Run 0 (on x86) is a term used to refer to the process of executing the first instruction in a program on an x86 architecture. In x86 assembly language, the first instruction is typically located at memory address 0, hence the term “Run 0”.

To execute a program on x86 architecture, you would typically use an assembler to convert the assembly code into machine code, which consists of a series of binary instructions. The machine code can then be loaded into memory and executed by the processor.

Here is an example of a simple “Hello, World!” program in x86 assembly language:

```assembly section .data hello db ‘Hello, World!’, 0

section .text global _start

_start: ; write system call mov eax, 4 mov ebx, 1 mov ecx, hello mov edx, 13 int 0x80

; exit system call
mov eax, 1
xor ebx, ebx
int 0x80 ```

In this program, the _start label marks the entry point of the program. The first instruction after _start is the write system call, which writes the string “Hello, World!” to the standard output. The second instruction is the exit system call, which terminates the program.

To run this program on an x86 architecture, you would need to assemble and link it using a tool like NASM (Netwide Assembler) and then execute the resulting binary file. The exact steps may vary depending on your operating system and development environment.