Thomson EF936x
The Thomson EF936x series is a type of Graphic Display Processor (GDP). The chip could draw at 1 million pixels per second, which was relatively advanced for the time of its release (1982 or earlier). There are various versions of the chip (EF9364, EF9365, etc.), with slightly different capabilities.

In 1982 Commodore released a "High Resolution Graphics" board for the PET based on the EF9365 and EF9366 chips, allowing it to display 512x512 or 512x256 resolution graphics.

The EF9366 was also used on the SMP-E353 graphic card for the Siemens  computer series and on the NDR-Klein-Computer introduced in 1984.

Version EF9369 was used on computers such as the Thomson TO8, Thomson TO9 and Thomson TO9+, from 1986 to 1989.

Versions
Based on the 1989 data book published by the company, the EF936x series was split into Graphics Controllers and Color Palette models.

Graphics Controllers
EF9364
EF9365 512×512 (interlaced), 256×256, 128×128, 64×64; 50Hz
EF9366 512×256 (noninterlaced); 50/60Hz
EF9367 1024×512 (interlaced), 1024x416 (interlaced); 50/60Hz 
Thomson-EFCIS marketed a competing part, the EF 9367, that offered different features for the French market (which used the SECAM video format).
SFF96364

Color Palette
EF9369 - 4-bit DACs (16 out of 4096 colors), generated gamma corrected (gamma 2.8) voltages.
TS9370 - 4-bit DACs (16 out of 4096 colors)

Capabilities
Integrated DRAM controller
Linedrawing, with delta-x and delta-y limited to 255 each. Support for solid, dotted, dashed and dotted/dashed lines.
Built-in 5×8 pixel ASCII font. Support for rendering tilted characters, and scaling by integer factors (no antialiasing)
Clear screen
Light Pen support

The GPUs did not support direct access to the graphics memory, although a special command was provided to aid in implementing access to individual memory words.

See also
Thomson EF934x
Thomson TO8
Thomson TO9
Thomson TO9+
NDR-Klein-Computer
Commodore PET
List of home computers by video hardware

References

External links
 Full schematics
 PCB

Graphics chips
Thomson computers