The EBSA-285 contains processor, system controller, memory, input/output devices, and a passive backplane (EBSA-BPL). There are a number of header blocks on the card that accept two-pin jumpers. This allows the card to be configured in one of two distinct ways so that all of the major features of the 21285 can be used. The mounting bracket of the EBSA-285 holds a female nine-way D-type connector, three LED indicators, and a rotary switch. The D-type connector provides an RS-232-C terminal connection to the host system. The LEDs provide status information. The rotary switch is used by onboard software to allow a particular image stored on the board to be executed automatically at power-up.
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