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J-404

UNIDENTIFIED

J-404

Processor

80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI/Award

Dimensions

250mm x 220mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo switch

JP13

Power LED & keylock

J21

Speaker

JP16

Turbo LED

JP12

Reset switch

S1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Factory configured - do not alter

JP24

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

U3P

U40

64KB

(4) 8K x 8

(4) 8K x 8

NONE

(1) 8K x 8

128KB

(4) 32K x 8

NONE

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

256KB

(4) 64K x 8

NONE

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP3

JP5

JP8

JP9

64KB

pins 2 & 3 closed

pins 2 & 3 closed

Open

Open

128KB

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Open

256KB

pins 2 & 3 closed

pins 2 & 3 closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP6

JP7

JP11

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

Open

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

Closed

CPU SPEED CONFIGURATION

Speed

JP18

JP19

JP20

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Closed

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Closed

Closed

Open