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DTC2278E (400518-89A)

DATA TECHNOLOGY CORPORATION

DTC2278E (400518-89A)

Data Bus

32-bit VESA Local Bus

Card Size

Three-quarter length, half-height card

Hard Drives supported

Four IDE (AT) or EIDE drives

Floppy drives supported

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

CONNECTIONS

Function

Location

Function

Location

10-pin serial port 2 - internal

J2

40-pin secondary IDE(AT) connector

J6

9-pin serial port 1 - external

J3

40-pin primary IDE(AT) connector

J7

16-pin game port

J4

4-pin connector - drive active LED

J8

34-pin cable connector - floppy drive

J5

25-pin parallel port - external

J9

USER CONFIGURABLE SETTINGS

Function

Label

Position

Game port enabled

W14

Closed

 

Game port disabled

W14

Open

SERIAL PORT 1 ADDRESS SELECTION

COM

W5

W6

COM1 (3F8h)

Pins 1 & 2 closed

Pins 2 & 3 closed

 

COM3 (3E8h)

Pins 2 & 3 closed

Pins 1 & 2 closed

 

Disabled

Pins 1 & 2 closed

Pins 1 & 2 closed

 

Notes: COM1 & COM3 are automatically configured to IRQ4. COM2 & COM4 are automatically configured

to IRQ3.

SERIAL PORT 2 ADDRESS SELECTION

COM

W3

W4

COM2 (2F8h)

Pins 1 & 2 closed

Pins 2 & 3 closed

 

COM4 (2E8h)

Pins 2 & 3 closed

Pins 1 & 2 closed

 

Disabled

Pins 1 & 2 closed

Pins 1 & 2 closed

 

Notes: COM1 & COM3 are automatically configured to IRQ4. COM2 & COM4 are automatically

configured to IRQ3.

PARALLEL PORT ADDRESS SELECTION

LPT

W1

W2

LPT1 (378h)

Pins 2 & 3 closed

Pins 1 & 2 closed

 

LPT2 (278h)

Pins 1 & 2 closed

Pins 2 & 3 closed

 

LPT3 (3BCh)

Pins 2 & 3 closed

Pins 2 & 3 closed

 

Disabled

Pins 1 & 2 closed

Pins 1 & 2 closed

PARALLEL PORT MODE CONFIGURATION

Mode

W7

W22

 

ECP

Pins 2 & 3 closed

Pins 1 & 2 closed

 

EPP

Pins 1 & 2 closed

Pins 2 & 3 closed

Printer

Pins 2 & 3 closed

Pins 2 & 3 closed

Note: You must select a DMA channel when using ECP mode.

DMA CONFIGURATION

Mode

W8

W9

W10

W11

 

1

Closed

Open

Closed

Open

3

Open

Closed

Open

Closed

SERIAL PORT 1 INTERRUPT SELECTION

IRQ

W19

W20

W21

 

IRQ3

Open

Closed

Open

IRQ4

Open

Open

Closed

 

IRQ5

Closed

Open

Open

SERIAL PORT 2 INTERRUPT SELECTION

IRQ

W16

W17

W18

IRQ3

Open

Open

Closed

 

IRQ4

Open

Closed

Open

 

IRQ5

Closed

Open

Open

PARALLEL PORT INTERRUPT

IRQ

W12

W13

IRQ7

Open

Closed

 

IRQ5

Closed

Open

MISCELLANEOUS TECHNICAL NOTES

The floppy controller in automatically configured. When a cable is attached, it is enabled; when no cable is attached it is disabled.