...because we can't all be on the bleeding edge...





SY-020H

SOYO COMPUTER CO., LTD.

SY-020H

 

 

Processor

80486SX/80487SX/80486DX

Processor Speed

16/20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

245mm x 220mm

I/O Options

None

NPU Options

4167

 

 

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

External battery

J20

Speaker

J18

Turbo switch

J21

Reset switch

J19

Turbo LED

J22

Note:The oscillator at OSC1 must match the external speed of the CPU installed.

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

Power good signal detect from board

JP7

pins 1 & 2 closed

 

Power good signal detect from power supply

JP7

pins 2 & 3 closed

Keyboard BIOS clock source select programmable timer

JP18

pins 1 & 2 closed

 

Keyboard BIOS clock source select 7MHz

JP18

pins 2 & 3 closed

CPU speed select ³ to 25MHz

JP19

pins 1 & 2 closed

 

CPU speed select < 25MHz

JP19

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

(2) 4K x 4

64KB

(4) 8K x 8

(4) 8K x 8

(2) 4K x 4

128KB

(4) 32K x 8

NONE

(2) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(2) 16K x 4

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP11

JP12

JP13

JP14

JP15

JP16

32KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

128KB

2 & 3

2 & 3

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

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 CONFIGURATION

Type

JP24

JP25

JP26

80486SX

pins 2 & 3 closed

Open

Open

80487SX

pins 1 & 2 closed

Closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

Closed

pins 1 & 2 closed