CHICONY, INC.

CH-471A

Processor CX486S/80486SX/SL80486SX/CX486S2/CX486DX/AM486DXL/80486DX/ SL80486DX/ AM486DXL2/80486DX2/SL80486DX2/P24D/80486DX4/Pentium Overdrive
Processor Speed 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set SIS
Max. Onboard DRAM 128MB
Cache 32/64/128/256/512/1024KB
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
Reset switch

J3
 Speaker

J8
Green PC connector

J4
 External battery

JP19
Turbo switch

J5
 Green PC connector

JP38
Turbo LED

J6
 Green PC connector

JP39
Power LED & keylock

J7
 32-bit VESA local bus slots

SL1 - SL3


USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»
 CPU clock down control select STPCLK

JP6

pins 1 & 2 closed
  CPU clock down control select SMOUT0

JP6

pins 2 & 3 closed

»
 CMOS memory normal operation

JP7

pins 1 & 2 closed
  CMOS memory clear

JP7

pins 2 & 3 closed

»
 Factory configured - do not alter

JP17

N/A
  CPU type select all CPU types

JP22

Open
  CPU type select CX486S2 only

JP22

Closed

»
 Factory configured - do not alter

JP37

N/A

»
 Address strobe type select normal

JP40

pins 1 & 2 closed
  Address strobe type select delayed

JP40

pins 2 & 3 closed

»
 Factory configured - do not alter

JP45

N/A
Note: The location of JP40 is unidentified.


DRAM 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) 512K x 36

(1) 1M x 36

NONE

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

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) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 8M x 36

NONE

NONE

NONE


DRAM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

40MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

NONE

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) 8M x 36

(1) 8M x 36

72MB

(1) 1M x 36

(1) 1M x 36

(1) 16M x 36

NONE

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) 8M x 36

(1) 8M x 36

96MB

(1) 8M 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

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 16M x 36

(1) 16M x 36

NONE

NONE


CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

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) 16K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 8


CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

JP5

JP14

JP16

32KB

1 & 2, 3 & 4

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

64KB

2 & 3, 4 & 5

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2, 3 & 4

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

256KB

2 & 3, 4 & 5

1 & 2

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

512KB

1 & 2, 3 & 4

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

1MB

2 & 3, 4 & 5

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3
Note: Pins designated should be in the closed position.


CPU TYPE CONFIGURATION

Type

JP10

JP11

JP20

JP21

JP23

CX486S

2 & 3

1 & 2

2 & 3

Open

Open

80486SX

1 & 2

2 & 3

2 & 3

Open

Open

SL80486SX

1 & 2

2 & 3

2 & 3

Open

1 & 2

CX486DX

2 & 3

1 & 2

1 & 2

Closed

Open

AM486DXL

1 & 2

2 & 3

1 & 2

Closed

Open

80486DX

1 & 2

2 & 3

1 & 2

Closed

Open

SL80486DX

1 & 2

2 & 3

1 & 2

Closed

1 & 2

CX486DX2

2 & 3

1 & 2

1 & 2

Closed

Open

AM486DXL2

1 & 2

2 & 3

1 & 2

Closed

Open

SL80486DX2

1 & 2

2 & 3

1 & 2

Closed

1 & 2

P24D

1 & 2

2 & 3

1 & 2

Closed

2 & 3

80486DX4

1 & 2

2 & 3

1 & 2

Closed

1 & 2

P24T

1 & 2

1 & 2

1 & 2

Closed

Open
Note: Pins designated should be in the closed position.


CPU TYPE CONFIGURATION

Type

JP24

JP25

JP26

JP27

JP28

CX486S

2 & 3

2 & 3, 4 & 5

1 & 2, 3 & 4

Open

Open

80486SX

Open

Open

Open

Open

Open

SL80486SX

4 & 5

3 & 4

2 & 3

Open

Open

CX486DX

2 & 3

2 & 3

1 & 2, 3 & 4

Open

Open

AM486DXL

Open

Open

Open

Open

Open

80486DX

Open

Open

Open

Open

Open

SL80486DX

4 & 5

3 & 4

2 & 3

Open

Open

CX486DX2

2 & 3

2 & 3

1 & 2, 3 & 4

Open

Open

AM486DXL2

Open

Open

Open

Open

Open

SL80486DX2

4 & 5

3 & 4

2 & 3

Open

Open

P24D

4 & 5

1 & 2, 3 & 4

2 & 3

Closed

Closed

80486DX4

4 & 5

3 & 4

2 & 3

Open

Open

P24T

1 & 2

3 & 4

2 & 3

Open

Open
Note: Pins designated should be in the closed position.


CPU TYPE CONFIGURATION

Type

JP29

JP30

JP31

JP33

JP36

CX486S

2 & 3

2 & 3

Open

2 & 3

1 & 2

80486SX

2 & 3

Open

Open

Open

Open

SL80486SX

2 & 3

Open

Open

Open

1 & 2

CX486DX

2 & 3

2 & 3

3 & 4

2 & 3

1 & 2

AM486DXL

2 & 3

3 & 4

1 & 2

Open

2 & 3

80486DX

2 & 3

Open

3 & 4

Open

Open

SL80486DX

2 & 3

Open

3 & 4

Open

1 & 2

CX486DX2

2 & 3

2 & 3

3 & 4

2 & 3

1 & 2

AM486DXL2

2 & 3

3 & 4

1 & 2

Open

2 & 3

SL80486DX2

2 & 3

Open

3 & 4

Open

1 & 2

P24D

1 & 2

Open

3 & 4

Open

1 & 2

80486DX4

2 & 3

Open

3 & 4

Open

1 & 2

P24T

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2
Note: Pins designated should be in the closed position.


CPU SPEED CONFIGURATION

Speed

JP8

JP12

JP13

20MHz

Open

Open

Open

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

100iMHz

Closed

Closed

Closed


CPU VOLTAGE CONFIGURATION

Voltage

JP32

JP34

JP35

3.3v

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

5v

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed


VESA WAIT STATE CONFIGURATION

Wait states

JP44

0 wait states

pins 1 & 2 closed

1 wait state

pins 2 & 3 closed


BUS SPEED CONFIGURATION

CPU speed

JP47

<= 33MHz

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed

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