In previous posts I went into the process of building a Boot loader in assembler on the MBR (Master Boot Record). If you open a binary editor to inspect the contents of the Boot loader created in the previous post you will realize that the assembled code occupies around 203 bytes. Due to the distribution of the MBR , there are around 440 bytes available for the code. So this simple code used to print basic drive information takes around 50% of the total available. In modern OS (ie Linux) the MBR is used to launch the Boot loader (Linux) from a specific location in the Disk (where there should be more than enough space). Linux, in particular, uses the MBR to launch it's Boot loader (GRUB) The following code will launch our boot loader from the MBR. First, our launcher must load the Bootloader from the media (aka Disk Drive) to a specific location in memory. Then we call a "jmp" to transfer the flow of execution to the loaded application. BITS 16 ...