Operating System Study Notes (1)-start the software drive

Soft drive startup

0x55 startup flag, up to 512 bytes.

Compile the code, copy yourself to the memory, and jump to the specified address to run the initialization program. The system starts in real address mode.

During initialization, the system uses the initialization process to set the memory, reset the interrupt, jump to the protection mode, load the kernel, and finally jump to the start function of the kernel.

Some parameters are passed through the compilation command.

 

 

Copy the content and setup. bin, kernel. bin to the specified location, and then jump to the specific location for execution, setup. bin is the compiled code, initializes the system, and finally jumps to the main function address of the kernel for execution. The file system settings can also be set here.