It provides 1-bit LFSRs with a tap signal, in both the Fibonacci and Galois configurations. These chips carry both the main shift line and the loopback, so they can be plugged end-to-end to make wider shift registers.
There are also 8-bit shift registers built from these components, and a testing framework for them.
I'm afraid it's not very well documented, but discovery is part of the fun.
And if the Predator is looking over your shoulder, there's even a special readout for him!!!
