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BT-542S, BT-542D

BUSLOGIC, INC.

BT-542S, BT-542D

Data bus: 16-bit, ISA

Size: Full-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

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy drive port address 3F0-3F7h

JP14

open

 

Floppy drive port address 370-377h

JP14

closed

Floppy drive enabled

JP15 & JP16

closed

 

Floppy drive disabled

JP15 & JP16

open

SCSI Parity check enabled

SW1/switch 4

on

 

SCSI Parity check disabled

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 isabled

SW1/switch 6

on

 

Synchronous transfer intitiation from controller enabled

SW1/switch 6

off

SCSI ADDRESS

SCSI I.D.

SW1/switch 1

SW1/switch 2

SW1/switch 3

 

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

7

on

on

on

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

 

230h-233h

off

on

on

 

130h-133h

on

off

on

 

Reserved

off

off

off

 

Reserved

off

off

on

IRQ SELECT

IRQ

JP3 - JP8

SW2/switch 6

SW2/switch 7

SW2/switch 8

IRQ11

JP6 closed

on

on

on

 

Reserved

N/A

off

off

off

 

Reserved

N/A

on

off

off

 

IRQ9

JP8 closed

on

off

on

 

IRQ10

JP7 closed

off

on

on

 

IRQ12

JP5 closed

off

off

on

 

IRQ14

JP4 closed

on

on

off

 

IRQ15

JP3 closed

off

on

off

. . . continued from previous page

BUSLOGIC, INC.

BT-542S, BT-542D

. . . continued from previous page

BIOS BASE ADDRESS

Address

SW3/switch 3

SW3/switch 4

SW3/switch 5

Disabled

off

off

off

Reserved

on

off

off

C8000h

off

on

off

CC000h

on

on

off

D0000h

off

off

on

D4000h

on

off

on

D8000h

off

on

on

DC000h

on

on

on

DMA CHANNEL

DRQ

SW1/switch 7

SW1/switch 8

5

on

on

 

6

off

on

 

7

on

off

 

Disabled

off

off

BUS TRANSFER RATE

Rate

SW3/switch 1

SW3/switch 2

5.0 MB/second

on

on

 

5.7 MB/second

off

on

 

6.7 MB/second

on

off

 

8.0 MB/second

off

off