Retro Game Internals: Punch-Out Passwords
tomorrowcorporation.com
tomorrowcorporation.com
I was intrigued as to how one would even figure out the sequence of operations used to encode progress into a 'phone number'; a quick search turned up an in-depth report (http://www.dougbabcock.com/mtpo-passwords.txt) which doesn't appear to be credited in Allan's article. It looks like Doug used a password archive to figure out the steps as an exercise in cracking, which itself sounds jolly fun.
It's not obvious to me, could you explain?
I think this might be Japanese NTT phone numbers/prefixes, see http://en.wikipedia.org/wiki/Telephone_numbers_in_Japan
106 Operator assisted collect call service
113 NTT technical faults hotline
0120 NTT Freedial, toll free services