Abstract: A computer system (200) includes a baseboard (202) having a first side (201) and a second side (203), where the first side and the second side define a first key opening (205) and a second key opening (207). A mezzanine card interface (208) is coupled to the baseboard. A keying mechanism (219) is coupled to interface with the baseboard through the first key opening, where coupling the keying mechanism to the baseboard initiates a first key signal (225), and where the first key signal operates a logic circuit (229) to permit a first operating voltage (218) to power the mezzanine card interface. Alternatively, the keying mechanism can be coupled to interface with the baseboard through the second key opening, where coupling the keying mechanism to the baseboard initiates a second key signal (227), and where the second key signal operates the logic circuit to permit a second operating voltage (220) to power the mezzanine card interface.

Abstract: A VME multi-service platform system (100) includes a payload module (106) coupled to operate within a VME multi-service platform system chassis (202) having a VMEbus network (102) and a switched fabric network (104) that operate concurrently and includes the payload module having a first switched fabric connector (210) in a P0 mechanical envelope (218) and a payload module keying mechanism (222) in the P0 mechanical envelope of the payload module that uniquely corresponds to a first switched fabric network standard.

Abstract: A computer system (200) includes a baseboard (202) having a first side (201) and a second side (203), where the first side and the second side define a first key opening (205) and a second key opening (207). A mezzanine card interface (208) is coupled to the baseboard. A keying mechanism (219) is coupled to interface with the baseboard through the first key opening, where coupling the keying mechanism to the baseboard initiates a first key signal (225), and where the first key signal operates a logic circuit (229) to permit a first operating voltage (218) to power the mezzanine card interface. Alternatively, the keying mechanism can be coupled to interface with the baseboard through the second key opening, where coupling the keying mechanism to the baseboard initiates a second key signal (227), and where the second key signal operates the logic circuit to permit a second operating voltage (220) to power the mezzanine card interface.