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AHA-1520A, AHA1522A

ADAPTEC, INC.

AHA-1520A, AHA1522A

Data bus:

16-bit ISA

Size:

Half-length, full-height card

Hard drive supported:

Up to seven SCSI devices

Floppy drives supported:

None

CONNECTIONS

Function

Location

50-pin SCSI connector - external

CN1

50-pin SCSI connector - internal

CN2

34-pin floppy controller - 1522A only

CN3

SCSI ID SELECTION

SCSI ID

J6/1

J6/2

J6/3

7

closed

closed

closed

 

0

open

open

open

 

1

closed

open

open

 

2

open

closed

open

 

3

closed

closed

open

 

4

open

open

closed

 

5

closed

pen

closed

 

6

open

closed

closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Factory configured - do not alter

J5/1

open

INT 19 is re-routed

J5/2

closed

 

INT 19 is not re-routed

J5/2

open

Sync. negotiation enabled

J5/5

closed

 

Sync. negotiation disabled

J5/5

open

Disconnect by target SCSI device enabled

J5/6

closed

 

Disconnect by target SCSI device disabled

J5/6

open

Factory configured - do not alter

J5/7

open

Factory configured - do not alter

J5/8

open

Factory configured - do not alter

J6/6

open

Factory configured - do not alter

J6/7

open

SCSI parity check enabled

J6/8

open

 

SCSI parity check disabled

J6/8

closed

Floppy drive enabled (only on 1522A)

J7

closed

 

Floppy drive disabled (only on 1522A)

J7

open

Factory configured - do not alter

J8/1-8

open

Adapter I/O address is 340h

J9/5

open

 

Adapter I/O address is 140h

J9/5

closed

Host adapter BIOS enabled

J9/8

closed

 

Host adapter BIOS disabled

J9/8

open

Note: When connecting both external & internal devices to the host adapter - remove terminators

MESSAGES AT BOOT-UP

Message

J5/3

J5/4

Adapter header

open

open

 

Error messages

closed

closed

 

Boot progress report

open

closed

 

SCSI device information

closed

open

BIOS ADDRESS SELECTION

Address

J9/6

J9/7

DFFFFh

closed

closed

 

CBFFFh

open

open

 

CFFFFh

open

closed

 

DBFFFh

closed

open

INTERRUPT SELECTION

IRQ

J6/4

J6/5

J9/1

J9/2

J9/3

J9/4

11

open

closed

open

closed

open

open

 

9

open

open

open

open

open

closed

 

10

closed

open

open

open

closed

open

 

12

closed

closed

closed

open

open

open