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PB400 (4MB)

PACKARD BELL

PB400 (4MB)

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

16/20/25/33/50(internal)/66(internal)MHz

Chip Set

OPTI

Max. onboard DRAM

20MB

SRAM Cache

64/128/256KB

BIOS

Phoenix

Dimensions

330mm x 218mm

I/O Options

Fax/modem daughterboard, floppy drive interface, game port, IDE interface, multi-function connector (IDE interface LED, keylock, reset, SW_MODLR, Turbo LED), parallel port, PS/2 keyboard port, PS/2 mouse port, serial port, VGA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 keyboard

J1

Keylock

J19

PS/2 mouse

J2

Fax/modem daughterboard

J21

VGA port

J3

IDE interface

J25

Game port

J4

Floppy drive interface

J27

Parallel port

J5

External speaker connector

J28

Serial port B

J6

Multi-function connector

J32

External battery

J7

CPU/chassis fan power (+12VDC)

J33

VGA feature connector

J13

Riser card

S1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Internal battery enabled

J8

Closed

 

Internal battery disabled

J8

Open

Onboard Game port enabled

J12

pins 2 & 3 closed

 

Onboard Game port disabled

J12

pins 1 & 2 closed

Monitor type select color

J16

Closed

 

Monitor type select monochrome

J16

Open

PS/2 mouse port enabled

J17

Closed

 

PS/2 mouse port disabled

J17

Open

Onboard IDE interface enabled

J24

pins 1 & 2 closed

 

Onboard IDE interface disabled

J24

pins 2 & 3 closed

Onboard floppy drive interface enabled

J26

pins 1 & 2 closed

 

Onboard floppy drive interface disabled

J26

pins 2 & 3 closed

Onboard speaker enabled

J29

pins 1 & 2 closed

 

Onboard speaker disabled

J29

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Parity 0

Bank 1

Parity 1

Bank 2

4MB

(2) 441000

(1) 411000

(2) 441000

(1) 411000

None

5MB

(2) 441000

(1) 411000

(2) 441000

(1) 411000

(4) 256K x 9

8MB

(2) 441000

(1) 411000

(2) 441000

(1) 411000

(4) 1M x 9

20MB

(2) 441000

(1) 411000

(2) 441000

(1) 411000

(4) 4M x 9

Note:Bank 0 and 1 are soldered to the board. Locations of Parity 0 and 1 are unknown.

VIDEO CONFIGURATION

Mode

J10

J14

VGA port (J3)

pins 1 & 2 closed

Closed

VGA feature connector (J13)

pins 1 & 2 closed

Open

Disabled

pins 2 & 3 closed

N/A

VRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(4) 44256

None

1024KB

(4) 44256

(4) 44256

Note: If Bank 1 sockets are omitted from board, board was factory installed with 1MB of VRAM. Bank 0 is soldered to the board.

SERIAL PORT CONFIGURATION

Modem (J21)

Port B (J5)

ISA Modem

J18

J20

J101/JMOD *

Disabled

COM2

None

N/A

pins 1 & 2

Closed

Disabled

COM2

COM1

pins 2 & 3

pins 1 & 2

Closed

Disabled

COM2

COM3

pins 1 & 2

pins 1 & 2

Closed

COM1

COM2

None

pins 1 & 2

pins 1 & 2

Open

COM3

COM2

None

pins 2 & 3

pins 1 & 2

Open

Disabled

COM4

None

N/A

pins 2 & 3

Closed

Disabled

COM4

COM1

pins 2 & 3

pins 2 & 3

Closed

Disabled

COM4

COM3

pins 1 & 2

pins 2 & 3

Closed

COM1

COM4

None

pins 1 & 2

pins 2 & 3

Open

COM3

COM4

None

pins 2 & 3

pins 2 & 3

Open

Note:* JMOD is a special block placed on J21 itself, connecting pins 10 and 11 together diagonally. Permanent damage to the board will occur if the JMOD jumper is installed improperly.

Boards with J101 do not use the JMOD jumper (J101 is a direct replacement for JMOD).

Pins designated should be in the closed position.

PARALLEL PORT CONFIGURATION

LPT

IRQ

J22

J23

LPT1

IRQ7

pins 1 & 2 closed

pins 1 & 2 closed

 

LPT1

IRQ5

pins 1 & 2 closed

pins 2 & 3 closed

 

LPT2

IRQ7

pins 2 & 3 closed

pins 1 & 2 closed

 

LPT2

IRQ5

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

CPU

J30/1 & 2

J30/3 & 4

J30/5 & 6

J30/7 & 8

J30/9&10

J31

J34

80486SX

Open

Closed

Open

Open

Open

Open

Open

80487SX

Closed

Open

Closed

Open

Closed

Open

Open

80486DX

Closed

Open

Closed

Closed

Open

Open

Open

ODP486SX

Closed

Open

Closed

Closed

Open

Closed

Closed

80486DX2

Closed

Open

Closed

Closed

Open

Open

Closed

CPU SPEED CONFIGURATION

Speed

J35/pins 1 & 2

J35/pins 3 & 4

16MHz

Closed

Closed

20MHz

Open

Closed

25MHz

Closed

Open

33MHz

Open

Open

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U81)

Dirty Bit (U84)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 32K x 8

(1) 64K x 1

128KB

(4) 32K x 8

NONE

(1) 32K x 8

(1) 64K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 64K x 1

CACHE JUMPER CONFIGURATION

Size

J36/1 & 2

J36/3 & 4

J36/5 & 6

J36/7 & 8

J36/9 & 10

Disabled

Open

Open

Open

Open

Open

 

64KB

Open

Open

Open

Open

Open

 

128KB

Closed

Open

Closed

Closed

Open

 

256KB

Closed

Closed

Closed

Open

Closed