Step 8: Reception
I then proposed a challenge to a few of the more technically inclined invitees and I will pose the same challenge to you. There is a secret within the secret. There is some way to trigger the display of a second secret message (which you can easily find in the code). If you figure out the trigger, please post it in the comments along with a brief description of how you figured it out.
I've attached a zip file containing all the files related to parts 1 and 2 of the 'Writing Your Own Toy OS' tutorial and the final disk image with the 2 secret messages. Happy hunting!