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BT-542B

BUSLOGIC, INC.

BT-542B

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

J1

34-pin connector - floppy drive interface

J2

50-pin SCSI connector - internal

J3

50-pin SCSI connector - external

J4

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

SCSI Parity check enabled

SW1/switch 4

on

SCSI Parity check disabled

SW1/switch 4

off

SCSI Auto Sense function enabled (for Rev. <=F)

SW1/switch 5

on

SCSI Auto Sense function disabled (for Rev. <=F)

SW1/switch 5

off

Disk >1G support disabled (for Rev. >=G)

SW1/switch 5

on

Disk >1G support enabled (for Rev. >=G)

SW1/switch 5

off

Synchronous transfer initiation from controller disabled

SW1/switch 6

on

Synchronous transfer intitiation from controller enabled

SW1/switch 6

off

Floppy drive port address 3F0-3F7h

W14

open

Floppy drive port address 370-377h

W14

closed

Floppy drive enabled

W15, W16

closed

Floppy drive disabled

W15, W16

open

I/O channel ready enabled

W17/pins 1 & 2

closed

I/O channel ready disabled

W17/pins 2 & 3

closed

Factory configured - do not alter

W18

N/A

Factory configured - do not alter

W19

N/A

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

 

130h-133h

on

off

on

 

134h-137h

on

off

off

 

230h-233h

off

on

on

 

234h-237h

off

on

off

 

334h-337h

on

on

off

 

Reserved

off

off

on

 

Reserved

off

off

off

BIOS ADDRESS

Address

SW2/Switch 4

SW2/Switch 5

DC000h

on

on

 

D8000h

off

on

 

C8000h

off

off

 

Disabled

on

off

INTERRUPT REQUEST CONFIGURATION

IRQ

SW2/Switch 6

SW2/Switch 7

SW2/Switch 8

W3

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

W4

W5

W6

W7

W8

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

BUS TRANSFER RATE

Rate

W11

W13

5.0MB/sec

open

open

5.7MB/sec

open

closed

6.7MB/sec

closed

open

8.0MB/sec

closed

closed