docs: updated spec, added instructions

Updated architecture specification and added instructions to run/compile. Also specified development status.

README.md

@@ -1,15 +1,20 @@
 # IcarOS
 
 - IcarOS is my documented journey while exploring OSDev
-- A simple, minimal and small skeletal 32-bit operating system written in Assembly and C
+- A simple, minimal and small skeletal 64-bit operating system written in Assembly and C
 - Currently working on a Rust port
 
 ### To run, just execute the make file.
   - You will need to install certain dependencies to cross-compile. Installation script for Arch Linux can be found in `src/utils`
   - You can also do `./Makefile`
   - You will need the full QEMU package on linux to run the bootloader
+  - Once you install qemu you can run the Makefile that contains rules to use the crosscompiler.
+  - The provided script for the cross-compiler currently works only for linux, but can also be made for other platforms by installing the requirements given in the script
 
-- As of now, it can boot and jump to the kernel and execute from there
+- As of now, it can boot and jump to the kernel and execute from there for 32 bit, and clears the screen and waits for jump to kernel for 64-bit
+
+---
+-  *ℹ️ The OS is still in it's development phase.*
 
 
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