Adaptec AHA-2840A, Installation Manual, Page: 3 / 14

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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
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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
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VL-Bus Slots
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