Turing Tumble Community

Paul's puzzle 44 solution - 33 parts

Here’s my solution (it’s the one from the book):

And here’s the link:

http://www.lodev.org/jstumble/?board=00llllr0r0eellller0r0eellllerrr0eerilfrlfexfl

Description: Both registers count down in turn. When register A underflows (tries to go below 0), the computer stops.