HwMuseum | Index

DIAMOND FLOWER, INC.

486-25/33UNB AIO, 486DX2-50UNB AIO

Processor

80486SX/80486DX/ODP486SX/80486DX2

Processor Speed

20/25/33/50(internal)MHz

Chip Set

UMC

Max. Onboard DRAM

16MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

Bus mouse port, floppy drive interface, IDE interface, parallel port, serial port (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

IDE interface

CN1

Turbo switch

J3 & J8

Floppy drive interface

CN2

Reset switch

J4 & J9

VGA feature connector

CN3

IDE interface LED

J5

VGA port

CN4

Power LED & keylock

J6

Parallel port

CN5

Speaker

J7

Bus mouse port

CN6

External battery

J10

Serial port 1

CN7

Serial port 2

JP31

Alternate keyboard connector

J1

Riser card

S1

Turbo LED

J2

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Battery select internal

J11

Pins 2 & 3 closed

 

Battery select external

J11

Pins 1 & 2 closed

»

Speaker select internal

JP1

Closed

 

Speaker select external

JP1

Open

»

Onboard VGA local bus enabled

JP2

JP3

Pins 2 & 3 closed

Closed

»

Onboard VGA local bus disabled

JP2

JP3

Pins 1 & 2 closed

Open

»

Factory configured - do not alter

JP4

Closed

»

Factory configured - do not alter

JP5

Pins 1 & 2 and 3 & 4 closed

»

Factory configured - do not alter

JP6

Open

»

Factory configured - do not alter

JP7

Open

»

BIOS type select 27C256 (32KB)

JP8

Pins 2 & 3 closed

 

BIOS type select 27C512 (64KB)

JP8

Pins 1 & 2 closed

»

Factory configured - do not alter

JP10

Open

»

Monitor type select color

JP11

Closed

 

Monitor type select monochrome

JP11

Open

»

VGA port (CN4) interrupt select IRQ2

JP12

Open

 

VGA port (CN4) interrupt select none

JP12

Closed

»

Factory configured - do not alter

JP13

Open

»

Factory configured - do not alter

JP14

Closed

»

Floppy interface enabled

JP20

Pins 1 & 2 closed

 

Floppy interface disabled

JP20

Pins 2 & 3 closed

»

Factory configured - do not alter

JP21

Pins 1 & 2 closed

»

IDE interface enabled

JP22

Pins 1 & 2 closed

 

IDE interface disabled

JP22

Pins 2 & 3 closed

PARALLEL PORT 1 (CN5) CONFIGURATION

LPT

I/O Address

Interrupt

JP9

JP15

JP16

LPT 1

3BC-3BEh

IRQ7

Pins 1 & 2

Pins 2 & 3

Pins 1 & 2

LPT 2

378-37Ah

IRQ7

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

LPT 3

278-27Ah

IRQ5

Pins 2 & 3

Pins 1 & 2

Pins 2 & 3

Disabled

N/A

N/A

N/A

Pins 2 & 3

Pins 2 & 3

Note: Pins designated should be in the closed position.

SERIAL PORTS 1 & 2 CONFIGURATION

Serial Port 1

Serial Port 2

JP17

JP18

JP19

COM1

COM2

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

COM2

COM1

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

COM1

Disabled

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Disabled

COM1

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Disabled

COM2

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

COM2

Disabled

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Disabled

Disabled

Pins 2 & 3 closed

Pins 2 & 3 closed

Open

SERIAL PORT 1 (CN1) FORCED TRUE CONFIGURATION

Mode

JP24

JP25

JP26

Normal operation

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Forced true

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

SERIAL PORT 2 (JP31) FORCED TRUE CONFIGURATION

Mode

JP27

JP28

JP29

Normal operation

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Forced true

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

SERIAL PORT 1 (CN7) DTE/DCE CONFIGURATION

Function

JP30

»

DTE

Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, and 9 & 10 closed

 

DCE

Pins 1 & 3, 2 & 4, 5 & 7, 6 & 8, and 9 & 10 closed

SERIAL PORT 2 (JP31) DTE/DCE CONFIGURATION

Function

JP23

»

DTE

Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8, and 9 & 10 closed

 

DCE

Pins 1 & 3, 2 & 4, 5 & 7, 6 & 8, and 9 & 10 closed

VRAM CONFIGURATION

Size

VRAM

Location

512KB

(4) 44256

Bank 0

1024KB

(8) 44256

Bank 0 & 1

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

NONE

NONE

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

NONE

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

(1) 1M x 36

NONE

NONE

NONE

5MB

(1) 256K x 36

(1) 1M x 36

NONE

NONE

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

9MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

NONE

10MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36