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Utility description

BnuView can be used to view the graphical data within a binary
file. Right now the supported file types are:

* bpp1: 1 bit per pixel, 2 color (ie. black/white) graphics.

* Game Boy: 2 bits per pixel, overlayed bytes, 4 color graphics.

* NES: 2 bits per pixel, overlayed tiles, 4 color graphics.

For the time being, the program doesn't load the entire file into
memory, so you should be able to view files as big as your operating
system supports.