The skip register - page 2

For example:

   X => skip
     A => B
     C => D
     etc => etc
   0 => skip
   E => F

If X outputs a 0, no skip occurs and all the following instructions are executed normally. But if X outputs any non-zero datum, all following instructions are skipped, until it reaches the final "0 => skip" which is always executed, and which then terminates the skip in progress. E => F is unaffected by all this and is always executed.

This is the equivalent of:

   if (X == 0) { A => B; C => D; etc => etc; }
   E => F;