Installation guide

AHA-2840A/2842A Installation Guide

Part Number: 510590-00, Rev B

Print Spec Number: 492663-00

Current Date: 5/9/96 ECN Date: 6/3/96

Default Settings

AHA-2840A/2842A host adapters operate correctly

with their factory default settings in the majority of PC

systems featuring VL-Bus slots. The default settings are:

See Section , Configuring the Host Adapter to learn

how to change these settings.

Installing the Host Adapter

Inserting the Board

WARNING: Turn OFF and disconnect the

power to your computer and attached

devices before you remove the chassis cover.

See your computer’s documentation for

instructions on how to do this.

1 Remove the chassis cover to expose the expansion

slots and external access covers.

2 Locate an unused VESA

local bus (VL-Bus)

expansion slot, as shown in the diagram below.

Parameter Default Setting

Interrupt Level IRQ 11

Data FIFO Threshold 100%

Port Address 1C00h

Host Adapter BIOS Enabled at address D8000h

Host Adapter SCSI ID 7

SCSI Bus Parity Enabled

SCSI Bus Reset at Host Adapter Initialization Enabled

SCSI Bus Termination Enabled

Floppy Drive Controller Enabled (AHA-2842A only)

Greater than 1 GByte Support Disabled

BIOS Support for More than 2 Drives Disabled

Removable Drive Support

Support removable drive as boot

device only

VL-Bus Slots