Comment by carussell

Funny you say that. Here's what I created for my personal use:

http://files.carussell.fastmail.fm/public/ascii-print-screen...

I think the horizontal layout is a lot more readable, especially with the ability to read the bitstring more-or-less left-to-right. Only thing is that it's pretty wide—maybe too wide. The document that screenshot is from is meant to take up an A3 sheet split in half lengthwise. Someone willing to spend more time on it than I was would probably be able come up with helpful notes for the bottom half, or shift things around so elements corresponding to the low bit in the upper nibble are nestled below the items where that bit is off.