Thanks Jope, I've rendered those locally and added Xcopy 8's bootable-dos format in as well for comparison. (I'll add a couple to the eligible set for the twitter feed)
Incidentally the images are predominantly red because obvious byte ranges are assigned a single colour (i.e. uppercase ascii = red, lowercase = blue) - the rest are from a high-contrast palette (generating a high-contrast palette for 255 values proved to be challenging, it generally resulted in a messy brown circle).
http://tools.medialab.sciences-po.fr/iwanthue/index.php - this was fun to play with though