Andrew Jacobs passed away on January 8, 2021.
This is a copy of Andrew's website, downloaded on February 2, 2021 before it went down. It
was hosted at www.obelisk.me.uk and before that www.obelisk.demon.co.uk.
Minimal changes have been made to allow it to be hosted on 6502.org: http://6502.org/users/obelisk/
See also Andrew's GitHub repositories.