Building Games According to The Leaked SNES Development Manual

Developing games for Nintendo was an extremely difficult task with many levels of gatekeeping and intimate knowledge of low level systems required. These programmers were on another level

I found a copy of the developer manual on Internet Archive. It is in 2 book with a total page count of 653. A great deal of details are included and they don't look anything like most modern documentation that involve more high level approaches that abstract away many aspects.