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





416SX/420SX/425SX/433SC/450SC

CHAINTECH COMPUTER COMPANY, LTD.

416SX/420SX/425SX/433SC/450SC

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

SIS

Max. Onboard DRAM

64MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

Speaker

J4

Turbo switch

J2

Power LED & keylock

J5

Turbo LED

J3

External battery

J7

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Turbo enabled

J2

Closed

 

Turbo disabled

J2

Open

Monitor type select monochrome

J6

Open

 

Monitor type select color

J6

Closed

Factory configured - do not alter

JP7

Open

CMOS memory normal operation

JP17

pins 1 & 2 closed

 

CMOS memory clear

JP17

pins 2 & 3 closed

Factory configured - do not alter

JP18

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

1MB

(1) 256K x 36

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

4MB

(4) 1M x 9

NONE

NONE

NONE

4MB

(1) 1M x 36

NONE

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(4) 1M x 9

(4) 1M x 9

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

(4) 4M x 9

NONE

NONE

NONE

18MB

(4) 256K x 9

(4) 256K x 9

(1) 4M x 36

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

NONE

24MB

(1) 4M x 36

(1) 1M x 36

(4) 1M x 9

NONE

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(1) 1M x 36

(4) 4M x 9

(4) 4M x 9

NONE

36MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

NONE

36MB

(1) 4M x 36

(1) 4M x 36

(4) 1M x 9

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(4) 4M x 9

(4) 4M x 9

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

40MB

(1) 4M x 36

(1) 4M x 36

(4) 1M x 9

(4) 1M x 9

40MB

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

NONE

48MB

(1) 4M x 36

(1) 4M x 36

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(4) 4M x 9

(4) 4M x 9

DRAM JUMPER CONFIGURATION

Type

JP1

JP2

JP20

JP21

Option 1

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Option 2

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

Note: Option 1- Banks 0 & 1 use x 9 SIMMS and Banks 2 & 3 use X 36 SIMMS.

Option 2- Banks 0 & 1 use x 36 SIMMS and Banks 2 & 3 use X 9 SIMMS.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

32KB

(4) 8K x 8

NONE

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP11

32KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

64KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CACHE JUMPER CONFIGURATION (CON'T)

Size

JP12

JP13

JP14

JP15

JP16

32KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

64KB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

128KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

256KB

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP4

JP5

JP6

80486SX

pins 2 & 3 closed

Open

Open

ODP486SX

pins 1 & 2 closed

Closed

pins 2 & 3 closed

80487SX

pins 1 & 2 closed

Closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

Closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP3

16MHz

pins 2 & 3 closed

20MHz

pins 2 & 3 closed

> 25MHz

pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTE

Note:Depending on board version, cache and accompanying jumpers may not be present.