Installation Guide AHA-1540CP/1542CP ISA-to-SCSI Plug and Play High-Performance Bus Master Host Adapter with SCSISelect Utility R
1 Introduction This Installation Guide explains how to install and configure Adaptec AHATM-1540CP/1542CP Plug and Play ISA-to-SCSI high-performance bus master host adapters. AHA-1540CP/1542CP host adapters are fully Plug and Play compliant. The AHA-1540CP/1542CP supports the SCSI Configured Automatically (SCAM) protocol, which assigns SCSI IDs dynamically and resolves SCSI ID conflicts automatically.
Host Adapter Layout This diagram shows the major AHA-1540CP/ 1542CP components. The following table describes each component: J1 J2 J3 J4 S1 Label J1 J2 J3 Description External LED Connector Floppy Drive Connector1 Internal SCSI Connector 1 AHA-1542CP Label Description J4 External SCSI Connector S1 Switch Block only.
2 Installing the Host Adapter Follow these steps to insert the host adapter in a slot: WARNING: Turn OFF and disconnect the power to your PC and attached devices. See your PC’s documentation for instructions. 1 Remove the PC chassis cover to expose the expansion slots and expansion slot covers. 2 Identify an empty ISA expansion slot. 3 Remove the corresponding expansion slot cover from the rear opening on the PC chassis. 4 Change host adapter switch settings, if necessary.
Attach the host adapter bracket to the PC chassis with the expansion slot cover screw. Note: Do not replace the PC chassis cover or reconnect the power yet. 3 Connecting SCSI Devices This section explains how to connect SCSI disk drives, CD-ROM drives, and other kinds of SCSI devices to your AHA-1540CP/1542CP host adapter. Caution: AHA-1540CP/1542CP host adapters support only single-ended SCSI devices. Do not connect differential SCSI devices to the host adapter.
3 Plug the last connector on the ribbon cable into the connector of the closest internal SCSI device. Maintain pin-1 orientation. 4 Plug the middle connector on the SCSI cable into the connector of the second internal SCSI device, if there is one. Maintain pin-1 orientation. Connecting External SCSI Devices 1 Attach the connector of a 50-pin, high-density external SCSI cable to the host adapter’s external SCSI connector, J4.
SCAM cannot change or read the SCSI IDs of some older SCSI devices. If you have any such devices and SCAM is enabled on the host adapter, your PC may hang if SCAM tries to assign SCSI IDs that are already in use. If this is the case, you must disable SCAM functions with the SCSISelect™ utility (see Configuring the SCSI Bus on page 8) and set SCSI IDs manually for all devices. See your SCSI device documentation to determine how, or if, your SCSI devices support SCAM.
5 Reassembling and Starting the PC Follow these steps to reassemble and power the PC: 1 Check SCSI cable connections. They may have been loosened if you had to change switch settings on the SCSI device(s). 2 Replace the PC chassis cover, following the instructions in your PC’s documentation. 3 Be sure all power switches are OFF, then reconnect the power cables to your PC. 4 Turn ON the power for the external SCSI devices, and then turn ON the PC.
If you have multiple AHA-1540CP/1542CP host adapters in your computer, use the SCSI Disk Utilities to determine which host adapter you are configuring. Configure/View Host Adapter Settings The Configuration screen displays these options: Host Adapter Interrupt (IRQ) Channel, Host Adapter DMA Channel, Host Adapter SCSI ID, SCSI Parity Checking, DMA Transfer Rate, and Host Adapter SCSI Termination. Highlight an option and press Enter to select the value.
SCSISelect. You can stop the test at any time by pressing Esc. Your PC will reboot. 7 Operating System Software Support Windows 95 Windows 95 has embedded software support for your AHA-1540CP/1542CP host adapter. To install your host adapter under Windows 95, read the Microsoft documentation for installing new hardware devices. Adaptec EZ-SCSI™ has a number of 32-bit applications that enhance the usefulness of your SCSI devices under Windows 95.
8 Troubleshooting Checklist If a problem occurs during installation, check these items first: ■ Are the power cables and SCSI interface cables properly connected? Connect internal devices to your computer’s power supply; plug external device power cables into a grounded line power outlet. Follow the instructions in the hardware documentation.
10 Adaptec Customer Support Services If you have questions about installing or using the host adapter, check this install guide first—you will find answers to most of your questions here. If you need further assistance, please contact us.
FCC Compliance Statement NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
