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MB4861DX/SX

MULTIBEST INDUSTRIAL & MANUFACTURING, INC.

MB4861DX/SX

Processor

80486SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J11

Turbo LED

JP11

Power LED & keylock

J20

Reset switch

SW1

Speaker

J21

Turbo switch

SW2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Open

 

Monitor type select monochrome

JP2

Closed

Bus speed select ATCLK/4

JP6

Open

 

Bus speed select ATCLK/6

JP6

Closed

CPU clock select iOSC/2

JP7

Closed

 

CPU clock select iOSC/1

JP7

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

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) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(1) 8K x 8

256KB

(8) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP12

64KB

Open

Open

Open

Open

256KB

Open

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP3

JP4

JP5

80486SX

Open

Open

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

Closed

pins 1 & 2 closed