It might be a pointer problem.
fread takes a char* as 1st argument, not a char.

fread(&currentByte, 1, 1, file);
dispHex(currentByte);

Here's a nice photo!

I've cleaned up the screen :p

Glad you found a use for my pic

Wow those pictures are incredible!  Is there any sort of dithering involved?

There is certainly "something".
The pictures look much better on the true hardware that on the emulator.

Updated:
http://ti.bank.free.fr/index.php?mod=archives&ac=voir&id=2014

Fixed severall little bugs:
- the text console was loosing 1 character when reaching the bottom of the screen
- the browser scrolling was bad if there were more than 2 pages of files
- RLE compressed bitmaps were not read correctly if the 0x00FF escape command was found

Remaining bug:
- if the image has been scrolled (top-left corner offset is not null), the zoom in/out is "sometimes" not centered properly.


I've mentioned Omnimaga for the tests in the readme.

I read on hackspire that the LCD driver supports 8 bit gs. Could this be a possibility for a future version?

It's not 256-level grayscale, it's 8-bit pixel data. The 8 bits are used to look up color values in a palette.

Yes. The array is located at 0xC0000200 (full info at http://hackspire.unsads.com/wiki/index.php/Memory-mapped_I/O_ports#C0000000_-_LCD_controller)