I use VHDL and altera FPGAs.
But the FPGA vendor shouldnt really matter much.
I have VGA video stream coming into the system
at just over 25Mhz at 60FPS at 640 x 480 valid pixels.
Currently I am sending output to a frame grabber via
camera link style output.
It would be nice if there was some code out there that was
video format agnostic - it wouldnt care about the video timing
to be able to insert a white (or black) pixel here and there to form
the letters
of ascii text I am trying to achieve.

Brad Smallridge wrote:
> > Really
> > what I want is a function that would
> > convert the value of a register into say, hex or base 10 ascii text,
> > and then count the number of
> > rows/columns of video coming in, and insert black or white pixels into
> > the video stream as appropriate to make those characters appear
> > (superimposed) on the output video stream.
>
> Yeah. I might be able to help although I don't know what you are
> using. Xilinx? Spartans? Virtex? VHDL? Verilog?
>
> Can we assume that you already have a VGA display that is outputting?
> And so can we assume that you have row and column registers in your
> design?
>
> Brad Smallridge
> AiVision dot com