SOYO COMPUTER CO., LTD.

SY-24A

   

Processor

80386DX/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

CONTAQ

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 217mm

I/O Options

None

NPU Options

80387/3167

   

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

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

2OMB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U28)

Dirty Bit (U44)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 16K x 4

Note:Dirty bit need only be filled if writeback mode is selected in the CMOS-advanced chipset setup.

CACHE JUMPER CONFIGURATION

Size

JP30

JP31

JP32

JP33

JP34

JP35

64KB

Open

Open

Open

Open

Open

2 & 3

256KB

Closed

Closed

Closed

Closed

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP36

JP37

JP38

JP39

JP40

JP41

JP42

JP43

JP44

80386DX

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

80486SX

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

80486DX

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

80486DX2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

OSC2

JP8

JP13

JP14

25/50iMHz

25MHz

pins 1 & 2 closed

Open

Closed

25/50iMHz

50MHz

pins 2 & 3 closed

Open

Closed

33/66iMHz

33.33MHz

pins 1 & 2 closed

Closed

Open

33/66iMHz

66.667MHz

pins 2 & 3 closed

Closed

Open

40MHz

40MHz

pins 1 & 2 closed

Open

Open

40MHz

80MHz

pins 2 & 3 closed

Open

Open

50MHz

50MHz

pins 1 & 2 closed

Closed

Closed