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





JX30G

MICRONICS COMPUTERS, INC.

JX30G

Processor

80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

Speaker

J30

Floppy drive interface

CN2

Power LED & keylock

J31

IDE interface

CN3

Turbo LED

W18

External battery

J8

Turbo switch

W19

Serial port 2

J9

Reset switch

W20

Internal keyboard connector

J13

IDE interface LED

W21

Serial port 1

J14

32-bit VESA Local bus slots

SL1 & SL2

Parallel port

J16

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Clock type select Motorola 126818

W1

Open

 

Clock type select Dallas

W1

Closed

Monitor type select color

W2

Closed

 

Monitor type select monochrome

W2

Open

On board mouse disabled (IRQ12)

W3

Open

 

On board mouse enabled (IRQ12)

W3

Closed

Parity enabled

W4

Closed

 

Parity disabled

W4

Open

Dallas clock normal operation

W5

Open

 

Dallas clock discharge

W5

Closed

Parallel port mode unidirectional

W7

pins 1 & 2 closed

 

Parallel port mode bidirectional

W7

pins 2 & 3 closed

CMOS memory normal operation

W8

pins 2 & 3 closed

 

CMOS memory clear

W8

pins 1 & 2 closed

Factory configured - do not alter

W9

Open

CPU type select 80486DX/DX2/Pentium Overdrive

W12

pins 2 & 3 closed

 

CPU type select 80486SX

W12

pins 1 & 2 closed

PQFP CPU enabled

W13

pins 1 & 2 closed

 

PQFP CPU disabled

W13

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 36

NONE

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

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) 4M x 36

NONE

NONE

NONE

20MB

(1) 1M x 36

(1) 4M x 36

NONE

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

NONE

28MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

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

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

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) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W10

W11

W22

W23

W24

64KB

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2

128KB

1 & 2

2 & 3

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.

CACHE JUMPER CONFIGURATION (WRITE BACK)

Size

W16

W17

64KB

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

Note: If write through is selected, open jumpers W16 & W17.

CPU SPEED CONFIGURATION

Speed

SW1/1

SW1/2

SW1/3

SW1/4

25MHz

Off

On

Off

Off

33MHz

On

On

Off

Off

50iMHz

Off

On

Off

Off

66iMHz

On

On

Off

Off