I received the following license grant via private email, which supercedes the LICENSE file text distributed with d8tape in 2002:
On Fri, Nov 10, 2017 at 6:38 PM, Rob Krten <rob@krten.com> wrote:
As far as d8tape goes:
I, Robert Krten, hereby provide a royalty free, perpetual, worldwide
license to use the source code and information provided in my PDP-8
disassembler, called "d8tape" for any purpose whatsoever.