Twinhead
        Twinhead will most likely be remembered for their laptop computers, but they started out manufacturing their own graphics cards.
         
         
        
          
          
CT-6040R
         Launched: 1986? 
          Bus: ISA 8-bit. 
           
        A Hercules monochrome compatible card with Centronics parallel port. 
         
   
 
  
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            CT-6040S
               Launched: 1986? 
                Bus: ISA 8-bit. 
                FCC ID: FKG453CT-6040S, FKG455CT-6040S
                 
   
            A Hercules monochrome compatible card. Some variants came with a Centronics parallel port (FKG453CT) [see pics below] while others did not (FKG455CT). 
              More Images
              _455ct.jpg) 
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            CT-6040T
               Launched: 1987? 
                Bus: ISA 8-bit. 
            FCC ID: FKG455CT-6040T 
            A Hercules monochrome compatible card with Centronics parallel port.  | 
          
          
            CT-6190S "Magic Combo"
               Launched: 1987? 
                Bus: ISA 8-bit. 
                FCC ID:  
            A Hercules monochrome compatible card with Centronics parallel port. 
            More Images
                    
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