprite-based graphics capabilities.
-
A.
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.
-
B.
Texas Instruments SN76489
The Texas Instruments SN76489 is a classic programmable sound generator chip widely used in early home computers and game consoles to produce simple three-voice music and sound effects.
-
C.
Fujitsu FM-7
The Fujitsu FM-7 is a Japanese 8-bit home computer from the early 1980s, known for its advanced graphics and sound capabilities and popularity among hobbyists and game developers.
-
D.
TI-99/4A
The TI-99/4A is a home computer released by Texas Instruments in the early 1980s, notable for being one of the first 16-bit consumer machines and competing with systems like the Atari 8-bit and Commodore 64.
-
E.
Ricoh 2C02 PPU
The Ricoh 2C02 PPU is the custom picture processing unit that generates the NES’s 2D graphics, including sprites, backgrounds, and color output.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | video display processor ⓘ |
| basedOn |
Texas Instruments TMS9918
ⓘ
linked to:
Texas Instruments TMS9918-derived VDP
|
| busInterface | 8-bit host interface ⓘ |
| colorPaletteSize | 16 colors (typical, TMS9918 family) ⓘ |
| controlInterface | control registers ⓘ |
| designedFor | low-cost home systems ⓘ |
| feature |
character tiles
ⓘ
color tables ⓘ graphics mode ⓘ hardware scrolling support (model-dependent) ⓘ hardware sprites ⓘ multicolor mode ⓘ multiple screen modes ⓘ name tables ⓘ pattern tables ⓘ text mode ⓘ |
| generation | 8-bit era ⓘ |
| graphicsArchitecture |
sprite-based graphics
ⓘ
tile-based graphics ⓘ |
| influenced |
MSX VDP architecture
ⓘ
later tile/sprite-based console GPUs ⓘ |
| introduced | early 1980s (family timeframe) ⓘ |
| limitation |
fixed 16-color palette (family characteristic)
ⓘ
limited sprites per scanline ⓘ no hardware bitmap scrolling in base design ⓘ |
| manufacturer | Texas Instruments ⓘ |
| maxSpritesOnScreen | 32 sprites (typical, TMS9918 family) ⓘ |
| maxSpritesPerScanline | 4 sprites (typical, TMS9918 family) ⓘ |
| memoryAccess | indirect register-based VRAM access ⓘ |
| optimization | efficient 2D graphics rendering ⓘ |
| outputSignal |
NTSC or PAL (variant-dependent)
ⓘ
linked to:
NTSC color television standard
composite video (typical, TMS9918 family) ⓘ |
| supports |
hardware sprite priority
ⓘ
interrupt generation on vertical blank ⓘ sprite collision detection flag ⓘ |
| targetCPUPlatforms |
TMS9900-based systems (e.g., TI-99/4A)
ⓘ
Z80-based systems (e.g., MSX, ColecoVision, SG-1000) ⓘ |
| technology | NMOS integrated circuit ⓘ |
| usedIn |
ColecoVision game console (TMS9928A-derived VDP)
ⓘ
MSX home computers (TMS9918A-derived VDPs) ⓘ Sega SG-1000 game console (TMS9918A-derived VDP) ⓘ TI-99/4A home computer (TMS9918A VDP) ⓘ
linked to:
TI-99/4A
early game consoles ⓘ early home computers ⓘ |
| vramInterface | separate video RAM ⓘ |
| vramSize | 16 KB VRAM (typical, TMS9918 family) ⓘ |
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: Texas Instruments TMS9918-derived VDP Description of subject: The Texas Instruments TMS9918-derived VDP is a video display processor used in early home computers and game consoles that expanded on the original TMS9918’s tile- and sprite-based graphics capabilities.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Texas Instruments TMS9918-derived VDP
linked to: Texas Instruments TMS9918-derived VDP
linked to: Texas Instruments TMS9918-derived VDP
linked to: Texas Instruments TMS9918-derived VDP
linked to: Texas Instruments TMS9918-derived VDP