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MVI486 & MVI486LC

MYLEX CORPORATION

MVI486 & MVI486LC

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

MYLEX

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), floppy drive interface,

IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

32-bit VESA Local bus slot

J90

IDE interface LED

JP7

32-bit VESA Local bus slot

J91

External battery

JP31

Reset switch

JP2

Floppy drive interface

P1

Speaker

JP3

IDE port

P2

Power LED & keylock

JP4

Serial port 2

P3

Turbo LED

JP5

Serial port 1

P4

Turbo switch

JP6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP1

Open

 

Monitor type select color

JP1

Closed

CMOS memory clear

JP30

pins 1 & 2 closed

 

CMOS memory normal operation (External battery)

JP30

Open

 

CMOS memory normal operation (Internal battery)

JP30

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(1) 256K x 36

NONE

4MB

(1) 1M x 36

NONE

5MB

(1) 1M x 36

(1) 256K x 36

6MB

(1) 1M x 36

(1) 512K x 36

8MB

(1) 1M x 36

(1) 1M x 36

10MB

(1) 2M x 36

(1) 512K x 36

12MB

(1) 2M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

18MB

(1) 4M x 36

(1) 512K x 36

20MB

(1) 4M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

40MB

(1) 4M x 36

(1) 2M x 36

48MB

(1) 8M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U15

TAG/U16

TAG/U17

64KB

(4) 8K x 8

(4) 8K x 8

NONE

(1) 8K x 8

(1) 64K x 8

128KB

(4) 32K x 8

NONE

NONE

(1) 8K x 8

(1) 64K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

(1) 64K x 8

CACHE JUMPER CONFIGURATION

Size

JP14

JP15

JP16

JP17

JP18

JP19

64KB

pins 2 & 3

pins 2 & 3

Open

Open

Open

Open

128KB

pins 1 & 2

pins 1 & 2

Closed

Closed

Open

Open

256KB

pins 2 & 3

pins 2 & 3

Closed

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP25

JP26

JP27

80486SX

Open

pins 2 & 3 closed

Open

80487SX

pins 2 & 3 closed

pins 1 & 2 closed

Closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP8

JP9

JP10

20MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

25MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

PARALLEL PORT OUTPUT SELECTION

Setting

JP28

JP29

Uni-directional (printer)

Closed

Closed

 

Bi-directional

Open

Open