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DTC3250

DATA TECHNOLOGY CORPORATION

DTC3250

Data bus: 8-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Up to seven SCSI devices

Floppy drives supported: Three 360KB or 720KB

CONNECTIONS

Function

Location

50-pin SCSI connector-internal

CN1

50-pin SCSI connector-external

CN2

34-pin data cable connector-floppy drive

CN3

BIOS ADDRESS

Address

SW2/switch 5

SW2/switch 6

D800h

off

off

 

DC00h

on

off

 

C800h

off

on

 

CC00h

on

on

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy port address 3F2-3F7h

JP1

pins 1 & 2 closed

 

Floppy port address 372-377h

JP1

pins 2 & 3 closed

Normal operation

JP2

pins 2 & 3 closed

 

Factory test enabled

JP2

pins 1 & 2 closed

SCSI parity check disabled

SW1/switch 3

on

 

SCSI parity check enabled

SW1/switch 3

off

Dual-speed floppy supported

SW2/switch 7

on

 

Single-speed floppy supported

SW2/switch 7

off

PS/2-type floppy on Drive Select 2 not supported

SW2/switch 8

on

 

PS/2-type floppy drive on Drive Select 2 supported

SW2/switch 8

off

Floppy drive disabled

SW2/switch 9

off

 

Floppy drive enabled

SW2/switch 9

on

Normal operation mode

SW2/switch 10

off

 

Factory test enabled

SW2/switch 10

on

INTERRUPT REQUEST SWITCHES - SW1 AND SW2

 

INTERRUPT "A"

INQUIRY INTERRUPT "B"

 

#

SW1/1

SW1/2

SW2/1

SW2/2

SW2/3

SW2/4

 

4

on

on

off

off

off

on

 

5

off

on

off

off

on

off

 

6

on

off

off

on

off

off

7

off

off

on

off

off

off

SCSI ADDRESS

SCSI ID

SW1/switch 4

SW1/switch 5

SW1/switch 6

 

0

on

on

on

 

1

off

on

on

 

2

on

off

on

 

3

off

off

on

 

4

on

on

off

 

5

off

on

off

 

6

on

off

off

7

off

off

off