DATA TECHNOLOGY CORPORATION

DTC3274VL (900176-89XX)

Data bus:

32-bit VL-Bus

Size:

Three/quarter-length, half-height card

Hard drive supported:

Up to seven SCSI devices

Floppy drives supported:

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

CONNECTIONS

Function

Location

34-pin cable connector - floppy drive

JP5

50-pin SCSI connector - internal

JP7

50-pin SCSI connector - external

JP8

4-pin connector - drive active LED

JP10

SCSI ID SELECTION

SCSI ID

SW11

SW12

SW13

»

7

off

off

off

 

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

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

BIOS support 2 hard drives

JP1

open

 

BIOS support 3 or more hard drives

JP1

closed

»

Factory configured - do not alter

JP2

open

»

BIOS enabled

JP3

closed

 

BIOS disabled

JP3

open

»

Factory configured - do not alter

JP4

open

»

Factory configured - do not alter

JP6/pins 1 & 2

N/A

»

Active termination enabled

JP9

open

 

Active termination disabled

JP9

closed

»

Factory configured - do not alter

JP11/pins 2 & 3

N/A

»

Factory configured - do not alter

JP12

open

»

Factory configured - do not alter

JP13

open

»

Factory configured - do not alter

JP14

open

»

Factory configured - do not alter

JP15

open

»

CPU clock <=33MHz

SW1

off

 

CPU clock >33MHz

SW1

on

»

Factory configured - do not alter

SW8

N/A

»

Synchronous Negotiation disabled

SW14

on

 

Synchronous Negotiation enabled

SW14

off

»

Fast synchronous transfer disabled

SW15

on

 

Fast synchronous transfer enabled

SW15

off

»

Floppy disk controller enabled

SW16

off

 

Floppy disk controller disabled

SW16

on

»

SCSI parity enabled

SW17

off

 

SCSI parity disabled

SW17

on

»

Factory configured - do not alter

SW18

N/A

BASE I/O ADDRESS SELECTION

Address

SW2

SW3

»

330h

off

off

 

130h

on

on

 

230h

on

off

 

334h

off

on

BIOS ADDRESS SELECTION

Address

SW4

SW5

»

C800-CBFFh

off

off

 

CC00-CCFFh

off

on

 

D800-DBFFh

on

off

 

DC00-DFFFh

on

on

INTERRUPT SELECTION

IRQ

SW6

SW7

»

11

on

off

 

10

on

on

 

12

off

on

 

15

off

off

MISCELLANOUS TECHNICAL NOTES

DTC 3274VL can support floptical drives through an ASPI utility.