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VS486F/S-3VL

YOUNG MICRO SYSTEMS, INC.

VS486F/S-3VL

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Symphony

Max. Onboard DRAM

64MB

Cache

64/256/1024KB

BIOS

AMI

Dimensions

230mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo switch

JP24

Power LED & keylock

JP20

32-bit VESA Local bus slot

S1

Speaker

JP21

32-bit VESA Local bus slot

S2

Reset switch

JP22

32-bit VESA Local bus slot

S3

Turbo LED

JP23

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

J2

Unknown

Flash BIOS write protect enabled

JP2

pins 1 & 2 closed

 

Flash BIOS write protect disabled

JP2

pins 2 & 3 closed

Factory configured - do not alter

JP3

Unknown

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) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

CPU SPEED CONFIGURATION

Speed

JA1

JP4

JP5

JP6

JP7

JP10

JP11

25MHz

pins 2 & 3

pins 2 & 3

Open

Closed

Closed

pins 1 & 2

pins 2 & 3

33MHz

pins 2 & 3

pins 2 & 3

Closed

Open

Closed

pins 1 & 2

pins 2 & 3

50I MHz

pins 1 & 2

pins 1 & 2

Open

Closed

Closed

pins 1 & 2

pins 1 & 2

66I MHz

pins 2 & 3

pins 2 & 3

Closed

Open

Closed

pins 1 & 2

pins 2 & 3

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP12

JP13

JP14

JP15

JP16

JP17

JP18

JP30

25MHz

Closed

Open

Closed

Open

Open

Closed

Open

Open

33MHz

Closed

Open

Closed

Open

Open

Closed

Open

Open

50I MHz

Closed

Closed

Open

Open

Closed

Closed

Closed

Open

66I MHz

Closed

Closed

Open

Open

Closed

Closed

Closed

Open

CACHE CONFIGURATION

Size

Max Cachable

Cache

TAG

64KB

8MB

(4) 8K x 8

(1) 8K x 8

128KB

32MB

(4) 32K x 8

(1) 32K x 8

256KB

64MB

(4) 128K x 8

(1) 128K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP19

JP25

JP26

64KB

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

256KB

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 2 & 3

1MB

pins 1 & 2

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3