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





SY-25M/N/P

SOYO COMPUTER CO., LTD.

SY-25M/N/P

Processor

CX486S/80486SX/80486DX/AM486DX/80486DX2/CX486DX/ 80486DX4/P24D/P24T

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB (EDO supported)

Maximum Video Memory

None

Cache

64/128/256KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

Green PC connector

JP4

Speaker

J18

Green PC connector

JP6

Reset switch

J19

Green PC connector

JP7

External battery

J20

Green PC connector

JP8

Turbo switch

J21

32-bit VESA local bus slots

SL1 – SL3

Turbo LED

J22

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Monitor type select monochrome

JP3

Open

 

Monitor type select color/EGA/VGA

JP3

Closed

»

CMOS memory normal operation

JP5

Pins 1 & 2 closed

 

CMOS memory clear

JP5

Pins 2 & 3 closed

»

Factory configured - do not alter

JP17

Pins 2 & 3 closed

»

Factory configured - do not alter

JP27

Pins 1 & 2 closed

»

Factory configured - do not alter

JP34

Unidentified

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

2MB

(1) 512K x 36

None

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 512K x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 1M x 36

None

None

None

5MB

(1) 256K x 36

(1) 1M x 36

None

None

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

None

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

None

8MB

(1) 256K x 36

(1) 256K x 36

(1) 512K x 36

(1) 1M x 36

8MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

8MB

(1) 2M x 36

None

None

None

10MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 1M x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 4M x 36

None

None

None

17MB

(1) 256K x 36

(1) 4M x 36

None

None

18MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

None

18MB

(1) 512K x 36

(1) 4M x 36

None

None

SIMM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

20MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

None

20MB

(1) 1M x 36

(1) 4M x 36

None

None

24MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

(1) 4M x 36

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 8M x 36

None

None

None

36MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

None

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 4M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

None

64MB

(1) 16M x 36

None

None

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

65MB

(1) 256K x 36

(1) 16M x 36

None

None

68MB

(1) 1M x 36

(1) 16M x 36

None

None

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 1M x 36

(1) 1M x 36

(1) 16M x 36

None

72MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

80MB

(1) 4M x 36

(1) 16M x 36

None

None

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

None

96MB

(1) 4M x 36

(1) 4M x 36

(1) 16M x 36

None

96MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

128MB

(1) 16M x 36

(1) 16M x 36

None

None

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

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 (A)

(4) 32K x 8

(4) 32K x 8

(1) 16K/32K x 8

256KB (B)

(4) 64K x 8

None

(1) 16K/32K x 8

CACHE JUMPER CONFIGURATION

Size

JP9

JP10

JP13

64KB

Pins 2 & 3 closed

Open

Pins 1 & 2 closed

128KB

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

256KB (A)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

256KB (B)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

JP29

JP30

JP31

25MHz

Closed

Open

Closed

33MHz

Open

Closed

Closed

40MHz

Closed

Open

Open

50iMHz

Closed

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Open

Closed

Closed

75iMHz

Closed

Open

Closed

100iMHz

Open

Closed

Closed

CPU TYPE SELECTION

Type

JP1

JP2

JP11

JP12

JP14

CX 486S

1 & 2

2 & 3

2 & 3

1 & 2

2 & 3

80486SX

2 & 3

1 & 2

3 & 4

2 & 3

2 & 3

CX 486DX

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

80486DX

2 & 3

1 & 2

3 & 4

2 & 3

1 & 2

AM486DX

2 & 3

1 & 2

3 & 4

2 & 3

1 & 2

80486DX2

2 & 3

1 & 2

3 & 4

2 & 3

1 & 2

80486DX4

2 & 3

1 & 2

3 & 4

2 & 3

1 & 2

P24D

2 & 3

1 & 2

1 & 2, 3 & 4

2 & 3

1 & 2, 3 & 4

P24T

2 & 3

1 & 2

3 & 4

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)

Type

JP15

JP16

JP18

JP19

JP20

CX 486S

Open

Open

2 & 3

2 & 3

Open

80486SX

Open

Open

2 & 3

4 & 5

Open

CX 486DX

3 & 4

Open

2 & 3

2 & 3

Open

80486DX

3 & 4

Open

2 & 3

4 & 5

Open

AM486DX

3 & 4

Open

2 & 3

4 & 5

Open

80486DX2

3 & 4

Open

2 & 3

4 & 5

Open

80486DX4

3 & 4

Open

2 & 3

4 & 5

Open

P24D

3 & 4

Closed

1 & 2

4 & 5

Open

P24T

2 & 3

Open

1 & 2

1 & 2

Open

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)

Type

JP21

JP22

JP23

JP32

CX 486S

Open

2 & 3

2 & 3

1 & 2

80486SX

1 & 2

Open

Open

1 & 2

CX 486DX

Open

2 & 3

2 & 3

1 & 2

80486DX

1 & 2

Open

Open

1 & 2

AM486DX

1 & 2

Open

Open

1 & 2

80486DX2

1 & 2

Open

Open

1 & 2

80486DX4

1 & 2

Open

Open

1 & 2

P24D

2 & 3

1 & 2

Open

1 & 2

P24T

Open

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION

Voltage

JP24

3.3v

Pins 3 & 5, 4 & 6 closed

5v

Pins 1 & 3, 2 & 4 closed

VL BUS WAIT STATE SELECTION

Setting

JP25

 

0

Pins 1 & 2 closed

»

1

Pins 2 & 3 closed

VL BUS SPEED SELECTION

Speed

JP26

 

<= 33MHz

Pins 1 & 2 closed

»

>33 MHz

Pins 2 & 3 closed