dump

A bootable real mode program that prints initial register contents.

For what it's worth, also doubles as an example of how a simple bootable program might be achieved.

Example output

Requirements

• nasm, to assemble nasm-flavored 16-bit x86 assembly
• QEMU, if you want to test boot in a virtual machine
• Rufus, if you want to boot from a real PC

How to build

Assemble the code with nasm:

nasm -f bin src/dump.asm build/dump.bin

or run build.bat

How to use

Method 1: Do a test boot with QEMU

qemu-system-i386 -drive file=build/dump.bin,format=raw -monitor stdio

or run test.bat

Method 2:

1. Create a bootable USB or similar with Rufus

   

2. Reboot machine from said USB