- completely moved MCU interrupt handling outside of the critical section
- refactored a bit of the PXI code and command names
- merge the I2C read and write cmds to be one
- remove SET_VMODE cmd, now it's always initialized to BGR565 on boot and to RGB565 on firmlaunch
- atomic-ize more stuff
- properly performs gpu/backlight reset
- nukes vram so the initrd had to be moved to arm9 memory, and have its size (at least temporarily) limited to 256k
Except for cia building or loading cia just yet.
Added more checks on ticket content index, mainly due to having effects
in the ticket format itself, and are unknown still.
Ability to determine ticket size.
Verify signature with ticket's proper size.
Changes to use the new Ticket struct with the flexible array member.
When identifying a selected `00000001.sav`, cmac type testing is first attempted for 3DS saves with the **DISA** format. If a 3DS save data is not detected, the search continues at expected offsets for gba vc bottom slots in increasingly larger save sizes. For the GBA VC saves, this only calculates and corrects whichever of the two slots is newer or has the higher counter. There are five additional **CMAC_AGBSAVE_** types to differentiate the different gba save sizes. If a bottom slot was found but determined to be older based on comparing the counter values, the search defaults to **CMAC_AGBSAVE_SD**.
For the save counters, there are two scenarios where the value `00` is considered bigger than `FF` depending which slot has what value. If clarification is required, I will post a diagram at [issue #494](https://github.com/d0k3/GodMode9/issues/494) explaining what is meant by `00` bigger than `FF`.
Please make corrections and improvements to the coding as you see fit in your review. I am not well versed or efficient in the C/C++ programming language.
