The EF9345 from SGS-Thomson Microelectronics, Inc., was a

semigraphic Text-based semigraphics or pseudographics is a primitive method used in early text mode video hardware to emulate raster graphics without having to implement the logic for such a display mode. There are two different ways to accomplish the emu ...

microprocessor A microprocessor is a computer processor where the data processing logic and control is included on a single integrated circuit, or a small number of integrated circuits. The microprocessor contains the arithmetic, logic, and control circu ...

for video image control, encapsulated in a 40-pin DIP and used primarily in the

Matra Alice The Matra & Hachette Ordinateur Alice is a home computer sold in France beginning in 1983. It was a clone of the TRS-80 MC-10, produced through a collaboration between Matra and Hachette in France and Tandy Corporation in the United States. T ...

32, Matra Alice 90 and

Philips VG5000 The VG5000μ is a computer created by Philips in 1984. It was manufactured in Le Mans by Radiotechnique (RTS) and marketed under the Philips, Radiotechnique, Radiola and Schneider Rundfunkwerke, Schneider brands. Not compatible with any other m ...

microcomputers A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PC ...

. The EF9345 was capable of displaying 8 colors ( RGB primaries), 128

alphanumeric Alphanumericals or alphanumeric characters are a combination of alphabetical and numerical characters. More specifically, they are the collection of Latin letters and Arabic digits. An alphanumeric code is an identifier made of alphanumeric ch ...

characters and 128

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 Progressive scanning (alternatively referred to as noninterlaced scanning) is a format of displaying, storing, or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to interlaced video used ...

*Semigraphics: ** 128 standard character set with 5x7 pixel font dimensions. User definable 8x10 pixel

or semigraphic sets. *40 characters x 25 rows text mode (similar to

teletext A British Ceefax football index page from October 2009, showing the three-digit page numbers for a variety of football news stories Teletext, or broadcast teletext, is a standard for displaying text and rudimentary graphics on suitably equipp ...

): ** 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. , 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 ,

References

{{reflist

External links

EF9345 datasheet
Graphics chips Character sets

Video Modes

On-Chip Character Generator

See also

References

External links