MODULAR CIRCUIT TECHNOLOGY

MCT-M3486-33/40

Processor

80386SX/80486SX/80487SX/80486DX/80486DX2

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J6

Turbo switch

J10

External battery

J7

Turbo LED

J11

Power LED & keylock

J8

Reset switch

J12

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

J3

pins 2 & 3 closed

 

Monitor type select monochrome

J3

pins 1 & 2 closed

»

NPU disabled

JP2

Open

 

NPU enabled

JP2

Closed

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

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W2

W3

W4

W5

W6

W7

W8

W9

64KB

Open

Open

Open

Open

1 & 2

Open

1 & 2

1 & 2

128KB

Open

Open

Closed

Closed

2 & 3

1 & 2

2 & 3

1 & 2

256KB

Closed

Closed

Closed

Closed

1 & 2

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP1

W12

W13

80386SX

pins 1 & 2 closed

Open

Open

80487SX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

Open

80486DX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

80486DX2

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed