adaptec | AHA-1740A/1742A/1744 |
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Preparation
The configuration options for the AHA-1740A/1742A/1744 can be selected from software. Therefore, jumpers do not need to be checked before installing the AHA-1740A/1742A/1744 into the EISA system.
One exception is the AHA-1742A, since it contains an on-board floppy controller. The on-board floppy controller is shipped with a jumper installed at J6, position 6, floppy enabled. If the floppy controller on the AHA-1742A is not used, this jumper should be removed. Only one floppy controller per EISA system can be enabled.
The AHA-1740A/1742A/1744 has a jumper that can be changed. This is the jumper block labeled J4, near the external connector. This determines whether or not the AHA-1740A/1742A/1744 will provide termination power to the SCSI bus. By default, the jumper is installed and termination power is provided by the host adapter. In general, the host adapter should always supply termi- nator power. However, no more than five SCSI devices should be configured to supply terminator power to a single SCSI bus.
