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SB-SYM-486C

SEANIX TECHNOLOGY, INC.

SB-SYM-486C

Processor

80486SX/80486DX

Processor Speed

16/20/25/33/50MHz

Chip Set

Symphony

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J19

Turbo switch

J21 (pins 3 & 4)

Speaker

J20

Reset switch

J22

Turbo LED

J21 (pins 1 & 2)

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Monitor type select color

W2

pins 1 & 2 closed

 

Monitor type select monochrome

W2

pins 2 & 3 closed

Ľ

Factory configured - do not alter

W3

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

3MB

(4) 1M x 9

NONE

4MB

(4) 1M x 9

(4) 256K x 9

4MB

(4) 1M x 9

(4) 1M x 9

5MB

(4) 4M x 9

NONE

6MB

(4) 4M x 9

(4) 256K x 9

7MB

(4) 4M x 9

(4) 1M x 9

8MB

(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

W4

W5

W6

W7

W8

64KB

2 & 3

Open

1 & 2

1 & 2

2 & 3

128KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Size

W9

W15

W17

W19

W20

64KB

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

128KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Setting

W21

Cache installed (shows size at boot up)

pins 1 & 2 closed

Cache installed (does not show size at boot up)

pins 1 & 2 closed

Cache not installed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

W13

W14

W18

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

W1

W10

W11

W12

W16

16MHz

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

20MHz

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

25MHz

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

33MHz

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

50MHz

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.