The source code is copyright of their respective owners (not me) They are not in an online git

├── darkdust - https://darkdust.net/writings/megadrive/ (C) Marc Haisenko
├── nameless - http://namelessalgorithm.com/genesis/ (C) Nameless Algorithm
├── pascalorama_neozeed - http://www.pascalorama.com/megadrive-m68000-programming/ 
└── pascalorama_pong - (C) Pascal Bosquet 

[https://blog.bigevilcorporation.co.uk/2012/02/28/sega-megadrive-1-getting-started/] - Excellent staring point

[https://github.com/BigEvilCorporation/megadrive_samples] - Git repo for the above examples

[http://web.textfiles.com/games/sega1409.txt] - Sega Programming FAQ from back in the day

[https://megacatstudios.com/blogs/press/sega-genesis-mega-drive-vdp-graphics-guide-v1-2a-03-14-17] - Fantastic overview of the Megadrive VDP - excellent blog too

[https://www.schmid.dk/blog/] - Useful beginner tutorial

[https://www.plutiedev.com/] - Nice reference and blog

[https://wiki.megadrive.org/index.php?title=Main_Page] - Some useful stuff

[https://sourceware.org/binutils/docs-2.32/as/index.html] - GNU Assembler Guide

https://github.com/db-electronics/68kTutorials - Develops Big Evil Corps stuff a bit futher

[https://huguesjohnson.com/programming/] - Another really good blog following the devlopement of his game

gas - GNU Assembler

asmx

vasm - Personally I don't like the license