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JX30G VL-BUS

MICRONICS COMPUTERS, INC.

JX30G VL-BUS

Processor

80486SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

Micronics

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

Phoenix

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

IDE interface

CN2

Speaker

J30

Floppy drive interface

CN3

Power LED & keylock

J31

External battery

J8

32-bit VESA Local bus slot

S1

Serial port 2

J9

32-bit VESA Local bus slot

S2

External keyboard/PS2 style mouse

J10

Turbo LED

W18

Serial port 1

J14

Reset switch

W20

Parallel port

J16

IDE interface LED

W21

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

SW1/switch 3

Off

Factory configured - do not alter

SW1/switch 4

Off

Monitor type select color

W2

Closed

 

Monitor type select monochrome

W2

Open

PS/2 mouse enabled

W3

Closed

 

PS/2 mouse disabled

W3

Open

Parity enabled

W4

Closed

 

Parity disabled

W4

Open

Factory configured - do not alter

W6

Open

Parallel port unidirectional (for printer)

W7

pins 1 & 2 closed

 

Parallel port bi-directional

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

Factory configured - do not alter

W25

N/A

Factory configured - do not alter

W26

N/A

REAL TIME CLOCK SETTINGS

Settings

W1

W5

DALLAS Real Time Clock enabled

Closed

N/A

MOTOROLA 146818 Real Time Clock enabled

Open

N/A

DALLAS Real Time Clock clear

N/A

Closed

Real time clock normal operation

N/A

Open

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

4MB

(1) 1M x 36

NONE

NONE

NONE

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

10MB

(1) 256K x 36

(1) 256K 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) 4M x 36

NONE

NONE

NONE

18MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

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

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

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/U34

TAG/U61

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 32K x 8

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 32K x 8

Note:If Write-Through caching is not being used, the chip at U61 is not installed.

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.

CACHING METHOD CONFIGURATION

Method

Size

W16

W17

Write-Through

All

Open

Open

Write-Back

64KB

pins 1 & 2 closed

pins 1 & 2 closed

Write-Back

128KB

pins 1 & 2 closed

pins 2 & 3 closed

Write-Back

256KB

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

W12

80486SX

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

804896DX2

pins 2 & 3 closed

Pentium Overdrive

pins 2 & 3 closed

CPU PQFP CONFIGURATION

PQFP

W13

Enabled

pins 1 & 2 closed

Disabled

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

SW1/switch 1

SW1/switch 2

25MHz

Off

On

33MHz

On

On

50i MHz

Off

On

66i MHz

On

On