Micronics JX30WB User manual

JX30WB VL/ISA
SYSTEM BOARD
MANUAL
Specification Subject to Change Without Notice
Copyright 1994, Micronics Computers, Inc.
All Rights Reserved
Printed in USA

MICRONICS
JX30WB VL/ISA
SYSTEM BOARD
MANUAL
Document Number: 06-00192-01, Rev 1B
August 1994
232 E. Warren Ave., Fremont, CA 94539-7085

Micronics Computers, Inc.ii
Copyright Notices
Micronics Computers, Inc.
The information contained in the JX30WB VL/ISA system
board manual has been carefully checked and is believed to
be accurate. Micronics assumes no responsibility for any
inaccuracies that may be contained in this document.
Micronics makes no commitments to update or to keep the
information in this manual at a current level when changes
are made to the product.
Micronics reserves the right to make improvements to this
document and/or product at any time and without notice.
No part of this document may be photocopied, reproduced,
translated, or reduced to any medium or machine form
without prior, written consent from Micronics.
COPYRIGHT (C) 1994, Micronics Computers, Inc.
232 E. Warren Ave., Fremont, California 94539-7085
Portions of the Manual
Portions of this manual were copied (with permission) from
Phoenix Technologies, Ltd. Copyright 1994. All rights
reserved.
Trademarks
IBM is a registered trademark of International Business Machines.
Microsoft, Microsoft Word, Windows are registered trademarks of Microsoft
Corporation.
Intel and PCI are registered trademarks of Intel Corporation.
UNIX is a registered trademark of AT&T Corporation.
Lotus 1-2-3 is a registered trademark of Lotus Development Corp.

Micronics Computers, Inc. iii
Table of Contents
Copyright Notices ............................................................................. ii
Micronics Computers, Inc. ............................................................ ii
Portions of the Manual ..................................................................ii
Trademarks ................................................................................... ii
Chapter 1: Introduction.................................................................1-1
Features...................................................................................... 1-2
Software Compatibility .............................................................. 1-3
Chapter 2: Setting Up the JX30WB ................................ .............. 2-1
Precautions................................................................................. 2-1
Static Electricity ................................ ................................ ......... 2-1
Office Environment....................................................................2-1
JX30WB Components ............................................................... 2-2
Jumper Settings..........................................................................2-3
Chapter 3: Installing Add-On Peripherals and System Memory ...3-1
Installing a VL-Bus Card ........................................................... 3-1
Cache Memory................................ ................................ ........... 3-2
System Memory .........................................................................3-3
Installing the SIMMs .................................................................3-3
Removing the SIMMs ................................................................ 3-4
Memory Configuration .............................................................. 3-4
SIMM-Types Supported ............................................................ 3-5
Installing an Enhanced CPU ...................................................... 3-5
Installing Cache Memory ........................................................... 3-6
128K of Level 2 Cache ................................ ........................... 3-7
Write-Through....................................................................3-7
Write-Back .........................................................................3-7
256K of Level 2 Cache ................................ ........................... 3-8
Write-Through....................................................................3-8
Write-Back .........................................................................3-8
512K of Level 2 Cache ................................ ........................... 3-9
Write-Through....................................................................3-9
Write-Back .........................................................................3-9

Micronics Computers, Inc.iv
Table of Contents (Cont’d)
Chapter 3 (Cont’d)
1MB of Level 2 Cache ......................................................... 3-10
Write-Through ................................................................. 3-10
Write-Back ....................................................................... 3-10
Chapter 4: Installing and Configuring the JX30WB .................... 4-1
Installation ................................................................................. 4-1
Tools Required .......................................................................... 4-1
Equipment Required .................................................................. 4-2
Configuration................................................................ ............. 4-2
Initial Boot Up ........................................................................... 4-3
Setup.......................................................................................... 4-3
Running The Setup Procedure ................................................... 4-4
Setting the CMOS Main Screen ................................................. 4-6
System Time and Date ........................................................... 4-6
Diskette A or B ................................................................ ...... 4-6
Hard Disk 1, 2, 3, or 4 ........................................................... 4-6
Base Memory and Extended Memory ................................... 4-6
Video Card............................................................................. 4-7
System Speed......................................................................... 4-7
CPU Type ................................ ................................ .............. 4-7
Cache State ............................................................................ 4-7
External Cache Mode ............................................................. 4-8
Setting the CMOS Extended Screen .......................................... 4-8
System BIOS ................................................................ ......... 4-8
Video BIOS ........................................................................... 4-8
On-Board Floppy ................................................................... 4-9
Primary IDE ........................................................................... 4-9
Master Speed...................................................................... 4-9
Slave Speed........................................................................ 4-9
Secondary IDE ..................................................................... 4-10
Serial Port 1 (Com 1) ........................................................... 4-10
Serial Port 2 (Com 2) ........................................................... 4-10
Parallel Port (LPT) ............................................................... 4-10
Parallel Port Mode ............................................................... 4-11
Standby Break Event IRQ .................................................... 4-11

Micronics Computers, Inc. v
Energy Saving Timer ........................................................... 4-11
Table of Contents (Cont’d)
Chapter 4 (Cont’d)
Non-Cacheable Area ................................ ............................ 4-12
Keyboard................................ .............................................. 4-12
System Password..................................................................4-13
Setup Password ....................................................................4-13
Re-Configuring Your Computer .............................................. 4-14
Appendix A: Post and Boot Error Messages ................................ A-1
Appendix B: Beep Codes ................................ ............................. B-1
Appendix C: Hard Disk Types ................................ ..................... C-1
Appendix D: Specifications ......................................................... D-1
Battery Disposal ........................................................................ D-3
Environmental Specifications ................................................... D-3
Temperature Range ................................ ............................... D-3
Relative Humidity (Non-Condensing) .................................. D-3
Glossary........................................................................................ G-1
Limited Warranty......................................................................... W-1
List of Figures
Figure 2-1. JX30WB Rev. 1B System Board ................................ 2-2
Figure 3-1. Inserting a VESA Local Bus Card ............................... 3-2
Figure 3-2. Installing the SIMM .................................................... 3-3
Figure 3-3. Installing 128K of Level 2 Cache ................................ 3-7
Figure 3-4. Installing 256K of Level 2 Cache ................................ 3-8
Figure 3-5. Installing 512K of Level 2 Cache ................................ 3-9
Figure 3-6. Installing 1MB of Level 2 Cache .............................. 3-10
Figure 4-1. Power-Up Screen ......................................................... 4-3
Figure 4-2. CMOS Main Screen ................................ .................... 4-4
Figure 4-3. CMOS Extended Screen ................................ .............. 4-5
Figure 4-4. Exit Pop-up Screen .................................................... 4-14

Micronics Computers, Inc.vi
Table of Contents (Cont’d)
List of Tables
Table 2-1. BIOS Operation Selection ................................ ............ 2-3
Table 2-2. Video Monitor Display Selection ................................. 2-3
Table 2-3. Printer Port Configuration Selection ............................ 2-4
Table 2-4. CMOS Reset Selection ................................................. 2-4
Table 2-5. SMI Configuration Selection ................................ ........ 2-5
Table 2-6. Local Bus IDE Selection .............................................. 2-5
Table 2-7. CPU Clock Selection .................................................... 2-5
Table 2-8. Cache Size Selection .................................................... 2-6
Table 2-9. CPU Type Selection (Jumpers W11-W21) ................... 2-7
Table 2-10. CPU Type Selection (Jumpers W22-W28) ................. 2-8
Table 2-11. Reserved Jumpers ....................................................... 2-9
Table 2-12. Peripheral and Case Connections ............................. 2-10
Table 3-1. DRAM Memory Configuration ................................ .... 3-4
Table A-1. POST Messages ...........................................................A-1
Table B-1. Beep Codes ................................................................ ..B-2
Table C-1. Hard Disk Types ................................ .......................... C-1

Micronics Computers, Inc. 1-1
Introduction
The Micronics JX30WB system board is Micronics’ fourth
generation VL-Bus system board, offering outstanding
features for building an advanced personal computer or
workstation.
The JX30WB supports all 486 processors, including the
new Intel DX4-100 processor, which requires a 3.3 volt
power supply. The system board automatically senses the
type of CPU and its voltage requirements, then configures
itself accordingly. In addition, the JX30WB utilizes level 1
write-back cache now available on the latest 486 processors.
The JX30WB is also a "Green board," which means it
adheres to the Environmental Protection Agency’s strict
Energy Star efficiency guidelines. The system board can
reduce power to consume less energy, thus making it a
more efficient system board.
The system board comes complete and ready to be installed.
It is designed to be installed with minimal or no help.
1

Introduction JX30WB System Board
1-2Micronics Computers, Inc.
Features
The JX30WB includes the following features:
• Two 32-bit VL-Bus\ISA slots and five 16-bit ISA slots.
• 100% VESA VL-Bus compliant.
• EPA Energy Star compliant when used with other
energy efficient components. User-defined time
intervals.
• Micronics’ JX30WB chip set, with Mode 3 VL IDE
controller.
• Supports up to 128MB of on-board Memory.
• 4-layer, Baby AT form-factor (13" X 8.5").
• Supports the following processors (write-through and
write-back cache versions) in the Zero Insertion Force
(ZIF) CPU socket:
−486SX 25 or 33MHz
−486 SX2 50MHz
−486 DX 33MHz
−486 DX2 50 or 66MHz
−486 DX4 75 or 100MHz

JX30WB System Board Introduction
Micronics Computers, Inc. 1-3
Software Compatibility
The JX30WB system board has been tested thoroughly
under a variety of software packages. A sampling of
programs include products by Microsoft, Novell, IBM, and
Santa Cruz Operation.

Micronics Computers, Inc. 1-1
Introduction ................................................................................... 1-1
Features...................................................................................... 1-2
Software Compatibility .............................................................. 1-3

Micronics Computers, Inc. 2-1
Setting Up the JX30WB
Precautions
Although the JX30WB system board is securely packed in
its shipping container, use care while unpacking the system
board. After unpacking the JX30WB, place it on its anti-
static bag. Carefully inspect the board for damage that may
have occurred during shipment, making sure the jumper
pins are not bent.
Static Electricity
The JX30WB is shipped in an anti-static bag; however, it is
still important that you and your work area are static free.
Ground yourself first and then ground the board.
Office Environment
When installing the JX30WB, make sure the finished
product is in an area with good ventilation. The system
should not be in direct sunlight; near heaters; or exposed to
moisture, dust, or dirt.
2

Setting Up the JX30WB JX30WB System Board
2-2Micronics Computers, Inc.
JX30WB Components
Figure 2-1. JX30WB Rev. 1B System Board
Danger of explosion if battery is incorrectly replaced. The battery should only be
replaced by an authorized technician, using the same or equivalent recommended by
the manufacturer. Discard used batteries according to the manufacturer’s instructions.

JX30WB System Board Setting Up the JX30WB
Micronics Computers, Inc. 2-3
NOTE: Refer to Appendix D for battery disposal
instructions.
Jumper Settings
Table 2-1 lists jumper settings for the BIOS operation.
Table 2-1. BIOS Operation Selection
Jumper
Function
Setting
W1
BIOS Recovery
Normal (Default)
1-2
2-3
W31
BIOS
Write Protect (Default)
BIOS Write Enable
1-2
Open
NOTE: Jumper W31 must be reconfigured to update
(Flash) the BIOS. If problems occur during the
flash procedure, reset W1 to the BIOS Recovery
Mode. A special diskette is also needed for the
recovery mode. Refer to your computer dealer for
the Flash Utility diskette and the special recovery
diskette, or call Micronics’ BBS number at (510)
651-6837 to download the utility.
Table 2-2 lists jumper settings for the type of video monitor
display used with the system board.
Table 2-2. Video Monitor Display Selection
Jumper
Function
Setting
W2
Color (Default)
Monochrome
1-2
Open

Setting Up the JX30WB JX30WB System Board
2-4Micronics Computers, Inc.

JX30WB System Board Setting Up the JX30WB
Micronics Computers, Inc. 2-5
Jumper Settings (Cont’d)
Table 2-3 lists jumper settings for the printer port
configuration.
Table 2-3. Printer Port Configuration Selection
Jumper
Function
Setting
W3
ECP uses DMA1
ECP uses DMA3
ECP Disabled (Default)
1-2
2-3
Open
W4
ECP uses DMA1
ECP uses DMA3
ECP Disabled (Default)
1-2
2-3
Open
W8
IRQ 7 (Default)
IRQ 5
1-2
2-3
Table 2-4 lists jumper settings for the CMOS reset
selection.
Table 2-4. CMOS Reset Selection
Jumper
Function
Setting
W5
Normal (Default)
Reset CMOS
1-2
2-3
WARNING: Power must be off during CMOS reset
procedure.

Setting Up the JX30WB JX30WB System Board
2-6Micronics Computers, Inc.
Jumper Settings (Cont’d)
Table 2-5 lists jumper settings for the SMI configuration.
Table 2-5. SMI Configuration Selection
Jumper
Function
Setting
W6
Break Switch Function
Normal (Default
)
1-2
2-3
Table 2-6 lists jumper settings for the Local Bus IDE.
Table 2-6. Local Bus IDE Selection
Jumper
Function
Setting
W7
Local IDE Enable (Default)
Local IDE Disable
1-2
2-3
Table 2-7 lists jumper settings for the CPU Clock selection.
Table 2-7. CPU Clock Selection
Jumper
Function
Setting
W10
25 MHz
33 MHz
Open
1-2

JX30WB System Board Setting Up the JX30WB
Micronics Computers, Inc. 2-7
Jumper Settings (Cont’d)
Table 2-8 lists jumper settings for level 2 cache
configuration selections.
Table 2-8. Cache Size Selection
Cache W13 W14 W15 W17 W30
128K
1-2
1-2
1-2
1-2 & 3-4
Open
256K
2-3
2-3
1-2
2-3 & 4-5
Open
512K
2-3
1-2
1-2
1-2 & 3-4
1-2
1M
2-3
2-3
2-3
2-3 & 4-5
1-2