Update Ubuntu version and clean up build instructions

Updated Ubuntu version in the documentation and removed outdated build instructions for QEMU.

Author: IanSeyler

doc/Debugging.md

@@ -6,35 +6,21 @@ This document deals with debugging in [GDB](https://www.gnu.org/software/gdb/).
 
 This document expects the reader to understand some basic fundamentals about x86-64 assembly instructions and hexadecimal notation.
 
-This document was written while using an Ubuntu 18.04 virtual machine within VirtualBox.
-
-
-## Building a binary for QEMU to boot
-
-The instructions below require the multiboot.bin and pure64.sys binaries from [Pure64](https://github.com/ReturnInfinity/Pure64).
-
-A couple steps need to be completed prior to compiling Pure64!
-
-1. Adjust the Pure64 `multiboot.asm` file to not use graphics. QEMU does not support multiboot graphics mode.
-
-	Change the line ``FLAG_VIDEO		equ 1<<2   ; set video mode`` to `FLAG_VIDEO		equ 0<<2   ; clear video mode`
-
-2. Adjust Pure64 to just start the kernel instead of a stage 3 loader.
-
-	`$ sed -i 's/call STAGE3/jmp 0x100000/g' pure64.asm`
-
-Use the following to build boot.bin:
-
-	cat multiboot.sys pure64.sys kernel.sys > boot.bin
+This document was written while using an Ubuntu 25.04 virtual machine within VirtualBox.
 
+This document is based on using BareMetal-OS and its script.
 
 ## Debugging with GDB
 
 ### Terminal 1
 
 Set a 'jmp $' somewhere in the source code.
 
-	qemu-system-x86_64 -smp 2 -m 256 -serial file:serial.log -curses -kernel ./boot.bin -s
+Edit `baremetal.sh` and remove the comment for `-s` to enable GDB debugging
+
+Start BareMetal-OS
+
+	./baremetal.sh bnr
 
 
 ### Terminal 2