• Source: Thomson EF9345

The EF9345 from SGS-Thomson Microelectronics, Inc., was a semigraphic single chip microprocessor for video image control, encapsulated in a 40-pin DIP and used primarily in the Matra Alice 32, Matra Alice 90 and Philips VG5000 microcomputers. It was also the video processor of the Minitel 1b terminals, built by either Alcatel and Philips at more than 2 million of units.
The EF9345 was capable of displaying 8 colors (RGB primaries), 128 alphanumeric characters and 128 semigraphic characters. It had one semigraphic mode and 40- and 80-column text modes. It was able to address up to 16KB of dedicated video RAM.




Video Modes


50/60Hz output
Interlaced or progressive scan
Semigraphics:
128 standard character set with 5x7 pixel font dimensions. User definable 8x10 pixel alphanumeric or semigraphic sets.
40 characters x 25 rows text mode (similar to teletext):
8 x 10 pixel font
Selectable background and foreground colors
Styles: double height, double width, blinking, reverse, underline, conceal, insert, accentuation of lowercase characters
80 characters x 25 rows text mode:
6 x 10 pixel font
Styles: blinking, underlining, reverse, color
8 colors (3-bit RGB palette):




On-Chip Character Generator


The on-chip character generator offered several character sets, including alphanumeric and videotext compatible semigraphics.




See also


Thomson EF936x
Thomson EF9340 [VIN] & EF9341 [GEN] (precursory couple for this video processor)
Thomson EF9347 (successor of this video processor)
Motorola 6847
Motorola 6845
TMS9918
MOS Technology VIC-II
List of home computers by video hardware




References






External links


EF9345 datasheet

Kata Kunci Pencarian:

• Thomson EF9345
• Matra Alice
• Motorola 6847
• Semigraphics
• Philips VG5000
• Standard Television Interface Chip
• TEA1002
• List of home computers by video hardware