A project to resurrect Unix on the PDP-7 from a scan of original assembly code

I wonder why "scanning" is required here; it seems to me like the effort to set up and OCR this is greater than the effort of typing it in manually. Its certainly not going to be worse (to an order of magnitude) than toggling the boot loader of that era system anyway.

For quite some time I've been toying with the idea of building CPLD/FPGA recreations of pioneering computers like the Alto, the Lilith, the Symbolics series, the Tektronix storage CRT machines and the PDP-[1~8]. I know people have done it with MSXs and Apple II's, C-64's and even the Cray I, but it would be lovely to be able to gift someone with a simple to use (I understand operating a PDP-x is NOT simple) recreation of this cherished machines.

Of course, when appropriate, an as faithful as practical recreation of the original keyboards (or front panels) should be made available.

Surely this can't be arbitrarily re-licensed as GPL, or were these documents re-licensed at some point?

The scans I looked at are almost illegible. The op codes can be deciphered because there are only a limited number of legal combinations. The variable names are another story.

I wonder how many 'security' holes and exploits are in this original version of Unix.

This repository is like the Jurassic Park. Hope they add enough safeguards to prevent the PDP-7 invasion or something!