... Did you discover this during an attempt to implement these routines for yourself?

I try to learn FPGAs and implemented part of a 6502 core/instruction set. Then I used these routines to test my implementation.
When I found the error, I first calculated what floating point number the sequence ...

There is an error in the reprint of the floating point routines from Roy Rankin and Steve Wozniak:

1DD1 80 5A 02 7A R22 DCM 1.4142136 SQRT(2)

should read:

1DD1 80 5A 82 7A R22 DCM 1.4142136 SQRT(2)