If some one not noticed it yet, the CDA graphics card text mode, it's using a "font" taken from the mighty Sinclair ZX Spectrum.
I did some research, and this could generate potential problems with who actually have the rights of all Sinclair stuff (Amstrad or who owns Amstrad), so we need a font for the text mode.
The font uses the Latin 1 charset ( http://en.wikipedia.org/wiki/ISO/IEC_8859-1
), so must have 256 characters. There is a few holes in the Latin 1 charset were we can put pseudo graphics characters. Each character is a 8x8 pixel square. The bitmap must be in B&W, were the White is the background colour. The full image with all the characters, could be of any size if have the 256 characters snapping to a grid of 8x8 (for example 2048x8 or 8x2048 or 256x64, etc... )
I attach the actual font in a gif, as example :