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ISA DCB

ADVANCED DIGITAL INFORMATION CORPORATION

ISA DCB

Data bus: 16-bit, ISA

Size: Three-quarter length, full-height card

Hard drives supported: Up to seven SCSI devices

Floppy drives supported: Two 360KB, 720KB, 1.2 MB or 1.44 MB drives

CONNECTIONS

Function

Location

4-pin connector-drive active LED

CN1

34-pin data cable connector - floppy drives

CN2

50-pin SCSI connector - internal

CN3

50-pin SCSI connector - external

CN4

SCSI ADDRESS

SCSI ID

SW1/Switch 1

SW1/Switch 2

SW1/Switch 3

7

on

on

on

 

0

off

off

off

 

1

on

off

off

 

2

off

on

off

 

3

on

on

off

 

4

off

off

on

 

5

on

off

on

 

6

off

on

on

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy drive port address 3F0-3F7h

JP14

open

 

Floppy drive port address 370-377h

JP14

closed

Floppy drive disabled

JP15 & JP16

open

 

Floppy drive enabled

JP15 & JP16

closed

I/O channel ready disabled

JP17/pins 1 & 2

closed

I/O channel ready enabled

JP17/pins 2 & 3

closed

SCSI Parity check enabled (BT-542 only)

SW1/switch 4

on

 

SCSI Parity check disabled (BT-542 only)

SW1/switch 4

off

SCSI Auto Sense function enabled

SW1/switch 5

on

 

SCSI Auto Sense function disabled

SW1/switch 5

off

Synchronous transfer initiation from controller disabled

SW1/switch 6

on

 

Synchronous transfer intitiation from controller enabled

SW1/switch 6

off

DMA CHANNEL

DMA

SW1/Switch 7

SW1/Switch 8

5

on

on

 

6

off

on

 

7

on

off

 

Disabled

off

off

I/O PORT ADDRESS

Address

SW2/Switch 1

SW2/Switch 2

SW2/Switch 3

330h-333h

on

on

on

 

134h-137h

on

off

off

 

234h-237h

off

on

off

 

334h-337h

on

on

off

 

130h-133h

on

off

on

 

230h-233h

off

on

on

 

Reserved

off

off

on

 

Reserved

off

off

off

BIOS ADDRESS BT-542B

Address

SW2/Switch 4

SW2/Switch 5

DC000h

on

on

 

D8000h

off

on

 

C8000h

off

off

 

Disabled

on

off

BUS TRANSFER RATE BT-542B

Rate

Jumper JP11

Jumper JP13

5.0MB/sec

open

open

5.7MB/sec

open

closed

6.7MB/sec

closed

open

8.0MB/sec

closed

closed

Note: It is recommended that you leave JP11 and JP13 open at all times.

INTERRUPT REQUEST CONFIGURATION

IRQ

SW2/Switch 6

SW2/Switch 7

SW2/Switch 8

JP3

IRQ11

on

on

on

open

 

IRQ9

on

off

on

open

 

IRQ10

off

on

on

open

 

IRQ12

off

off

on

open

 

IRQ14

on

on

off

open

 

IRQ15

off

on

off

closed

 

Reserved

off

off

off

N/A

 

Reserved

on

off

off

N/A

INTERRUPT REQUEST CONFIGURATION (CONTINUED)

IRQ

JP4

JP5

JP6

JP7

JP8

IRQ11

open

open

closed

open

open

IRQ9

open

open

open

open

closed

 

IRQ10

open

open

open

closed

open

 

IRQ12

open

closed

open

open

open

 

IRQ14

closed

open

open

open

open

 

IRQ15

open

open

open

open

open

 

Reserved

N/A

N/A

N/A

N/A

N/A

 

Reserved

N/A

N/A

N/A

N/A

N/A

MISCELLANEOUS TECHNICAL NOTE

The ISA DCB can operate alone or paired with another ISA DCB. If you are using a pair of ISA DCBs, please use the following defaults for the second card: SCSI ID: 7, SCSI Parity Check: Disabled, Auto-sense: Enabled, SCSI sych negotiation: Enabled, DMA Channel: 6, I/O Address: 334h, Host BIOS: Disabled, Interrupt: IRQ12.