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OMNIPLEX 4XX/ME

DELL COMPUTER CORPORATION

OMNIPLEX 4XX/ME

Processor

80486SX/80486DX/80486DX2/80486DX4

Processor Speed

25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

Intel

Video Chip Set

ATI

Maximum Onboard Memory

128MB

Maximum Video Memory

1MB

Cache

256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), feature connector, VGA port, riser slot, cache slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Feature connector

CN1

Thermal monitor board connector

CN9

PS/2 mouse port

CN2

IDE interface LED

J1

Serial port 1

CN3

Chassis fan power

J2

Serial port 2

CN4

Speaker

J3

Parallel port

CN5

External battery

J4

VGA port

CN6

Audio connector

J5

IDE interface

CN7

Riser slot

SL1

Floppy drive interface

CN8

Cache slot

SL2

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

BOOT

Open

Factory configured - do not alter

CRD

Open

EISA configuration normal operation

EISA

Open

 

EISA configuration clear

EISA

Closed

Factory configured - do not alter

JC1

Unidentified

Factory configured - do not alter

JC2

Unidentified

Factory configured - do not alter

JC3

Unidentified

Factory configured - do not alter

JC4

Unidentified

Factory configured - do not alter

JC5

Unidentified

Factory configured - do not alter

JP2

Unidentified

Factory configured - do not alter

JP4

Unidentified

Factory configured - do not alter

JP5

Unidentified

Integrated SCSI host adapter terminated

SCSI

Closed

 

Integrated SCSI host adapter not terminated

SCSI

Open

On board video enabled

SW1/1

On

 

On board video disabled

SW1/1

Off

Password enabled

SW1/2

On

 

Password disabled

SW1/2

Off

I/O controller address select 26Eh - 26Fh

SW1/3

On

 

I/O controller address select 398h - 399h

SW1/3

Off

Flash BIOS update at boot

SW1/4

On

 

flash BIOS not updated at boot

SW1/4

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(2) 512K x 36

None

8MB

(2) 1M x 36

None

8MB

(2) 512K x 36

(2) 512K x 36

12MB

(2) 1M x 36

(2) 512K x 36

16MB

(2) 2M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

20MB

(2) 2M x 36

(2) 512K x 36

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 4M x 36

None

32MB

(2) 2M x 36

(2) 2M x 36

36MB

(2) 4M x 36

(2) 512K x 36

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

68MB

(2) 8M x 36

(2) 512K x 36

72MB

(2) 8M x 36

(2) 1M x 36

80MB

(2) 8M x 36

(2) 2M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

Note: Board also accepts x 32 SIMMs.

CACHE CONFIGURATION

Size

SL1

256KB

256KB module installed

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

512KB

512KB

None

1MB

512KB

(4) 256K x 4

Note: Bank 0 is factory installed and is not configurable.

CPU SPEED SELECTION

Speed

JP1

JP3

25MHz

Closed

Open

33MHz

Open

Closed

50iMHz

Closed

Open

66iMHz

Open

Closed

75iMHz

Closed

Open

100iMHz

Open

Closed