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Hardware Configuration
NOTE: The Base I/O address and IRQ settings are the same for all adapters. Data Clock Direction, DTE, is correct for all connections except V.35.
Other switch or jumper settings unique to an individual adapter type (i.e.,
Base I/O Address
The Base I/O address is selected via switch SW1, which may be labeled CR ADDR (Control Register Address) on some adapters.
The adapter requires four bytes of I/O locations for its control registers. These control registers are used by the server CPU to coordinate and service information provided by the adapter. The address of these registers depends on the setting of switches