Manufacturing Test Mode for a Personal Computer
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
This article describes a method for personal computer (PC) adapter card hardware itself to provide for a host independent functional testing capability in a manufacturing environment. Manufacturing of adapter cards (e.g., PC feature cards) in high volume creates a need for the capability of testing these adapters for hardware functional integrity without having to mount each adapter in a host box. Adapter hardware can contain the circuitry to provide for a manufacturing test mode (MTM) signal. A functionally invalid combination of some of the I/O channel input signals to the adapter can be used to create a MTM signal. Functionally invalid combination means that the activation of these I/O signals are mutually exclusive during the normal operation of the adapter in its system host box.