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DC420

PROMISE TECHNOLOGY, INC.

DC420

Data bus:

32-bit, VL-bus

Size:

Three/quarter-length, full-height card

Hard drive supported:

Two IDE (AT) interface drives

Floppy drives supported:

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

CONNECTIONS

Function

Location

25-pin parallel port - external

CN1

9-pin serial port 1 - external

CN2

10-pin serial port 2 - internal

CN3

34-pin control cable connector - floppy drive

J1

40-pin IDE (AT) Interface connector

J3

4-pin connector - drive active LED

JP3

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Main board supports VL-bus ID3 (speed < 50MHz)

JP1

pins 1 & 2 closed

 

Main board does not support VL-bus ID3 (speed > 50MHz)

JP1

pins 2 & 3 closed

Factory configured - do not alter

JP2

pins 1 & 2 closed

Floppy drive enabled

JP4/G

pins 1 & 2 closed

 

Floppy drive disabled

JP4/G

pins 2 & 3 closed

SERIAL PORT 1 (CN2) CONFIGURATION

COM/Address/IRQ

JP4/A

JP4/B

COM1/3F8h/IRQ4

pins 1 & 2 closed

pins 2 & 3 closed

 

COM3/3E8h/IRQ4

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

SERIAL PORT 2 (CN3) CONFIGURATION

COM/Address/IRQ

JP4/C

JP4/D

COM2/2F8h/IRQ3

pins 1 & 2 closed

pins 2 & 3 closed

 

COM4/2E8h/IRQ3

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

PARALLEL PORT (CN1) CONFIGURATION

Address/IRQ

JP4/E

JP4/F

JP4/H

378h/IRQ7

pin 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

 

3BCh/IRQ7

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

 

278h/IRQ5

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

all pins open

PARALLEL PORT BI-DIRECTIONAL FUNCTION

Setting

JP5

Bi-directional

open

Uni-directional

closed

MEMORY CONFIGURATION

Size

Bank 0

Bank 1

512KB

(1) 512K x 8

None

 

1MB

(1) 512K x 8

(4) 256K x 4