I want to learn machine/assembly language

Many years ago, When I had a Commodore 16 (which had a built in 6502 assembler) I used to hack into games and edit them.
What I’d like to do is try and continue where I left off, but obviously on a modern up-to-date processor.
Where do I begin, what do I need to install to start writing/editing machine assembly language, where can I download any documentation/manuals to help refresh my memory?

Hi Pooky.

This topic popped up during the migration of the old Forum posts to the new platform. It’s very old (2018?) but I reply for two reasons:

  1. Did you ever find a way of programming assembler for modern devices?
  2. What do you think of the new Forum platform? It takes a bit of getting used to but the old one was obsolete and a change was required.