1. A computer system, comprising: a memory module storing a main base input/output system (BIOS) comprising an auxiliary function; a connection port connecting to an auxiliary module comprising at least one specific program; and a central processing unit (CPU) executing the main BIOS when the auxiliary function is de-activated and executing the specific program when the auxiliary function is activated, wherein the auxiliary module comprises a second slot for inserting a second memory chip storing a second application program, when executing the second application program, the CPU detects the computer system.