Installation Guide AVA-2825 VL-to-Fast SCSI and VL-to-IDE Host Adapter with SCSISelect R AA AAAA AA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAA AA AA AA AVA-2825 Installation Guide AA AA AA AA AA AA Part Number: 510612-00, Rev A AA AA AA AA AA AA Print Spec Number: 492733-00 AA AA AA AA AA AA Current Date: 6/8/94 ECN Date: 6/14/94 AA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA
1 Getting Started This Installation Guide explains how to install and configure the AVA™-2825 host adapter. The AVA-2825 combines support for both IDE and Fast SCSI on one VL-Bus™ host adapter. This allows you to benefit from the flexibility of Fast SCSI and the fast data transfer rate of advanced IDE hard disk drives, while using only one VL-Bus slot in your PC. You can connect one or two IDE drives to the AVA-2825. You can also connect up to seven SCSI devices and two floppy disk drives.
Default Settings The AVA-2825 default settings are as follows: Parameter Host Adapter Interrupt Channel Host Adapter SCSI ID SCSI Parity Checking Host Adapter Termination Host Adapter BIOS Address Enable Sync Negotiation Enable FAST SCSI Enable Disconnection System Boot (INT 19h) Controlled by Host Adapter BIOS Extended BIOS Translation for Drives >1 GByte BIOS Support for Floptical Drives SCSI I/O Port Address IDE Data Transfer Speed Floppy Drive Controller 1 Default Setting IRQ 11 7 Enabled Enabled DC0
Installing the Host Adapter Changing Switches and Jumpers This table shows all the possible settings of the AVA-2825 switch block (s1). Default settings are marked with an asterisk (*). Floppy Drive Controller sw1 Enabled* On Disabled Off IDE sw2 Enabled* Off Disabled On BIOS Address sw3 sw4 DC000h* On On C8000h Off Off CC000h Off On D8000h On Off If you need to change switch settings or the setting of jumper J7, do it now before you install the host adapter.
Changing the SCSI I/O Port Address The AVA-2825 SCSI I/O port address is set by jumper block J7. The default port address is 340h-35Fh. You can change the SCSI I/O port address to its alternate setting of 140h-15Fh if it conflicts with another option board in your PC. For example, if you install two AVA-2825 host adapters in your PC, you must change one host adapter’s SCSI I/O port to the alternate address.
3 Remove the corresponding expansion slot cover from the PC chassis. 4 Align the bus connector on the bottom of the host adapter with the VL-Bus slot and carefully press it down into the slot. Secure the host adapter bracket to the PC chassis with the screw from the removed expansion slot cover. Note: Do not replace the chassis cover or reconnect the power yet! 5 Connecting SCSI Peripheral Devices Caution: AVA-2825 host adapters support only single-ended SCSI devices.
Terminating SCSI Devices The last peripheral device at each end of the SCSI bus must have a set of resistors called terminators installed or enabled. Terminators must be removed from, or disabled on, other devices in the middle of the SCSI bus. The AVA-2825 and most SCSI peripherals have built-in terminators that can be enabled or disabled. Terminating the Host Adapter Termination is enabled by default on AVA-2825 host adapters.
Setting SCSI IDs Be sure that each device on the AVA-2825 SCSI bus has a different SCSI ID. See your SCSI peripheral documentation to learn how to determine the SCSI ID and change it. ■ The default SCSI ID for the AVA-2825 host adapter is SCSI ID 7. You can change the ID with the SCSISelect utility, if necessary. (See Configuring the Host Adapter on page 8.) ■ We recommend that you assign SCSI IDs 0 and 1 to the first two SCSI hard disk drives in your PC.
Keep these points in mind when installing IDE drives: ■ Your PC can recognize two physical IDE disk drives when they are connected to the AVA-2825. ■ The first IDE drive must be set up as the master drive (drive C) in CMOS setup, and the second IDE drive (if any) as the slave drive. ■ If your PC has both IDE drives and SCSI drives, it always boots from the IDE drive designated as drive C. ■ IDE drives larger than 528 MBytes may require a disk partitioning utility for use under DOS.
To run SCSISelect, press Ctrl-A when you boot your PC and the SCSISelect message appears. Use the arrow (↑↓) and Enter keys to make selections. Press Esc at any time to return to the previous menu. Press F6 to restore the original default settings. To abandon changes made in the Configure/View Host Adapter Settings menu, press Esc and select No when asked if you want to save the changes.
■ Remove and insert magneto-optical and other kinds of removable media while your PC is running ■ Connect devices other than disk drives, such as SCSI tape drives, CD-ROM drives, and scanners.
■ For technical assistance, call Adaptec’s Technical Support Hot Line at 800-959-SCSI (7274), or 408-945-2550. M–Th: 6:00 a.m.– 5:00 p.m., F: 6:00 a.m.–3:00 p.m., Pacific Time. ■ To order Adaptec software and SCSI cables, call 800-442-SCSI (7274), M–F: 6:00 a.m. to 5:00 p.m., Pacific Time. If you are calling from outside the U.S. and Canada, the number is 408-957-SCSI (7274). ■ To request additional documentation for Adaptec products, call 800-934-2766, M–F: 5:00 a.m. to 6:00 p.m., Pacific Time.
