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AHA-1540

ADAPTEC, INC.

AHA-1540

Data bus:

16-bit ISA

Size:

Full-length, full-height card

Hard drive supported:

Up to seven SCSI drives

Floppy drives supported:

None

CONNECTIONS

Function

Location

50-pin SCSI connector - internal

CN1

2-pin connector - drive active LED

LED

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Synchronous negotiation disabled

J1/A

open

 

Synchronous negotiation enabled

J1/A

closed

»

Factory configured - do not alter

J1/B

open

»

Parity enabled

J1/C

open

 

Parity disabled

J1/C

closed

»

Wait state disabled

J4

N/A

 

Wait state enabled

J4

N/A

SCSI ADDRESS CONFIGURATION

Address

J1/D

J1/E

J1/F

»

7

open

open

open

 

0

closed

closed

closed

 

1

open

closed

closed

 

2

closed

open

closed

 

3

open

open

closed

 

4

closed

closed

open

 

5

open

closed

open

 

6

closed

open

open

DMA CHANNEL SELECTION

Channel

J1/G

J1/H

J6/A

J6/B

J6/C

»

5

open

closed

open

closed

open

 

0

closed

closed

closed

open

open

 

6

closed

open

open

open

closed

 

7

open

open

open

open

open

DMA CHANNEL SELECTION (CON’T)

Channel

J6/D

J7/A

J7/B

J7/C

J7/D

»

5

open

open

closed

open

open

 

0

open

closed

open

open

open

 

6

open

open

open

closed

open

 

7

closed

open

open

open

closed

AT INTERRUPT SELECTION

IRQ

J1/I

J1/J

J1/K

J8/A

J8/B

»

11

open

closed

open

open

open

 

9

open

open

open

closed

open

 

10

closed

open

open

open

closed

 

12

closed

closed

open

open

open

 

14

open

open

closed

open

open

 

15

closed

open

closed

open

open

 

Not defined

open

closed

closed

N/A

N/A

 

Not defined

closed

closed

closed

N/A

N/A

AT INTERRUPT SELECTION (CON’T)

IRQ

J8/C

J8/D

J8/E

J8/F

»

11

closed

open

open

open

 

9

open

open

open

open

 

10

open

open

open

open

 

12

open

closed

open

open

 

14

open

open

closed

open

 

15

open

open

open

closed

PORT ADDRESS SELECTION

Address

J9/A

J9/B

J9/C

J9/D

J9/E

J9/F

J9/G

J9/H

»

330h

open

open

closed

closed

open

open

closed

closed

 

004h

closed

open

open

open

open

open

open

open

 

008h

open

closed

open

open

open

open

open

open

 

010h

open

open

closed

open

open

open

open

open

 

020h

open

open

open

closed

open

open

open

open

 

040h

open

open

open

open

closed

open

open

open

 

080h

open

open

open

open

open

closed

open

open

 

100h

open

open

open

open

open

open

closed

open

 

200h

open

open

open

open

open

open

open

closed

AT BIOS ADDRESS SELECTION

Address

J10/A

J10/B

J10/C

»

DC000h

open

open

open

 

C8000h

closed

open

closed

 

D8000h

open

open

closed

 

CC000h

closed

open

open