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J-446A (V2.0)

J-MARK COMPUTER CORPORATION

J-446A (V2.0)

Processor

80486SX/AM486DX2/CX486DX2/80486DX2/CX486DX4/AM486DX4/

AM486DX4(WB)/AM486DX4(WT)/80486DX4(WB)/80486DX4(WT)/

P24D/P24T/CX5X86/AM5X86

Processor Speed

25/33/40/50(internal)/50/66(internal)/80(internal)/100(internal)/ 120(internal)MHz

Chip Set

SIS

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

128/256KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

IDE interface LED

JP33

IDE interface 2

CN2

Green PC connector

JP35

IDE interface 1

CN3

Turbo LED

JP37

Floppy drive interface

CN4

Reset switch

JP38

Serial port 1

CN5

Turbo switch

JP39

Serial port 2

CN6

Power LED & keylock

JP40

External battery

JP1

Green PC LED

LED1

Speaker

JP27

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Label

Position

Ľ

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

Ľ

Factory configured - do not alter

JP13

Unidentified

Ľ

BIOS type select EPROM

JP19

Open

 

BIOS type select 5v flash

JP19

Pins 2 & 3 closed

 

BIOS type select 12v flash

JP19

Pins 1 & 2 closed

Ľ

Factory configured - do not alter

JP21

Unidentified

 

Turbo enabled

JP39

Pins 2 & 3 closed

 

Turbo disabled

JP39

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 512K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

3MB

(1) 512K x 36

(1) 256K x 36

None

None

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

None

3MB

(1) 256K x 36

(1) 512K x 36

None

None

4MB

(1) 1M x 36

None

None

None

4MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 1M x 36

(1) 256K x 36

None

None

5MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

None

6MB

(1) 1M x 36

(1) 512K x 36

None

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

6MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

None

7MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

8MB

(1) 2M x 36

None

None

None

8MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

8MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

9MB

(1) 2M x 36

(1) 256K x 36

None

None

10MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

None

10MB

(1) 2M x 36

(1) 512K x 36

None

None

10MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

11MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

None

12MB

(1) 2M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

14MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

16MB

(1) 4M x 36

None

None

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

17MB

(1) 4M x 36

(1) 256K x 36

None

None

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

None

18MB

(1) 4M x 36

(1) 512K x 36

None

None

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 512K x 36

(1) 512K x 36

None

20MB

(1) 4M x 36

(1) 1M x 36

None

None

20MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

None

20MB

(1) 1M x 36

(1) 4M x 36

None

None

22MB

(1) 4M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

None

24MB

(1) 4M x 36

(1) 2M x 36

None

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 2M x 36

(1) 4M x 36

None

None

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 8M x 36

None

None

None

32MB

(1) 4M 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

33MB

(1) 8M x 36

(1) 256K x 36

None

None

34MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

None

34MB

(1) 8M x 36

(1) 512K x 36

None

None

35MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

36MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

None

36MB

(1) 8M x 36

(1) 1M x 36

None

None

38MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

40MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

None

40MB

(1) 8M x 36

(1) 2M x 36

None

None

40MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

44MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

None

48MB

(1) 8M x 36

(1) 4M x 36

None

None

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

52MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

56MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

64MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

None

64MB

(1) 8M 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

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

None

80MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

100MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

104MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

112MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

128KB

(4) 32K x 8

(1) 8K x 8

256KB

(4) 64K x 8

(1) 16K x 8

CACHE JUMPER CONFIGURATION

Size

JP7

JP8

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JP11

JP12

25MHz

Open

Pins 1 & 2 closed

33MHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

40MHz

Pins 1 & 2 closed

Pins 1 & 2 closed

50iMHz

Open

Pins 1 & 2 closed

50MHz

Pins 3 & 4 closed

Pins 2 & 3 closed

66iMHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

80iMHz

Pins 1 & 2 closed

Pins 1 & 2 closed

100iMHz

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

120iMHz

Pins 1 & 2 closed

Pins 1 & 2 closed

CPU TYPE SELECTION

Type

JP9

JP10

JP14

JP15

JP16

80486SX

Open

2 & 3

Open

Open

Open

AM486DX2

2 & 3

2 & 3

Open

Open

2 & 3

CX486DX2

2 & 3

2 & 3

Open

Open

Open

80486DX2

2 & 3

2 & 3

Open

Open

Open

CX486DX4

2 & 3

2 & 3

Open

Open

Open

AM486DX4

2 & 3

1 & 2

Open

1 & 2

1 & 2

AM486DX4 (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

AM486DX4 (WT)

2 & 3

2 & 3

Open

Open

1 & 2

80486DX4 (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

80486DX4 (WT)

2 & 3

2 & 3

Open

Open

Open

P24D

2 & 3

1 & 2

Open

1 & 2

1 & 2

P24T

1 & 2

1 & 2

1 & 2

Open

Open

CX5X86

2 & 3

2 & 3

Open

1 & 2

Open

AM5X86

2 & 3

1 & 2

Open

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CONíT)

Type

JP17

JP20

JP23

JP24

JP25

80486SX

2 & 3

Closed

1 & 2

4 & 5

2 & 3

AM486DX2

Open

Open

Open

4 & 5

1 & 2, 3 & 4

CX486DX2

1 & 2

Closed

Open

2 & 3

1 & 2, 3 & 4

80486DX2

2 & 3

Closed

1 & 2

4 & 5

1 & 2, 3 & 4

CX486DX4

1 & 2

Closed

Open

2 & 3

1 & 2, 3 & 4

AM486DX4

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

AM486DX4 (WB)

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

AM486DX4 (WT)

Open

Open

Open

4 & 5

1 & 2, 3 & 4

80486DX4 (WB)

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

80486DX4 (WT)

2 & 3

Closed

1 & 2

4 & 5

1 & 2, 3 & 4

P24D

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

P24T

2 & 3

Closed

Open

1 & 2

1 & 2, 3 & 4

CX5X86

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

AM5X86

2 & 3

Closed

2 & 3

4 & 5

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CONíT)

Type

JP26

JP28

JP29

JP30

80486SX

3 & 4

Open

Open

Open

AM486DX2

3 & 4

Open

Open

Open

CX486DX2

2 & 3

2 & 3

2 & 3

Open

80486DX2

3 & 4

Open

Open

Open

CX486DX4

2 & 3

2 & 3

2 & 3

Open

AM486DX4

1 & 2, 3 & 4

Open

1 & 2

Open

AM486DX4 (WB)

1 & 2, 3 & 4

Open

1 & 2

Open

AM486DX4 (WT)

3 & 4

Open

Open

Open

80486DX4 (WB)

1 & 2, 3 & 4

Open

1 & 2

Open

80486DX4 (WT)

3 & 4

Open

Open

Open

P24D

1 & 2, 3 & 4

Open

1 & 2

Open

P24T

3 & 4

1 & 2

1 & 2

Open

CX5X86

1 & 2, 3 & 4

Open

1 & 2

Open

AM5X86

1 & 2, 3 & 4

Open

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CPU VOLTAGE CONFIGURATION

Voltage

JP31

JP32

JP34

3.3v

Pins 2 & 3 closed

Pins 5 & 6 closed

Pins 2 & 3 closed

3.45v

Pins 2 & 3 closed

Pins 3 & 4 closed

Pins 2 & 3 closed

4v

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

5v

Pins 1 & 2 closed

N/A

Pins 1 & 2 closed

GREEN PC CONFIGURATION

Setting

JP36

Doze mode

Pins 1 & 2 closed

Suspend mode

Pins 3 & 4 closed

Standby mode

Pins 5 & 6, 7 & 8 closed

CMOS CONFIGURATION

Setting

JP2

JP3

CMOS memory normal operation

Pins 1 & 2 closed

Pins 1 & 2 closed

CMOS memory clear

Pins 2 & 3 closed

Pins 2 & 3 closed

DAM CHANNEL SELECTION

Channel

JP18

JP22

1

Pins 1 & 3 closed

Pins 1 & 3 closed

3

Pins 2 & 4 closed

Pins 2 & 4 closed