> [!todo] Testing
> - [ ] setup custom test frameworks (Use CrystalOS-V2 as a reference)
> 	- [ ] write a sub-crate for tests
> 	- [ ] implement several unit tests on things that we are likely to break often
> - [ ] setup Git CI/CD pipeline with testing
> 	- [ ] figure out how to run QEMU in the test environment
> 	- [ ] write a script to run tests
> 	- [ ] a release should only be published if all tests pass

> [!todo] Memory
> - [ ] make sure page tables are correct. we're still getting the annoying page fault errors for the APIC
> - [ ] page allocator
>   - [ ] e

> [!todo] Allocator
> - [x] learn about several allocator designs and decide on the optimal one
> - [x] implementation
> 	- [x] implement an allocate method
> 	- [x] implement a deallocate method
> 	- [x] set the global allocator
> - [ ] testing
> 	- [ ] write unit tests
> 		- [ ] many allocations
> 		- [ ] large allocations
> 		- [ ] allocating more memory than is available
> 	- [ ] pass unit tests

> [!todo] Threading
> - [ ] implement thread switching functionality
> 	- [ ] switch stacks
> - [ ] implement multi-threading
> 	- [ ] figure out how to turn on another core
> - [ ] Scheduler
> 	- [ ] which task goes on which thread?
> 		- [ ] round robin / time slicing algorithm
> 	- [ ] switch tasks on a given core
> 		- [ ] push registers
> 		- [ ] switch stacks
> 		- [ ] ensure the scheduler knows where to find the stack for each thread
> 	- [ ] move a given task to a new core
> 	- [ ] differentiate between kernel threads and user threads
> - [ ] create syscall to create a new thread

> [!todo] Filesystem 
> - [ ] AHCI Implementation
> 	- [ ] figure out what hard drives are attached
> 	- [ ] read data
> 	- [ ] write data
> - [ ] FAT32 Implementation
> 	- [ ] parse FAT header
> 	- [ ] figure out where files are / what files are what
> 	- [ ] parse file metadata / figure out type of file
> 	- [ ] reading the entirety of a file into memory
> - [ ] *(extension)* ext2 Implementation
> - [ ] Syscall API
> 	- [ ] provide a user program with file read / write access given a filename
> 		- [ ] translate a filename into a disk location of data & the size of the data
> 		- [ ] provide an interface to read from a file or write to a file

> [!todo] APIC
> - [ ] Enable APIC
> 	- [x] Get apic location  from MSR
> 	- [x] Enable APIC bit flag
> 	- [x] Disable Legacy PIC
> 	- [ ] Map physical APIC address to virtual memory
> 
>> [!error]
>> Page fault exception occurs when APIC is activated
>
>- [ ] Setup Interrupt handlers to handle interrupts generated by the APIC
>	- [ ] Timer Interrupts
>	- [ ] Keyboard Interrupts

> [!todo] Userspace (req: Threading, Filesystem)
> - [ ] Load program into memory from disk
> 	- [ ] requires:
> 		- [ ] Program Loader
> 			- [ ] Parse ELF File
> 			- [ ] Load file into memory
> 		- [ ] Filesystem
> 		- [ ] Scheduler (to start and manage the process)
> - [ ] Start a user process
> 	- [ ] switch stacks
> 	- [ ] jump to user code

>[!todo] User Interface 
>- This will be a library so that  programs in userspace can provide a user interface rather than relying on text commands from a basic terminal
>- features required:
>	- [ ] Rendering frames to a display buffer
>		- [ ] requires: Frame rendering Syscall
>	- [ ] I/O
>		- [ ] syncio
>			- [ ] keystrokes
>		- [ ] asyncio
>			- [ ] keystrokes
>		- [ ] requires: I/O Syscalls
>	- [ ] Window struct
>		- [ ] stores it's size and location
>		- [ ] handles rendering pixels to the screen
>	- [ ] Widgets
>		- [ ] textbox / label
>		- [ ] single line text input
>			- [ ] how do we capture keyboard inputs?
>		- [ ] multiline text input
>			- [ ] how do we capture keyboard inputs?
>		- [ ] button
>		- [ ] dialog
>		- [ ] box widget
>			- [ ] figure out how to nest other widgets inside it
>```rust
>pub struct Window {
>	position;
>	dimensions;
>}
>
>impl Window {
>	fn display(&self, frame: &Frame) -> Result<(), RenderError>;
>}
>
>pub struct Frame<'a> {
>	window: &'a Window,
>	data: <"... a suitable type to store pixels">
>}
>
>impl<'a> Frame<'a> {
>	pub fn display(&self) -> Result<(), RenderError> {
>		self.window.display(self)
>	}
>}
>
> pub trait Widget {
> 	fn render(&self) -> Frame;
> }
>```