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MNE486 System Board

MYLEX CORPORATION

MNE486 System Board

Processor

80486DX

Processor Speed

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

Chip Set

Intel

Max. Onboard DRAM

32MB

Cache

128KB

BIOS

Mylex

Dimensions

330mm x 218mm

I/O Options

Bus mouse, floppy drive interface, IDE interface, serial port, parallel port

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

P11

Serial port

P20

Power LED & keylock

P12

Parallel port

P21

Turbo LED

P13

Bus mouse

P22

Reset switch

P14

IDE interface

P23

Floppy drive interface

P18

IDE interface LED

P24

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

External SRAM cache enabled

J1

pins 1 & 2 closed

 

External SRAM cache disabled

J1

Open

Factory configured - do not alter

J2

N/A

Factory configured - do not alter

J13

N/A

Factory configured - do not alter

J14

N/A

Factory configured - do not alter

J15

N/A

Factory configured - do not alter

J16

N/A

Serial port 1 select COM1 interrupt IRQ4 at 3F8-3FF

J17

pins 1 & 2 closed

 

Serial port 1 select COM2 interrupt IRQ3 at 2F8-2FF

J17

pins 2 & 3 closed

Parallel port select LPT1 interrupt IRQ7 at 378-37F

J18

pins 1 & 2 closed

 

Parallel port select LPT2 interrupt IRQ5 at 278-27F

J18

pins 2 & 3 closed

On-board interface ports enabled

J19

pins 1 & 2 closed

 

On-board interface ports disabled

J19

pins 2 & 3 closed

IDE factory diagnostics disabled

J20

pins 1 & 2 closed

 

IDE factory diagnostics enabled

J20

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

DRAM JUMPER CONFIGURATION

Size

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

1MB

Open

Open

Open

Open

Open

2 & 3

Open

1 & 2

1 & 2

1 & 2

2MB

1 & 2

1 & 2

1 & 2

1 & 2

Open

1 & 2

Open

1 & 2

1 & 2

2 & 3

4MB

Open

Open

Open

Open

Open

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

8MB

1 & 2

1 & 2

1 & 2

1 & 2

Open

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

16MB

Open

Open

Open

Open

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

32MB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.