LuigiBlood
commented
1 year ago So since then I decided to provide more improvements to 64DD here's a gist of the changes:
- Added more 64DD drive commands as most of them are known, some with just verbose output because it's not really relevant.
- On reset, make sure to stop every single drive interaction because else it's probably going to cause problems.
- Added busy state management. Shouldn't change much but it's still more accurate to how the 64DD actually works.
- Implemented Write protection based on Disk Type command info.
richard42
This adds two new interrupt handlers for the two different kinds of interrupts the 64DD can issue (MECHA and BM), then introduces delays based on clock speed (and CountPerOp, kinda to make sure), to every command, but especially the Seek command, and then changes the nature of BM interrupts to work with delays instead of working as fast as possible based on DMAs and other hacky reads.
The timing used is very approximate and is trying to be close to real hardware, but is not quite there, a lot more finetuning will be done eventually, but libleo is very tolerant.
This fixes Gnat Attack in Mario Artist Paint Studio prototype, as the game tries to read the next stage data before unloading the current stage, but since the 64DD responds way too quick it replaces the data before it actually unloads it and crashes.