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AHA-2840VL, AHA-2842VL

ADAPTEC, INC.

AHA-2840VL, AHA-2842VL

Data bus:

32-bit VL-Bus

Size:

Full-lengh, full-height card

Hard drive supported:

Up to seven SCSI devices

Floppy drives supported:

Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

4-pin connector - drive active LED

J1

34-pin floppy drive connector

J2

50-pin SCSI connector - internal

J3

50-pin SCSI connector - external

J4

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy drive enabled

S1/switch 5

off

 

Floppy drive disabled

S1/switch 5

on

Host adapter BIOS enabled

S1/switch 8

off

 

Host adapter BIOS disabled

S1/switch 8

on

Note: Disabling the host adapter BIOS for non-disk devices such as CD-ROM drives, tape drives, will reduce boot up time.

I/O ADDRESS SELECTION

Address

S1/Switch 1

S1/Switch 2

S1/Switch 3

S1/Switch 4

1C000h

off

off

off

off

 

2C000h

on

off

off

off

 

3C000h

off

on

off

off

 

4C000h

on

on

off

off

 

5C000h

off

off

on

off

 

6C000h

on

off

on

off

 

7C000h

off

on

on

off

 

8C000h

on

on

on

off

 

9C000h

off

off

off

on

 

AC000h

on

off

off

on

 

BC000h

off

on

off

on

 

CC000h

on

on

off

on

 

DC000h

off

off

on

on

 

EC000h

on

off

on

on

 

Reserved

off

on

on

on

 

Reserved

on

on

on

on

BASE ADDRESS SELECTION

Address

S1/Switch 6

S1/Switch 7

D8000h

off

off

C8000h

on

off

D0000h

off

on

E0000h

on

on

MISCELLANEOUS TECHNICAL NOTES

Only single-ended SCSI devices can be connected to the AHA-2840VL/2842VL.