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SY-020P1/P2

SOYO COMPUTER CO., LTD.

SY-020P1/P2

   

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

245mm x 220mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

External battery

J20

Speaker

J18

Turbo switch

J21

Reset switch

J19

Turbo LED

J22

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

JP3

Open

 

Monitor type select color

JP3

Closed

CMOS memory normal operation

JP5

pins 1 & 2 closed

 

CMOS memory clear

JP5

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

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

JP21

JP22

JP23

JP24

JP25

JP26

JP27

64KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

128KB

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU CONFIGURATION

Type

OSC1

JP9

JP11

JP12

JP13

80486SX-20MHz

40MHz

2 & 3

Open

2 & 3

2 & 3

80486SX-25MHz

25MHz

1 & 2

Open

2 & 3

2 & 3

80487SX-20MHz

40MHz

2 & 3

Closed

2 & 3

1 & 2

80486DX-25MHz

25MHz

1 & 2

Closed

1 & 2

1 & 2

80486DX-33MHz

33MHz

1 & 2

Closed

1 & 2

1 & 2

80486DX-50MHz

50MHz

1 & 2

Closed

1 & 2

1 & 2

80486DX2-50MHz

25MHz

1 & 2

Closed

1 & 2

1 & 2

80486DX2-66MHz

33MHz

1 & 2

Closed

1 & 2

1 & 2

Note: Pins designated should be in the closed position.