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





SY-25 Q/R

SOYO COMPUTER CO., LTD.

SY-25 Q/R

Processor

UMCU5S/AM486SX/80486SX/CX486DX/AM486DX/AM486DXL/ 80486DX/SL80486DX/CX486DX2/AM486DX2/80486DX2/ SL80486DX2/AM486DX4/SL80486DX4/P24D/P24T

Processor Speed

25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/ 100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

64MB

Maximum Video Memory

None

Cache

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

Turbo switch

J21

Speaker

J18

Turbo LED

J22

Reset switch

J19

Green PC connector

JP25

External battery

J20

32-bit VESA local bus slots

SL1 Ė SL3

USER CONFIGURABLE SETTINGS

Function

Label

Position

Ľ

CMOS memory normal operation

J20

Pins 2 & 3 closed

 

CMOS memory clear

J20

Pins 3 & 4 closed

 

Battery type select external

J20

Closed

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

None

None

2MB

(4) 256K x 9

(1) 256K x 36

None

4MB

(4) 1M x 9

None

None

5MB

(4) 256K x 9

(1) 1M x 36

None

6MB

(4) 256K x 9

(1) 256K x 36

(1) 1M x 36

8MB

(4) 1M x 9

(1) 1M x 36

None

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 4M x 9

None

None

17MB

(4) 256K x 9

(1) 4M x 36

None

18MB

(4) 256K x 9

(1) 256K x 36

(1) 4M x 36

20MB

(4) 1M x 9

(1) 4M x 36

None

24MB

(4) 1M x 9

(1) 1M x 36

(1) 4M x 36

32MB

(4) 4M x 9

(1) 4M x 36

None

36MB

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

64MB

(4) 16M x 9

None

None

1MB

None

(1) 256K x 36

None

2MB

None

(1) 256K x 36

(1) 256K x 36

2MB

None

(1) 512K x 36

None

4MB

None

(1) 512K x 36

(1) 512K x 36

4MB

None

(1) 1M x 36

None

5MB

None

(1) 256K x 36

(1) 1M x 36

6MB

(4) 1M x 9

(1) 256K x 36

(1) 256K x 36

6MB

None

(1) 512K x 36

(1) 1M x 36

8MB

None

(1) 1M x 36

(1) 1M x 36

8MB

None

(1) 2M x 36

None

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

12MB

None

(1) 1M x 36

(1) 2M x 36

16MB

None

(1) 2M x 36

(1) 2M x 36

SIMM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

16MB

None

(1) 4M x 36

None

17MB

None

(1) 256K x 36

(1) 4M x 36

18MB

(4) 4M x 9

(1) 256K x 36

(1) 256K x 36

18MB

None

(1) 512K x 36

(1) 4M x 36

20MB

None

(1) 1M x 36

(1) 4M x 36

24MB

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

32MB

None

(1) 4M x 36

(1) 4M x 36

32MB

None

(1) 8M x 36

None

36MB

(4) 4M x 9

(1) 1M x 36

(1) 4M x 36

36MB

None

(1) 1M x 36

(1) 8M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

48MB

None

(1) 4M x 36

(1) 8M x 36

64MB

None

(1) 8M x 36

(1) 8M x 36

Note: Board also accepts x 32 SIMMs. Do not use any other combination of SIMM configuration.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

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

256KB (A)

Pins 2 & 3 closed

Pins 2 & 3 closed

256KB (B)

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

CPU SPEED SELECTION

Speed

JP4

JP5

JP6

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

80iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

CPU TYPE SELECTION

Type

JP11

JP12

JP13

JP14

JP15

UMC U5S

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

AM486SX

Open

2 & 3

2 & 3

2 & 3

2 & 3

80486SX

Open

2 & 3

2 & 3

2 & 3

2 & 3

CX486DX (5v)

1 & 2, 3 & 4

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

2 & 3

2 & 3

AM486DX

Open

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

AM486DXL (5v)

2 & 3

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

80486DX

Open

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

SL80486DX

1 & 2

1 & 2

1 & 2, 3 & 4

2 & 3

2 & 3

CX486DX2 (5v)

1 & 2, 3 & 4

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

2 & 3

2 & 3

CX486DX2-66 (3.6v)

1 & 2, 3 & 4

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

1 & 2

1 & 2

CX486DX2-80 (4v)

1 & 2, 3 & 4

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

1 & 2

1 & 2

AM486DX2

Open

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

AM486DX2-80 (3.45v)

Open

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

AM486DXL2 (5v)

2 & 3

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

80486DX2

Open

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

SL80486DX2

1 & 2

1 & 2

1 & 2, 3 & 4

2 & 3

2 & 3

AM486DX4 (3.45v)

Open

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

SL80486DX4 (3.45v)

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

1 & 2

SL80486DX4 (5v)

1 & 2

1 & 2

1 & 2, 3 & 4

2 & 3

2 & 3

P24D

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

2 & 3

2 & 3

P24T

1 & 2

1 & 2

1 & 2, 3 & 4

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CONíT)

Type

JP16

JP17

JP18

JP19

UMC U5S

2 & 3

3 & 4

1 & 2

Open

AM486SX

2 & 3

Open

Open

Open

80486SX

2 & 3

Open

Open

Open

CX486DX (5v)

2 & 3

1 & 2

2 & 3, 4 & 5

2 & 3

AM486DX

2 & 3

1 & 2

Open

Open

AM486DXL (5v)

2 & 3

1 & 2, 3 & 4

1 & 2

Open

80486DX

2 & 3

1 & 2

Open

Open

SL80486DX

2 & 3

1 & 2

5 & 6

1 & 2, 3 & 4

CX486DX2 (5v)

2 & 3

1 & 2

2 & 3, 4 & 5

2 & 3

CX486DX2-66 (3.6v)

1 & 2

1 & 2

2 & 3, 4 & 5

2 & 3

CX486DX2-80 (4v)

1 & 2

1 & 2

2 & 3, 4 & 5

2 & 3

AM486DX2

2 & 3

1 & 2

Open

Open

AM486DX2-80 (3.45v)

1 & 2

1 & 2

Open

Open

AM486DXL2 (5v)

2 & 3

1 & 2, 3 & 4

1 & 2

Open

80486DX2

2 & 3

1 & 2

Open

Open

SL80486DX2

2 & 3

1 & 2

5 & 6

1 & 2, 3 & 4

AM486DX4 (3.45v)

1 & 2

1 & 2

Open

Open

SL80486DX4 (3.45v)

1 & 2

1 & 2

5 & 6

1 & 2, 3 & 4

SL80486DX4 (5v)

2 & 3

1 & 2

5 & 6

1 & 2, 3 & 4

P24D

2 & 3

1 & 2

3 & 4, 5 & 6

1 & 2, 3 & 4

P24T

2 & 3

2 & 3

5 & 6

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION

Type

JP20

JP26

JP27

UMC U5S

Open

Open

Open

AM486SX

Open

Open

Open

80486SX

Open

Open

Open

CX486DX (5v)

Open

Open

Open

AM486DX

Open

Open

Open

AM486DXL (5v)

Open

Open

Open

80486DX

Open

Open

Open

SL80486DX

Open

Open

Open

CX486DX2 (5v)

Open

Open

Open

CX486DX2-66 (3.6v)

Open

Open

Pins 3 & 4closed

CX486DX2-80 (4v)

Open

Open

Pins 5 & 6closed

AM486DX2

Open

Open

Open

AM486DX2-80 (3.45v)

Open

Closed

Pins 1 & 2 closed

AM486DXL2 (5v)

Open

Open

Open

80486DX2

Open

Open

Open

SL80486DX2

Open

Open

Open

AM486DX4 (3.45v)

Open

Open

Pins 1 & 2 closed

SL80486DX4 (3.45v)

Open

Open

Pins 1 & 2 closed

SL80486DX4 (5v)

Open

Open

Open

P24D

Open

Open

Open

P24T

Open

Open

Open

Note: Pins designated should be in the closed position.