A graphics program executable on a graphics card is automatically tested. The current sources are respectively coupled to an internal impedance device and an external impedance device. The first conveyor is disposed at an angle of about 45 degrees to a ground surface supporting the cutting apparatus. A one’s complement of a checksum determined from byte values of the information is then placed into the checksum cheater subfield. The address translation mechanism maps a virtual address to a corresponding physical address, and uses different criteria depending on whether the address is local or global.