...because we can't all be on the bleeding edge...





MDE486

MYLEX CORPORATION

MDE486

Processor

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

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

Mylex

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot, floppy interface, IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

32-bit external memory card

CN1

Reset switch

P2

Serial port 1

CN2

Speaker

P3

Serial port 2

CN3

Power LED & keylock

P4

Parallel port

CN4

Turbo LED

P5

IDE interface

CN5

IDE interface LED

P6

Floppy drive interface

CN6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J11

Open

Factory configured - do not alter

J12

Open

Factory configured - do not alter

J20

pins 2 & 3 closed

Factory configured - do not alter

J21

pins 1 & 2 closed

Monitor type select color

P1

Closed

 

Monitor type select monochrome

P1

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(4) 256K x 36

NONE

NONE

NONE

8MB

(4) 256K x 36

(4) 256K x 36

NONE

NONE

12MB

(4) 256K x 36

(4) 256K x 36

(4) 256K x 36

NONE

16MB

(4) 256K x 36

(4) 256K x 36

(4) 256K x 36

(4) 256K x 36

16MB

(4) 1M x 36

NONE

NONE

NONE

20MB

(4) 1M x 36

(4) 256K x 36

NONE

NONE

24MB

(4) 1M x 36

(4) 256K x 36

(4) 256K x 36

NONE

28MB

(4) 1M x 36

(4) 256K x 36

(4) 256K x 36

(4) 256K x 36

32MB

(4) 1M x 36

(4) 1M x 36

NONE

NONE

36MB

(4) 1M x 36

(4) 1M x 36

(4) 256K x 36

NONE

40MB

(4) 1M x 36

(4) 1M x 36

(4) 256K x 36

(4) 256K x 36

48MB

(4) 1M x 36

(4) 1M x 36

(4) 1M x 36

NONE

52MB

(4) 1M x 36

(4) 1M x 36

(4) 1M x 36

(4) 256K x 36

64MB

(4) 1M x 36

(4) 1M x 36

(4) 1M x 36

(4) 1M x 36

64MB

(4) 4M x 36

NONE

NONE

NONE

128MB

(4) 4M x 36

(4) 4M x 36

NONE

NONE

192MB

(4) 4M x 36

(4) 4M x 36

(4) 4M x 36

NONE

256MB

(4) 4M x 36

(4) 4M x 36

(4) 4M x 36

(4) 4M x 36

Note:Banks 2 and 3 are used when a 32-bit external memory card is installed at CN1.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U19)

TAG (U20)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

NONE

CACHE JUMPER CONFIGURATION

Size

J1

J2

J3

J4

J5

J6

J8

64KB

Open

Open

Open

Open

Open

Open

2 & 3

128KB

Open

Open

Closed

Open

Closed

Open

1 & 2

256KB

Open

Closed

Closed

Closed

Closed

Open

2 & 3

512KB

Closed

Closed

Closed

Closed

Closed

Closed

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

J9

J10

80486SX

Open

pins 1 & 2, 3 & 4 closed

ODP486SX

pins 1 & 2 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX2

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

CPU SPEED CONFIGURATION

Speed

J7

J13

J14

J15

J16

J17

J18

J19

20MHz

Closed

Open

Open

Closed

Open

Open

1 & 2

1 & 2

25MHz

Open

Closed

Closed

Open

Open

Open

1 & 2

2 & 3

33MHz

Open

Open

Closed

Open

Closed

Open

1 & 2

2 & 3

50iMHz

Open

Closed

Closed

Open

Open

Open

1 & 2

2 & 3

50MHz

Open

Open

Open

Open

Closed

Closed

2 & 3

2 & 3

66iMHz

Open

Open

Closed

Open

Closed

Open

1 & 2

2 & 3

Note: Pins designated should be in the closed position.