I second that: PHP (from the command line) would be a great language to learn. Uses simple text files, no compiling, reasonable error messages, and it is enough like C/C++/JavaScript/Java that a person could transfer most of their experience into any of those languages.

Also, as I already stated, the MAX read is ~132 MB per second (33 MHz bus, 32 bits wide). There is no way you could get a transfer rate of 200 MB per second.

I already hinted that the frame buffer format could be a bottle neck. For example, the frame buffer might not be in a 'normal' RGB or RGBA format. I could be in a format like ARBG, BRG, or even somehting exotic like RGBAZZZS (Z-buffer, Stencil buffer). And it is very likely the scan lines are not contiguous, so the padding will need to be skipped.