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Thomson EF9345

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Semigraphic microprocessor by SGS-Thomson Microelectronics
EF9345 pinout

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
  • Semigraphics:
  • 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):

On-Chip Character Generator

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

G0 Alphanumeric Character Set in 40 or 80 Character/Row Mode
0x 1x 2x 3x 4x 5x 6x 7x
0 ⸮ º SP 0 @ P - p
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 █
G0 Alphanumeric Character Set in 40 Character/Row Mode - R003
0x 1x 2x 3x 4x 5x 6x 7x
0 ▔ º SP 0 @ P - p
1 ¨ ± ! 1 A Q a q
2 É é " 2 B R b r
3 £ § # 3 C S c s
4 ÷ ` $ 4 D T d t
5 Ç ç % 5 E U e u
6 Ä ä & 6 F V f v
7 Ö ẞ ´ 7 G W g w
8 Ü à ( 8 H X h x
9 È è ) 9 I Y i y
A Œ œ * : J Z j z
B ü ù + ; K [ k {
C ← ¼ , < L \ l │
D î ½ - = M ] m }
E → ¾ . > N ^ n ~
F ↓ ô / ? O ▁ o █
G0 Alphanumeric Character Set in 40 Character/Row Mode - R005
0x 1x 2x 3x 4x 5x 6x 7x
0 ~ º SP 0 @ P - p
1 § ± ! 1 A Q a q
2 ü é " 2 B R b r
3 £ ë # 3 C S c s
4 â ï $ 4 D T d t
5 } ç % 5 E U e u
6 ä û & 6 F V f v
7 ö à ' 7 G W g w
8 ù ÷ ( 8 H X h x
9 ẞ è ) 9 I Y i y
A Œ œ * : J Z j z
B { ê + ; K [ k ▏
C ← ¼ , < L \ l │
D î ½ - = M ] m ▕
E → ¾ . > N ↑ n ▔
F ↓ ô / ? O ▁ o █
G10 Semigraphic Character Set (videotex compatible)
4x 5x 6x 7x
0 SP 🬏 🬞 🬭
1 🬀 🬐 🬟 🬮
2 🬁 🬑 🬠 🬯
3 🬂 🬒 🬡 🬰
4 🬃 🬓 🬢 🬱
5 🬄 ▌ 🬣 🬲
6 🬅 🬔 🬤 🬳
7 🬆 🬕 🬥 🬴
8 🬇 🬖 🬦 🬵
9 🬈 🬗 🬧 🬶
A 🬉 🬘 ▐ 🬷
B 🬊 🬙 🬨 🬸
C 🬋 🬚 🬩 🬹
D 🬌 🬛 🬪 🬺
E 🬍 🬜 🬫 🬻
F 🬎 🬝 🬬 █
G11 Stroke Set
0x 1x
0
1 🮡 ╵
2 🮣 ╶
3 🮥 └
4 🮢 ╷
5 🮩 │
6 🮦 ┌
7 🮪 ├
8 🮠 ╴
9 🮧 ┘
A 🮨 ─
B 🮬 ┴
C 🮤 ┐
D 🮭 ┤
E 🮫 ┬
F 🮮 ┼
G20 Accentued Character Set
0x 1x 2x 3x
0 ¯ ´ `
1 ˙ ¨ ,
G21 Accentued Character Set - R000
0x 1x
0 - p
1 a q
2 b r
3 c s
4 d t
5 e u
6 f v
7 g w
8 h x
9 i y
A j z
B k ▏
C l │
D m ▕
E n ▔
F o █
G21 Accentued Character Set - R003
0x 1x
0 - p
1 a q
2 b r
3 c s
4 d t
5 e u
6 f v
7 g w
8 h x
9 i y
A j z
B k {
C l │
D m }
E n ~
F o █

See also

References

  1. ^ Graphic Processors Databook (PDF). SGS Thomson. March 1989. p. 13.
  2. "MATRA HACHETTE ALICE". old-computers.com. Archived from the original on 2021-10-03. Retrieved 2021-10-03.
  3. "MATRA HACHETTE ALICE 90". old-computers.com. Archived from the original on 2021-10-03. Retrieved 2021-10-03.
  4. Hervier, Carl; Vanlierde, Stéphane (2023). "La vidéo du VG5000". La page de fans du VG 5000µ. Archived from the original on 2021-08-21. Retrieved 2021-10-03.
  5. ^ EF9345 HMOS2 SINGLE CHIP SEMI-GRAPHIC DISPLAY PROCESSOR (PDF). SGS Thomson. March 1995.

External links

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