Acrosser Technology AR-B1653 User manual

AR-B1653 User’s Guide
1
AR-B1653
3.5” EBC with VIA Mark Processor,
VGA/ LCD/ LAN/ USB
CPU Board
User’ s Guide
Edition: 1.0
Book Number: AR-B1653-07.0701

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Table of Contents
0.PREFACE……………................................................................................................................................................... 3
0.1 COPYRIGHT NOTICE AND DISCLAIMER.....................................................................................................................................3
0.2 WELCOME TO THE AR-B1653 CPU BOARD................................................................................................................................3
0.3 BEFORE YOU USE THIS GUIDE...................................................................................................................................................3
0.4 RETURNING YOUR BOARD FOR SERVICE.................................................................................................................................3
0.5 TECHNICAL SUPPORT AND USER COMMENTS........................................................................................................................4
0.6 STATIC ELECTRICITY PRECAUTIONS.. ......................................................................................................................................4
1. INTRODUCTION.......................................................................................................................................................... 5
1.1SPECIFICATIONS............................................................................................................................................................................6
1.2 PACKING LIST................................................................................................................................................................................6
2. SETTING UP SYSTEM................................................................................................................................................ 7
2.1 AR-B1653 OVERVIEW....................................................................................................................................................................7
2.2 SYSTEM SETTINGS.......................................................................................................................................................................8
2.2.1 Keyboard & Mouse Connector (KM2).......................................................................................................................................8
2.2.2 SDRAM SOCKET 144 PIN (DIMM1)........................................................................................................................................8
2.2.3 Hard Disk (IDE) Connector (IDE1) ...........................................................................................................................................9
2.2.4 Parallel Port Connector (LPT1) ................................................................................................................................................9
2.2.5 CRT Connector (VGA1)..........................................................................................................................................................10
2.2.6 USB Connector (USB1)..........................................................................................................................................................10
2.2.7 LCD VOLTAGE SELECT (J1)................................................................................................................................................11
2.2.8 EXTERNAL BUZZER (BZ1)...................................................................................................................................................11
2.2.9 Serial Port (COM1, COM2).....................................................................................................................................................11
2.2.10 Clear CMOS (JBAT1)...........................................................................................................................................................11
2.2.11 GPIO Port (CN1) ..................................................................................................................................................................12
2.2.12 Touch Screen Connector (TSC1).........................................................................................................................................12
2.2.13 26-Pin Audio Connector (AUDIO1).......................................................................................................................................12
2.2.14 LCD Inverter Connector (CN2).............................................................................................................................................13
2.2.15 LED (LED1)..........................................................................................................................................................................13
2.2.16 Ethernet RJ-45 Connector (LAN1) .......................................................................................................................................13
2.2.17 Reset Button (RST1)............................................................................................................................................................13
2.2.18 Power Connector (PWR1)....................................................................................................................................................14
2.2.19 PC/104 Connector (PC104)..................................................................................................................................................14
2.2.20 Compact Flash Connector (CF1)..........................................................................................................................................14
2.2.21 CF Master/Salver Connector (J4).........................................................................................................................................14
2.2.22 18-bit LCD Panel Connector (LCD1)....................................................................................................................................15
2.2.23 Battery Connector (BT1).......................................................................................................................................................15
3. WATCHDOG TIMER ................................................................................................................................................. 15
3.1 WATCHDOG TIMER SETTING ....................................................................................................................................................16
3.2 WATCHDOG TIMER TRIGGER....................................................................................................................................................16
4. BIOS CONSOLE........................................................................................................................................................ 16
4.1 BIOS SETUP OVERVIEW.............................................................................................................................................................17
4.2 ADVANCED...................................................................................................................................................................................18
4.3 PERIPHERAL................................................................................................................................................................................19
4.4 PNP/PCI……………………………………………………………………………………………………………………………………….21
4.5 H/W MONITOR..............................................................................................................................................................................22
4.6 BOOT…………………………………………………………………………………………………………………………………………..23
4.7 BIOS EXIT.....................................................................................................................................................................................24
APPENDIX A. MEMORY MAP...................................................................................................................................... 24
APPENDIX B. INTERRUPT REQUEST (IRQ)............................................................................................................... 25

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0. PREFACE
0.1 COPYRIGHT NOTICE AND DISCLAIMER
This document is copyrighted, 2007, by Acrosser Technology Co., Ltd. All rights are reserved. No part of this
manual may be reproduced, copied, transcribed, stored in a retrieval system, or translated into any language or
computer language in any form or by any means, such as electronic, mechanical, magnetic, optical, chemical,
manual or other means without the prior written permission or original manufacturer.
Acrosser Technology assumes no responsibility or warranty with respect to the content in this manual and
specifically disclaims any implied warranty of merchantability or fitness for any particular purpose. Furthermore,
Acrosser Technology reserves the right to make improvements to the products described in this manual at any
times without notice. Such revisions will be posted on the Internet (WWW.ACROSSER.COM) as soon as possible.
Possession, use, or copy of the software described in this publication is authorized only pursuant to valid written
license from Acrosser or an authorized sub licensor.
ACKNOWLEDGEMENTS
Acrosser, AWARD, IBM PC/AT, VIA, Windows 3.1, MS-DOS…are registered trademarks.
All other trademarks and registered trademarks are the property of their respective owners.
0.2 WELCOME TO THE AR-B1653 CPU BOARD
This guide introduces the AcrosserAR-B1653 CPU Board.
Use information provided in this manual describes this card’s functions and features. It also helps you start, set up
and operate your AR-B1653. General system information can also be found in this publication.
0.3 BEFORE YOU USE THIS GUIDE
Please refer to the Chapter 2, “System Setting,” in this guide, if you have not already installed this AR-B1653.
Check the packing list before you install and make sure the accessories are completely included.
AR-B1653 CD provides the newest information regarding the CPU card. Please refer to the files of the
enclosed utility CD. It contains the modification and hardware & software information, and adding the
description or modification of product function after manual printed.
0.4 RETURNING YOUR BOARD FOR SERVICE
If your board requires any services, contact the distributor or sales representative from whom you purchased the
product for service information. If you need to ship your board to us for service, be sure it is packed in a protective
carton. We recommend that you keep the original shipping container for this purpose.
You can help assure efficient servicing for your product by following these guidelines:
1. Include your name, address, daytime telephone, facsimile number and E-mail.
2. A description of the system configuration and/or software at the time of malfunction.
3. A brief description of the problem occurred.

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0.5 TECHNICAL SUPPORT AND USER COMMENTS
Users comments are always welcome as they assist us in improving the quality of our products and the readability
of our publications. They create a very important part of the input used for product enhancement and revision.
We may use and distribute any of the information you provide in any way appropriate without incurring any
obligation. You may, of course, continue to use the information you provide.
If you have any suggestions for improving particular sections or if you find any errors on it, please send your
comments to Acrosser Technology Co., Ltd. or your local sales representative and indicate the manual title and
book number.
Internet electronic mail to: [e-mail]
[email protected]w
0.6 STATIC ELECTRICITY PRECAUTIONS
Before removing the board from its anti-static bag, read this section about static electricity precautions.
Static electricity is a constant danger to computer systems. The charge that can build up in your body may be more
than sufficient to damage integrated circuits on any PC board. It is, therefore, important to observe basic
precautions whenever you use or handle computer components. Although areas with humid climates are much
less prone to static build-up, it is always best to safeguard against accidents that may result in expensive repairs.
The following measures should be sufficient to protect your equipment from static discharge:
 Touch a grounded metal object to discharge the static electricity in your body (or ideally, wear a grounded
wrist strap).
 When unpacking and handling the board or other system components, place all materials on an anti-static
surface.
 Be careful not to touch the components on the board, especially the “golden finger” connectors on the
bottom of the board.

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1. INTRODUCTION
Welcome to the AR-B1653 Single Board Computer. The AR-B1653 board is EBC board,which VIA Mark
Corefusion Processors with the VIA ® advanced chipset VT82C686B. This product is designed for the system
manufacturers, integrators, or VARs that want to provide all the performance, reliability, and quality at a reasonable
price.
In addition, the AR-B1653 provides on chip VGA. The VGA, which provides up to Ture Color (32 bit) 1024x768.
The VGA memory is share main memory (2M, 4M, or 8M). AR-B1653 also has 18-bit LVDS function in the system.
The AR-B1653 is loaded with special on-board features that rival full-size systems. It has one network controller on
board, uses RealTek RTL8100C LAN controller, a fully integrated 10/100BASE-TX solution with high performance
networking functions. Supports Compact Flash™ Type II interface. Plus optional support for AC97 3D stereo
surround sound with CD-input, AR-B9425A-G (line-in, line-out and speaker-out, microphone). The AR-B1653 also
includes one 144-pin SO-DIMM sockets for up to 512 MB total on-board memory. The AR-B1653 has two on-board
serial ports; COM1 with RS232C,COM2 with RS232C share with touch screen , one USB connectors for 2 USB
ports, watchdog timer and tough industrial grade construction. All these features make the AR-B1653 a very
"system integrator friendly" solution, perfect for handling applications in the harshest unmanned environments.
VIA
VT82C686B
South Bridge
VIA
CRT
SO-DIMM
SDRAM
Processor
MARK 533
IDE1
RTL8100C
LAN
LCD
TTL
Compact Flash
IDE2
ATA 33/66
LPT 4bit
GPIO PC104BIOS
PS/2,Header
K/M
AC'97 Screen
Touch
USB
VT1612A
232/T.S
COM2
232
COM1
ISA Bus
PCI Bus
RGB
24bit
AR-B1653 System Block Diagram

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1.1 SPECIFICATIONS
 CPU: On-board VIA Mark Corefusion Processor 533MHz
 Chipset: VIA® VT82C686B
 RAM memory: Supports SDRAM PC133, on-board 144-pin SO-DIMM up to 512MB SDRAM memory
module
 VGA Controller: Embedded VGA controller, Screen Resolution: up to Ture Color(32 bit)1024x768.
 Display Interface: CRT – D-SUB 15-pin female connector
LCD–for18bitTFTLCDPanel,2x13x2.0mmpin-headerconnector
 Ultra ATA/33/66/100 IDE Interface: One PCI Enhance IDE channel. The south bridge VT82C686B supports
Ultra ATA/33 IDE interface. To support Ultra ATA66/100 Hard disk, a specified cable must be available.
 C. F.: Supports Compact Flash Type II interface
 Series ports: On-board one D-SUB 9-pin male connector for COM1 with RS-232C.On-board one
2x5x2.0mm pin-header connector for COM2 with RS-232C share with Touch Screen
Touch Screen uses 2.0mm 5-pin header connector
 Parallel Port: On-board one 2x13x2.0mm pin-header connector for Parallel port, supports SPP/EPP/ECP
modes
 USB port: On-board one 2x4x2.0mm pin-header connector for 2 USB ports
 Audio: onboard AC’97 Codec, On-board one 2x13x2.0mm pin-header for Audio interface Supports two
channel Left/Right Line IN/OUT, and Left/Right speaker out, MIC IN.
 Watchdog timer: Software programmable 1~63sec.
 Ethernet: On-board one Realtek RT8100C, supports 10/100Mbps Base-T with RJ-45 connector.
 K/B & Mouse: On-board PS/2 Keyboard and Mouse connector
 Power Req.: +5V 2.5A and +12V 1A maximum
 PC Board: 8 layers, EMI considered
 Dimensions: 145mm x 102mm (5.7” x 4”)
 Operating Temperature: 0°~ 60℃
1.2 PACKING LIST
These accessories are included with the system. Before you begin installing your AR-B1653 board, please make
sure that the following items have been included inside the AR-B1653 package.
 The quick setup manual
 1 AR-B1653 CPU board
 1 AR-B9425A-G SB Transfer (option)
 1 AR-B9425A-G Audio Cable (option)
 2 USB port on one bracket cable (option)
 1 Had disk adapter (44Pin) (option)
 1 PS/2 Mouse & Keyboard interface Y-Cable

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2. SETTING UP SYSTEM
This chapter describes how to install the AR-B1653. At first, the layout of AR-B1653 is shown, and the unpacking
information that you should be careful is described.
 Overview
 System Settings
2.1 AR-B1653 OVERVIEW
TOP PLACEMENT
BOTTOM PLACEMENT

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2.2 SYSTEM SETTINGS
Jumper pins allow you to set specific system parameters. Set them by changing the pin location of the jumper
blocks. (A jumper block is a small plastic-encased conductor that slips over the pins.) To change a jumper
setting, remove the jumper from its current location with your fingers or small needle-nosed pliers. Place the
jumper over the two pins designated for the desired setting. Press the jumper evenly onto the pins. Be careful
not to bend the pins.
We will show the locations of the AR-B1653 jumper pins, and the factory-default settings.
CAUTION: Do not touch any electronic components unless you are safely grounded. Wear a
grounded wrist strap or touch an exposed metal part of the system unit chassis. The static discharges
from your fingers can permanently damage electronic components.
2.2.1 Keyboard & Mouse Connector (KM2)
The KM2 is a 6-pin Mini DIN keyboard & Mouse connector. This keyboard & Mouse connector is PS/2 type
connector. This connector is also for a standard IBM-compatible keyboard when used with the included PS/2
keyboard & Mouse adapter cable.
2.2.2 SDRAM SOCKET 144 PIN (DIMM1)
It can assemble 16/32/64/128/256/512MB 144 pin DIMM Module Memory. When you set up 144-pin DIMM Module
Memory, AR-B1653 will auto-detect DRAM, and adopt correct save in order to make memory work till the best
situation.
Caution: Set up 144-pin DIMM Module Memory, please insert into slot vertical, if the direction is wrong and it leads
to failure, please confirm the direction is right.
DRAM Configuration (DIMM1)
11144
144 pin SO-DIMM

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2.2.3 Hard Disk (IDE) Connector (IDE1)
44 Pin Hard Disk Connector (IDE1)
The on-board 44-pin mini-pitched IDE interface is used to let user support either a 3.5" HDD with 44 to 40pin
adapter cable.
1 43
2 44
Pin Signal Pin Signal
1 -RESET 2 GROUND
3 DATA 7 4 DATA 8
5 DATA 6 6 DATA 9
7 DATA 5 8 DATA 10
9 DATA 4 10 DATA 11
11 DATA 3 12 DATA 12
13 DATA 2 14 DATA 13
15 DATA 1 16 DATA 14
17 DATA 0 18 DATA 15
19 GROUND 20 Not Used
21 IDEDREQ 22 GROUND
23 -IOW A 24 GROUND
25 -IOR A 26 GROUND
27 IDEIORDYA 28 GROUND
29 -DACKA 30 GROUND
31 AINT 32 Not Used
33 SA 1 34 Data33_66
35 SA 0 36 SA 2
37 CS 0 38 CS 1
39 HD LED A 40 GROUND
41 VCC 42 VCC
43 GROUND 44 Not Used
2.2.4 Parallel Port Connector (LPT1)
The connector for the parallel port is a 26-pin header connector.
1 25
2 26
Parallel Port Connector
DB-25 Signal DB-25 Signal
1 -Strobe 14 -Auto Form Feed
2 Data 0 15 -Error
3 Data 1 16 -Initialize
4 Data 2 17 -Printer Select In
5 Data 3 18 Ground
6 Data 4 19 Ground
7 Data 5 20 Ground
8 Data 6 21 Ground
9 Data 7 22 Ground
10 -Acknowledge 23 Ground
11 Busy 24 Ground
12 Paper 25 Ground
13 Printer Select 26 No Used

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2.2.5 CRT Connector (VGA1)
VGA1 is a standard 15-pin D-SUB connector commonly used for VGA.
2.2.6 USB Connector (USB1)
The Universal Serial Bus (USB) controller is USB V1.1 and Universal HCI V1.1 compliant. The Universal Serial
Bus (USB) standard is a low-to-medium speed interface for the connection of PC peripherals, which gives
complete Plug & Play, and hot attach/detach for up to 127 external devices.
USB is a leading edge technology that allows the user to quickly and easily add a wide range of peripheral devices
from printers to keyboards and telephony devices to fax/modems. Universal Host Controller Interface (UHCI) and
future support for the Open Host Controller Interface (OHCI) ensure USB compatibility and usability well into the
future.
The CPU board supports four Universal Serial Bus ports. An optional external port bracket attaches to the onboard
connector via an attached cable. With the optional port bracket installed you can attach USB devices to the
external ports. If the USB ports are installed, the USB Controller line in the Integrated Peripherals section of the
CMOS Setup utility must be set to “Enabled”. USB ports may also require Operating System support for USB
devices.
USB1 use an adapter cable to interface with external equipment.
2.2.7 LCD VOLTAGE SELECT (J1)

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2.2.8 EXTERNAL BUZZER (BZ1)
2.2.9 Serial Port (COM1, COM2)
 AR-B1653 is equipped with four serial ports. COM1 is a standard RS-232 interface.
 COM2/ use an adapter cable to interface with external equipment.
A. COM1
USEDRS232
COM1
9
8
7
6
5
4
3
21
B. COM2
USED RS232
2.2.10 Clear CMOS (JBAT1)

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2.2.11 GPIO Port (CN1)
2.2.12 Touch Screen Connector (TSC1)
TSC1 is a serial port, which is parallel with COM2. It provides another choice when user needs a serial port but
need to connect from board directly without connecting through a D-type connector. The typical application is a
touch screen panel.
2.2.13 26-Pin Audio Connector (AUDIO1)
Note: the connector does not contain the GAME (MIDI) port signal. When AR-B1653 audio card is used with
this CPU board, the GAME port function is not supported.

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2.2.14 LCD Inverter Connector (CN2)
2.2.15 LED (LED1)
2.2.16 Ethernet RJ-45 Connector (LAN1)
The system supports onboard network connectivity. To utilize this function, install the network driver from the
utility diskette, and connect the cable to the following RJ-45 header.
2.2.17 Reset Button (RST1)
SW
SW PUSHBUTTON
12
PIN Signal
1 +12V
2 +12v
3 GND
4 ENVEE
5 GND
6 GND
Power LED: External LED connector for Watchdog status indication.
LAN LED: External LED connector for 10/100M LAN
HDD LED (IDE1): External LED connector for primary IDE channel.

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2.2.18 Power Connector (PWR1)
The PWR1 is a 4-pin power connector. It’s the standard connector on all Acrosser boards.
2.2.19 PC/104 Connector (PC104)
(1) 64 Pin PC/104 Connector A&B
1
2
64
6
3
(2) 40 Pin PC/104 Connector C&D
1
240
39
Note:
If the content in setting is inconsistent with the CD-ROM, please refer to the setting as the priority.
2.2.20 Compact Flash Connector (CF1)
2.2.21 CF Master/Salver Connector (J4)

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2.2.22 18-bit LCD Panel Connector (JCD1)
2.2.23 Battery Connector (BT1)
3. WATCHDOG TIMER
This section describes the use of Watchdog Timer, including disable, enable, and trigger. AR-B1653 is equipped
with a programmable time-out period watchdog timer that occupies I/O port 443H. Users can use simple program to
enable the watchdog timer. Once you enable the watchdog timer, the program should trigger it every time before it
times out. Watchdog Timer will generate a response (system or IRQ) due to system fails to trigger or disable
watchdog timer before preset timer, times out.
Watchdog
Register
Time Base
Counter and
Compartor
RESET
Enable(D7)
Time Factor
(D0-D5)
Write and
Trigger
Watchdog Block Diagram

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3.1 WATCHDOG TIMER SETTING
The watchdog timer is a circuit that maybe be used from your program software to detect crash or hang up.
The Watchdog timer is automatically disabled after reset. Once you enabled the watchdog timer, your program
should trigger the watchdog timer every time before it times out. After you trigger the watchdog timer, the timer will
be set to zero and start to count again. If your program fails to trigger the watchdog timer before times out, it will
generate a reset pulse to reset the system or trigger the IRQ 9 signal in order to tell your system that the watchdog
time is out.
Please refer to the following table in order to properly program Watchdog function
D7 D6 D5 D4 D3 D2 D1 D0
1 Enable Reset
0 Disable IRQ 9
Timeperiod
Users could test watchdog function under ‘Debug’ program as follows:
C:>debug
 O 443 C8H
Generally, watchdog function would reset system after 8 seconds
 O 443 0H
Disable watchdog function
C:>debug
 O 443 88H
Generally, watchdog function would generate IRQ 9 after 8 seconds
 O 443 0H
Disable watchdog function
3.2 WATCHDOG TIMER TRIGGER
After you enable the watchdog timer, your program must write the same factor as triggering to the watchdog timer
at least once during every time-out period. You can change the time-out period by writing another timer factor to the
watchdog register at any time, and you must trigger the watchdog during every new time-out period in next trigger.
4. BIOS CONSOLE
This chapter describes the AR-B1653 BIOS menu displays and explains how to perform common tasks needed to
get up and running, and presents detailed explanations of the elements found in each of the BIOS menus. The
following topics are covered:
 BIOS Setup Overview
 Advanced CMOS Setup
 Peripheral Setup
 Boot
 BIOS Exit

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4.1 BIOS SETUP OVERVIEW
The BIOS is a program used to initialize and set up the I/O system of the computer, which includes the
ISA bus and connected devices such as the video display, diskette drive, and the keyboard.
The BIOS provides a menu-based interface to the console subsystem. The console subsystem
contains special software, called firmware that interacts directly with the hardware components and
facilitates interaction between the system hardware and the operating system.
The BIOS default values ensure that the system will function at its normal capability. In the worst
situation the user may have corrupted the original settings set by the manufacturer.
After the computer is turned on, the BIOS will perform diagnostics on the system and display the size of
the memory that is being tested. Press the [Del] key to enter the BIOS Setup program, and then the
main menu will show on the screen.
The BIOS Setup main menu includes some options. Use the [Up/Down] arrow key to highlight the
option that you wish to modify, and then press the [Enter] key to select the option and configure the
functions.
Setup Main Menu
The <Main> option allows you to record some basic system hardware configuration and set the system clock
and error handling. If the CPU board is already installed in a working system, you will not need to select this
option anymore.

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Date & Time Setup
Highlight the <Date> field and then press the [Page Up] /[Page Down] or [+]/[-] keys to set the current
date. Follow the month, day and year format.
Highlight the <Time> field and then press the [Page Up] /[Page Down] or [+]/[-] keys to set the current
date. Follow the hour, minute and second format.
The user can bypass the date and time prompts by creating an AUTOEXEC.BAT file. For information
on how to create this file, please refer to the MS-DOS manual.
Hard Disk Setup
The BIOS supports various types for user settings, The BIOS supports <Pri Master>, <Pri Slave>, <Sec
Master> and <Sec Slave> so the user can install up to two hard disks. For the master and slave
jumpers, please refer to the hard disk’s installation descriptions and the hard disk jumper settings in
section three of this manual.
4.2 ADVANCED
Standard CMOS Setup
Quick Power On Self Test [Enabled]
This field enables the power on test. Configuration options: [Enabled] [Disabled]
Full Screen Logo Show [Disable]
This allows you to enable or disable the full screen logo display feature.
Configuration options: [Disabled] [Enabled]

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USB Keyboard Support [Disable]
SUPPORT USB KEYBORD
Frame Buffer Size [16M]
4.3 PERIPHERALS
Peripherals
Onboard Serial Port 1 [AUTO]
Onboard Serial Port 2 [Auto]
Choose serial port 1 to 2 I/O address. Do not set port 1 to 2 to the same
address except for Disabled or Auto.

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UART 2 MODE [Standard]
Select an operating mode for the second serial port:
Normal RS-232C serial port
Standard RS-232C serial port
IrDA 1.0 Infrared port compliant with IrDA 1.0
specification
IrDA SIR IrDA-compliant serial infrared port
IrDA MIR 1 MB/sec infrared port
IrDA FIR Fast Infrared standard
FIR Fast Infrared standard
MIR 0.57M 0.57-MB/sec infrared port
MIR 1.15M 1.15-MB/sec infrared port
Sharp IR 4-Mb/s data transmission
HPSIR IrDA-compliant serial infrared port
ASK IR Amplitude shift keyed infrared port
Onboard Parallel Port [378H/IRQ7]
This field allows you to set the address of the onboard parallel port connector. If
you disable this field, the Parallel Port Mode and ECP DMA Select configurations
are not available. Configuration options: [Disabled] [378H/IRQ7] [278H/IRQ5]
Onboard Parallel Mode [Normal]
This field allows you to set the operation mode of the parallel port. [Normal] allows
normal-speed operation but in one direction only; [EPP] allows bidirectional parallel
port operation; [ECP] allows the parallel port to operate in bidirectional DMA mode;
[ECP+EPP] allows normal speed operation in a two-way mode. Configuration
options: [Normal] [EPP] [ECP] [ECP+EPP]
ECP Mode use DMA [3]
This field allows you to configure the parallel port DMA channel for the selected
ECP mode. This selection is available only if you select [ECP] or [ECP+EPP] in
Parallel Port Mode above. Configuration options: [1] [3]
Parallel port EPP Type [EPP1.9]
The mode depends on your external device that connects to this port.
Onboard FDD controller [Enables]
Use the on-board floppy controller
OnChip USB controller [Enables]
This should be enabled if your system has a USB installed on the system board and you want to use
it. Even when so equipped, if you add a higher performance controller, you will need to disable
this feature.