On occasion, when going through my whaling log, I've had to re-think emulation, and whenever I've learned useful tricks which pertain to more than one game, I've shared my notes, either in the body of the post about whatever game I was playing (typically my first on a system), or in a dedicated post.
This is an index of these posts.
Aspect ratio in Atari VCS games:
Introduction to TRS-80 emulation:
Of minis, micros, and Z-machines:
Apple II emulation by MAME:
Unusual MAME controls:
Dunjonquest: Temple of Apshai on the TRS-80: