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BT-445S

BUSLOGIC, INC.

BT-445S

Data bus:

32-bit, VL-bus

Size:

Three/quarter-length, full-height card

Hard drive supported:

Up to seven SCSI devices

Floppy drives supported:

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

CONNECTIONS

Function

Location

4-pin connector-Drive active LED

J1

34-pin control cable connector-floppy drive

J2

50-pin SCSI connector - internal

J3

50-pin SCSI connector - external

J4

SCSI ID

ID

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

USER CONFIGURABLE SETTINGS

Function

Location

Setting

SCSI parity check enabled

SW1/switch 4

on

 

SCSI parity check disabled

SW1/switch 4

off

Hard drive capacity > 1GB disabled

SW1/switch 5

on

 

Hard drive capacity > 1GB enabled

SW1/switch 5

off

SCSI synchronous negotiation disabled

SW1/switch 6

on

 

SCSI synchronous negotiation enabled

SW1/switch 6

off

SCSI 5MB/sec data transfer rate enabled

SW1/switch 7

on

 

SCSI 10MB/sec data transfer rate enabled

SW1/switch 7

off

Floppy drive port address is 3F0-3F7h

W14

open

 

Floppy drive port address is 370-377h

W14

closed

Floppy drive enabled

W15 & W16

closed

 

Floppy drive disabled

W15 & W16

open

VL-BUS CLOCK SPEED CONFIGURATION

Clock Speed

SW1/switch 8

SW1/switch 9

SW1/switch 10

 

20MHz

on

on

off

 

25MHz

off

on

off

33 or 40MHz

on

on

on

 

50MHz

on

off

on

 

50i MHz

off

on

off

 

66i MHz

on

on

on

I/O PORT ADDRESS

Address

SW2/switch 1

SW2/switch 2

SW2/switch 3

 

130-133h

on

off

on

 

134-137h

on

off

off

 

230-233h

off

on

on

 

234-237h

off

on

off

330-333h

on

on

on

 

334-337h

on

on

off

BIOS ADDRESS

Address

SW2/switch 4

SW2/switch 5

DC000h

on

on

 

C8000h

off

off

 

D8000h

off

on

 

Disabled

on

off

HOST INTERRUPT REQUEST

IRQ

SW2/switch 6

SW2/switch 7

SW2/switch 8

 

9

on

off

on

 

10

off

on

on

11

on

on

on

 

12

off

off

on

 

14

on

on

off

 

15

off

on

off

HOST INTERRUPT CHANNEL

Channel

Jumper W3

Jumper W4

Jumper W5

Jumper W6

Jumper W7

Jumper W8

 

9

open

open

open

open

open

closed

 

10

open

open

open

open

closed

open

 

11

open

open

open

closed

open

open

12

open

open

closed

open

open

open

 

14

open

closed

open

open

open

open

 

15

closed

open

open

open

open

open

MISCELLANEOUS TECHNICAL NOTES

SW2/switch 9 and SW2/switch 10 are factory configured - do not alter