R900

There is no coding sheet for this. There is a faded printout which appears to read as follows:

C94 P 1-15
R900
NLOOP   (I think this is a comment)
v99=S
L 8.0

Definition of R901 follows in the listing.

I had assumed this to be the main loop as it occupies a fair amount of space in the chapter, see here, but it may be that this is just to reserve space that gets written in to.