Thomson EF9345

{{Short description|Semigraphic microprocessor by SGS-Thomson Microelectronics}}

File:EF9345P pinout.pngThe EF9345 from SGS-Thomson Microelectronics, Inc., was a semigraphic{{Cite book |url=http://www.bitsavers.org/components/stMicroelectronics/_dataBooks/Graphic_Processors_Data_Book_Mar89.pdf |title=Graphic Processors Databook |publisher=SGS Thomson |date=March 1989 |pages=13}} single chip microprocessor for video image control, encapsulated in a 40-pin DIP and used primarily in the Matra Alice 32,{{Cite web |title=MATRA HACHETTE ALICE |url=https://www.old-computers.com/museum/computer.asp?c=60 |url-status=live |archive-url=https://web.archive.org/web/20211003223344/https://www.old-computers.com/museum/computer.asp?c=60 |archive-date=2021-10-03 |access-date=2021-10-03 |website=old-computers.com}} Matra Alice 90{{Cite web |title=MATRA HACHETTE ALICE 90 |url=https://www.old-computers.com/museum/computer.asp?c=61 |url-status=live |archive-url=https://web.archive.org/web/20211003223344/https://www.old-computers.com/museum/computer.asp?c=61 |archive-date=2021-10-03 |access-date=2021-10-03 |website=old-computers.com}} and Philips VG5000 microcomputers.{{Cite web |last1=Hervier |first1=Carl |last2=Vanlierde |first2=Stéphane |date=2023 |title=La vidéo du VG5000 |url=http://vg5k.free.fr/index.php?gosub=sEJ-gF15F]dO5WnKt4BAeCwE |url-status=live |archive-url=https://web.archive.org/web/20210821174114/http://vg5k.free.fr/index.php?gosub=sEJ-gF15F]dO5WnKt4BAeCwE |archive-date=2021-08-21 |access-date=2021-10-03 |website=La page de fans du VG 5000µ}} 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.{{Cite book |url=https://www.goto10.fr/minitel/specifications/ef9345.pdf |title=EF9345 HMOS2 SINGLE CHIP SEMI-GRAPHIC DISPLAY PROCESSOR |publisher=SGS Thomson |date=March 1995}} 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 5×7 pixel font dimensions. User definable 8×10 pixel alphanumeric or semigraphic sets.
40 characters × 25 rows text mode (similar to teletext):
8 × 10 pixel font
Selectable background and foreground colors
Styles: double height, double width, blinking, reverse, underline, conceal, insert, accentuation of lowercase characters
80 characters × 25 rows text mode:
6 × 10 pixel font
Styles: blinking, underlining, reverse, color
8 colors (3-bit RGB palette):

:Image:RGB 3bits palette.png

On-Chip Character Generator

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

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colspan="9" style="background-color:#EAECF0;" \| G0 Alphanumeric Character Set in 40 or 80 Character/Row Mode
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1 \| Â \| ± \| ! \| 1 \| A \| Q \| a \| q
2 \| É \| é \| " \| 2 \| B \| R \| b \| r
3 \| £ \| ë \| # \| 3 \| C \| S \| c \| s
4 \| â \| ï \| $ \| 4 \| D \| T \| d \| t
5 \| Ç \| ç \| % \| 5 \| E \| U \| e \| u
6 \| Ë \| û \| & \| 6 \| F \| V \| f \| v
7 \| À \| à \| ' \| 7 \| G \| W \| g \| w
8 \| Ù \| ÷ \| ( \| 8 \| H \| X \| h \| x
9 \| È \| è \| ) \| 9 \| I \| Y \| i \| y
A \| Œ \| œ \| * \| : \| J \| Z \| j \| z
B \| Ê \| ê \| + \| ; \| K \| [ \| k \| ▏
C \| ← \| ¼ \| , \| < \| L \| \ \| l \| │
D \| î \| ½ \| - \| = \| M \| ] \| m \| ▕
E \| → \| ¾ \| . \| > \| N \| ↑ \| n \| ▔
F \| ↓ \| ô \| / \| ? \| O \| ▁ \| o \| █

class="wikitable"

colspan="9" style="background-color:#EAECF0;" | G0 Alphanumeric Character Set in 40 or 80 Character/Row Mode

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class="wikitable"
colspan="9" style="background-color:#EAECF0;" \| G0 Alphanumeric Character Set in 40 Character/Row Mode - R003
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3 \| £ \| § \| # \| 3 \| C \| S \| c \| s
4 \| ÷ \| ` \| $ \| 4 \| D \| T \| d \| t
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8 \| Ü \| à \| ( \| 8 \| H \| X \| h \| x
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E \| → \| ¾ \| . \| > \| N \| ^ \| n \| ~
F \| ↓ \| ô \| / \| ? \| O \| ▁ \| o \| █

class="wikitable"

colspan="9" style="background-color:#EAECF0;" | G0 Alphanumeric Character Set in 40 Character/Row Mode - R003

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class="wikitable" ! colspan="9" \|G0 Alphanumeric Character Set in 40 Character/Row Mode - R005
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class="wikitable" style="text-align:center;"

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! colspan="5" style="text-align:center; font-weight:bold; background-color:#F8F8F8; color:#202122;" | G10 Semigraphic Character Set (videotex compatible)

style="vertical-align:middle; background-color:#F8F8F8; color:#202122;"

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