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AHA-1520, AHA-1522

ADAPTEC, INC.

AHA-1520, AHA-1522

Data

bus:

16-bit, ISA

Size:

Half-length, full-height card

Hard drives supported:

Up to seven SCSI devices

Floppy drives supported:

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

CONNECTIONS

Function

Location

34-pin data cable connector-floppy drive

CN1

50-pin SCSI cable connector-internal

CN2

50-pin SCSI cable connector-external

CN3

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Data transfer in DMA disabled

J5/jumper 1

open

 

Data transfer in DMA enabled

J5/jumper 1

closed

Boot enabled (Intercept INT19 call)

J5/jumper 2

closed

 

Boot disabled (INT19 normal)

J5/jumper 2

open

Synchronous negotiation enabled

J5/jumper 5

closed

 

Synchronous negotiation disabled

J5/jumper 5

open

Disconnect by target / INT15 enabled

J5/jumper 6

closed

 

Disconnect by target / INT15 disabled

J5/jumper 6

open

Factory configured - do not alter

J5/jumpers 7 & 8

open

USER CONFIGURABLE SETTINGS

Function

Location

Setting

SCSI parity check enabled

J6/jumper 8

open

 

SCSI parity check disabled

J6/jumper 8

closed

Floppy drive enabled

J7/jumper 1

closed

 

Floppy drive disabled

J7/jumper 1

open

Floppy drive Interrupt is IRQ6

J7/jumper 6

closed

 

Floppy drive Interrupt is IRQ10

J7/jumper 7

closed

Floppy drive-dual speed disabled

J7/jumper 8

open

 

Floppy drive-dual speed enabled

J7/jumper 8

closed

I/O port address 340h

J9/jumper 5

open

 

I/O port address 140h

J9/jumper 5

closed

SCSI ADDRESS

SCSI ID

J6/jumper 1

J6/jumper 2

J6/jumper 3

 

0

open

open

open

 

1

closed

open

open

 

2

open

closed

open

 

3

closed

closed

open

 

4

open

open

closed

 

5

closed

open

closed

 

6

open

closed

closed

7

closed

closed

closed

DMA CHANNEL

DMA

J6/6

J6/7

J8/1 & 5

J8/2 & 6

J8/3 & 7

J8/4 & 8

 

7

closed

closed

closed

open

open

open

 

6

open

closed

open

closed

open

open

 

5

closed

open

open

open

closed

open

0

open

open

open

open

open

closed

INTERRUPT REQUEST

IRQ

J6/4

J6/5

J9/1

J9/2

J9/3

J9/4

 

IRQ9

open

open

open

open

open

closed

 

IRQ10

closed

open

open

open

closed

open

IRQ11

open

closed

open

closed

open

open

 

IRQ12

closed

closed

closed

open

open

open

BIOS ADDRESS

Address

J9/jumper 6

J9/jumper 7

J9/jumper 8

DC000h

closed

closed

closed

 

C8000h

open

open

closed

 

CC000h

open

closed

closed

 

D8000h

closed

open

closed

 

Disabled

N/A

N/A

open

FLOPPY DRIVE DMA - J7

 

DRQ

DACK

 

DMA

Jumper 2

Jumper 3

Jumper 4

Jumper 5

DMA Channel 2

closed

open

closed

open

 

DMA Channel 3

open

closed

open

closed

MESSAGE SELECT

MSG #0 - ADAPTEC HEADERMSG #1 - JUMPER CONFIG. INFO. MSG #2 - SCSI DEVICE INFO.

MSG #3 - BOOT PROGRESS INFO.MSG #4 - ERROR MESSAGES

Message

JP5/jumper 3

JP5/jumper 4

Msg #0 and #4

open

open

 

Msg #0, #3 and #4

open

closed

 

All messages displayed

closed

open

 

Msg #4 only

closed

closed