diff --git a/README.md b/README.md
index 2af8b99..89d11f9 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,8 @@ _These images may be outdated, Idk_
 - If you run kernel.bin from shell, it will clear the memory map so when you load anything it will override the kernel code
 - fillCircle() in graphics.h is broken. No idea why, so no filled circles for you (i commented out the boundaryFill call in the function)
 - convertColor() doesn't work right, because i should be using floating point, but -mgeneral-regs-only doesn't let me :(
+- Keyboard handler is kinda bad :/
+- Not really an issue, bit QEMU's PIT is really slow and inacurate
 
 ## [Old Version](https://github.com/Tom-on64/old-kern)
 
diff --git a/docs/fileStructure.txt b/docs/fileStructure.txt
new file mode 100644
index 0000000..8871f7a
--- /dev/null
+++ b/docs/fileStructure.txt
@@ -0,0 +1,12 @@
+=== Project Structure ===
+
+Root contains the Makefile that is used to build kern and some documents.
+It also contains these directories:
+    src/ - The source code of kern
+    include/ - C header files that can be included by the OS. include/c/ can be used by any programs, but other headers shall only be included in the kernel
+    build/ - This directory is created by the Makefile and contains intermediary built obj file and binaries
+    other/ - Things that are not nescessarly part of the OS
+    docs/ - Some basic documentation. Mostly for me so that i don't forget stuff
+
+After running the Makefile and succesfully building the OS a 'kern.iso' file will be created in the root directory
+
diff --git a/include/c/time.h b/include/c/time.h
index d7a9d7b..8d8fa83 100644
--- a/include/c/time.h
+++ b/include/c/time.h
@@ -4,6 +4,7 @@
 #include <stdint.h>
 
 void sleep(uint32_t ms) {
+    // Call syscall 0 (eax) with 'ms' miliseconds (ebx)
     __asm__ volatile ("int $0x80" : : "a"(0), "b"(ms));
 }