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486-S

MICROMEDIA TECHNOLOGIES, INC.

486-S

Processor

80486SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

230mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

CN1

Turbo LED

CN4

Speaker

CN2

Reset switch

CN5

Turbo switch

CN3

External battery

CN6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP10

pins 1 & 2 closed

 

CMOS memory clear

JP10

pins 2 & 3 closed

Monitor type select color

JP13

Closed

 

Monitor type select monochrome

JP13

Open

Power good signal detect from board

JP17

pins 1 & 2 closed

 

Power good signal detect from power supply

JP17

pins 2 & 3 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

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

32KB

(4) 8K x 8

NONE

(1) 8K x 8

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

JP9

32KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

64KB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

128KB

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP14

JP15

JP16

80486SX

Open

pins 2 & 3 closed

pins 2 & 3 closed

80487SX

Closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed