RAM or ROM

Hello everyone! I’ve finally logged a normal amount of time again! Let’s dive right in!

MBC Say One!

I managed to bang out my first supported MBC (memory bank controller), a lot of it done while walking on the treadmill this morning. I had already implemented the ROM bank switching by this morning, so next I had to implement switching RAM banks, which has some pretty funky indexing.

Grace Hopper

Naturally, what does one do when they have a hopefully working MBC system, you try a rom!. I only found out tetris doesn’t use an mbc after removing my basic mbc substitute stuff that enabled me to run simple roms.
Speaking of Tetris, the screenshots are me attempting to run tetris iwth different themes (the themes work, tetris doesn’t which we’ll get to).
The themes in order

• Wisteria
• GBGRreen
• Jungle
• Developer
  (Don’t worry, there’s more themes, and you can always submit an issue or PR with a new theme)

Let’s get back to BUGSSSS!! When I tried to run tetris, it wasn’t accepting input and the arrow showing which options are selected was unpresent. These issues are the next things to resolve.

1. I found that there was a critical error in the read methods on my button data stuct
   Here is the commit with the changes in case you are curious.

2. I found out that there is a spot in memory you can write to to load a sprite from some address into OAM. This is the next thing I will be implementing before I try finding the next issue with input so I can at least see some pretty sprites.

Anyway, see y’all tomorrow after I hopefully get tetris working!