Thomson EF9345

The EF9345 from SGS-Thomson Microelectronics, Inc., was a semigraphic[1] microprocessor for video image control,[1] encapsulated in a 40-pin DIP and used primarily in the Matra Alice 32,[2] Matra Alice 90[3] and Philips VG5000 microcomputers.[4]

EF9345 pinout

It was compatible with the Motorola MC6847 and capable of displaying 8 colors (RGB primaries), 128 alphanumeric characters and 128 semigraphic characters.[5] It had one semigraphic mode, two text modes and eight graphic modes.[5] It was able to access 16KB of video RAM, although the Matra Alice hardware only used 8KB.

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:
    • 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:
    • Styles: blinking, underlining, reverse, color

See also

References
  1. http://www.bitsavers.org/components/stMicroelectronics/_dataBooks/Graphic_Processors_Data_Book_Mar89.pdf
  2. https://www.old-computers.com/museum/computer.asp?c=60
  3. https://www.old-computers.com/museum/computer.asp?c=61
  4. http://vg5k.free.fr/index.php?gosub=sEJ-gF15F]dO5WnKt4BAeCwE
  5. https://www.goto10.fr/minitel/specifications/ef9345.pdf
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