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Table of Contents
Related Manuals for MSI 848PM
Summary of Contents for MSI 848PM
- Page 1 865GM3/865GVM2/865PEM3/848PM MS-7037 (v1.X) M-ATX Mainboard G52-M7037X3...
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Page 2: Fcc-B Radio Frequency Interference Statement
Manual Rev: 1.2 Release Date: July 2004 FCC-B Radio Frequency Interference Statement This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. -
Page 3: Copyright Notice
Copyright Notice The material in this document is the intellectual property of MICRO-STAR INTERNATIONAL. We take every care in the preparation of this document, but no guarantee is given as to the correctness of its contents. Our products are under continual improvement and we reserve the right to make changes without notice. -
Page 4: Technical Support
Alternatively, please try the following help resources for further guidance. Visit the MSI homepage & FAQ site for technical guide, BIOS updates, driver updates, and other information: http://www.msi.com.tw & http://www.msi. -
Page 5: Table Of Contents
FCC-B Radio Frequency Interference Statement ... ii Copyright Notice ... iii Revision History ... iii Technical Support ... iv Safety Instructions ... iv Chapter 1. Getting Started ... 1-1 Mainboard Specifications ... 1-2 Mainboard Layout ... 1-4 Chapter 2. Hardware Setup ... 2-1 Quick Components Guide ... - Page 6 CD-In Connector: JCD1 ... 2-16 SPDIF-Out Connector: JSP1 ... 2-16 Front USB Connectors: JUSB1 / JUSB2 ... 2-16 Front Panel Connectors: JFP1 & JFP2 ... 2-17 Serial ATA Connectors controlled by ICH5: SATA1, SATA2 ... 2-18 Front Panel Audio Connector: JAUD1 ... 2-19 Joystick/Game Connector: JGP1 (Optional) ...
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Page 7: Chapter 1. Getting Started
ICH5 chipsets for optimal system efficiency. Designed to fit the ® advanced Intel Pentium 4 processor in the 478-pin package, 865GM3 ® / 865GVM2 / 865PEM3 / 848PM delivers a high performance and pro- fessional desktop platform solution. 1 - 1... -
Page 8: Mainboard Specifications
MS-7037 M-ATX Mainboard Mainboard Specifications Supports Socket 478 for Intel Supports 533MHz or 800MHz FSB Supports 3.4GHz or higher speed P4 processor (Require multi-directional CPU heatsink) (For the latest information about CPU, please visit http://www.msi.com.tw/program/ products/mainboard/mbd/pro_mbd_cpu_support.php) Chipsets Intel ® 865G/865GV/865PE/848P chipset... - Page 9 - Integrated Fast Ethernet MAC and PHY in one chip - Supports 10/100Mb/s (for 8100C) and 10/100/1000Mb/s (for 8110S / 8100SB) auto-negotiation operation - Compliant with PCI v2.2, and LAN on Motherboard (LOM) standard On-Board 1394 (Optional) VIA VT6307/6306 BIOS The mainboard BIOS provides “Plug &...
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Page 10: Mainboard Layout
MS-7037 M-ATX Mainboard Mainboard Layout T: mou se B: keyboard JPW1 Line-In Line-Out B:Mic PCI Slot 1 8100C/8110S/ 8110SB PCI Slot 2 CD_IN1 PCI Slot 3 Codec JSP1 JAUD1 MS-7037 v1.X M-ATX Mainboard (MS-7037 v1.X is for Intel 865PE/G/GV chipset) 1 - 4 CPU_FAN JCI1... -
Page 11: Getting Started
T: mouse B: keyboard JPW1 Line-In Line-Out JLAN_LED1 B:Mic AGP Slot PCI Slot 1 Realtek 8100C/8110S/ 8110SB PCI Slot 2 CD_IN1 PCI Slot 3 Codec JSP1 JAUD1 J1394_1 (Optional) MS-7037 v2.X M-ATX Mainboard (MS-7037 v2.X is for Intel 848P chipset) Getting Started COM2 (Optional) CPU_FAN... -
Page 12: Chapter 2. Hardware Setup
Chapter 2. Hardware Setup Hardware Setup This chapter tells you how to install the CPU, memory modules, and expansion cards, as well as how to setup the jumpers on the mainboard. Also, it provides the instructions on connecting the peripheral devices, such as the mouse, keyboard, etc. -
Page 13: Quick Components Guide
MS-7037 M-ATX Mainboard Quick Components Guide JPW1, p.2-8 Back Panel I/O, p.2-9 AGP slot, p.2-22 PCI slots, p.2-22 JCD1, p.2-16 JSP1, p.2-16 JAUD1, p.2-19 2 - 2 SYS_FAN1, p.2-14 CPU_FAN1, p.2-14 DDR DIMMs, p.2-6 CPU, p.2-3 J1394_1, J1394_2, JUSB1, JUSB2, p.2-20 p.2-16 (optional) -
Page 14: Central Processing Unit: Cpu
For the latest information about CPU, please visit http://www.msi.com.tw/ program/products/mainboard/mbd/pro_mbd_cpu_support.php Example of CPU Core Speed Derivation Procedure... -
Page 15: Cpu Installation Procedures For Socket 478
MS-7037 M-ATX Mainboard CPU Installation Procedures for Socket 478 Please turn off the power and unplug the power cord before installing the CPU. Pull the lever sideways away from the socket. Make sure to raise the lever up to a 90-de- gree angle. -
Page 16: Installing The Cpu Fan
4. Press the two levers down to fasten the fan. Each lever can be pressed down in only ONE direction. levers MSI Reminds You... If your Intel Pentium 4 proces- sor supports 3.0GHz (and up), please be sure to use a... -
Page 17: Memory
The mainboard provides 2 slots for 184-pin DDR SDRAM DIMM (Double In- Line Memory Module) modules and supports the memory size up to 1GB. You can install DDR400/DDR333/DDR266 modules on the DDR DIMM slots (DDR 1~2). For the updated supporting memory modules, please visit http://www.msi. com.tw/program/products/mainboard/mbd/pro_mbd_trp_list.php. Introduction to DDR SDRAM DDR (Double Data Rate) SDRAM is similar to conventional SDRAM, but doubles the rate by transferring data twice per cycle. -
Page 18: Ddr Population Rules
The plastic clip at each side of the DIMM slot will automatically close. MSI Reminds You... You can barely see the golden finger if the module is properly inserted in the socket. -
Page 19: Power Supply
ATX 12V Power Connector: JPW1 This 12V power connector is used to provide power to the CPU. JPW1 JPW1 Pin Definition SIGNAL MSI Reminds You... Power supply of 300 (and up) watt is highly recommended for system stability. 2 - 8 Power Supply... -
Page 20: Back Panel
The back panel provides the following connectors: (1) MS-7037 v1.X Rear I/O Parallel Mouse COM 1 Keyboard (2) MS-7037 v2.X Rear I/O Parallel Mouse COM 1 Keyboard Mouse Connector The mainboard provides a standard PS/2 taching a PS/2 ® mouse. You can plug a PS/2 Keyboard Connector The mainboard provides a standard PS/2 attaching a PS/2... -
Page 21: Lan Jack: 10/100 Lan (8100C)
MS-7037 M-ATX Mainboard RJ-45 LAN Jack: 10/100 LAN (8100C) / Giga-bit LAN (8110S/SB) (Optional) The mainboard provides two standard RJ-45 jacks for connection to Local Area Network (LAN). Giga-bit LAN enables data to be transferred at 1000, 100 or 10Mbps. You can connect a network cable to either LAN jack. Activity Indicator Color LED State... -
Page 22: Ieee1394 Port (Optional)
IEEE1394 Port (Optional) The mainboard provides one standard IEEE1394 port. The standard IEEE1394 port connects to IEEE1394 devices without external power. The IEEE1394 high-speed serial bus complements USB by providing enhanced PC connectivity for a wide range of devices, including consumer electronics audio/ video (A/V) appliances, storage peripherals, other PCs, and portable devices. -
Page 23: Usb Connectors
MS-7037 M-ATX Mainboard USB Connectors The mainboard provides a UHCI (Universal Host Controller Interface) Universal Serial Bus root for attaching USB devices such as keyboard, mouse or other USB- compatible devices. You can plug the USB device directly into the connector. USB Ports Serial Port Connector: COM 1 &... -
Page 24: Parallel Port Connector: Lpt1
Parallel Port Connector: LPT1 The mainboard provides a 25-pin female centronic connector as LPT. A parallel port is a standard printer port that supports Enhanced Parallel Port (EPP) and Extended Capabilities Parallel Port (ECP) mode. Pin Definition SIGNAL DESCRIPTION STROBE Strobe DATA0 Data0... -
Page 25: Connectors
SENSOR +12V SYS_FAN MSI Reminds You... 1. Always consult the vendors for proper CPU cooling fan. 2. Please refer to the recommended CPU fans at Intel 3. If you want to overclock the CPU, it is strongly recommended to use a multi-direction fan for better heatsink. -
Page 26: Hard Disk Connectors: Ide1 & Ide2
IDE2 (Secondary IDE Connector) IDE2 can also connect a Master and a Slave drive. MSI Reminds You... If you install two hard disks on cable, you must configure the second drive to Slave mode by setting its jumper. Refer to the hard disk documentation supplied by hard disk vendors for jumper setting instructions. -
Page 27: Cd-In Connector: Jcd1
MS-7037 M-ATX Mainboard CD-In Connector: JCD1 The connector is for CD-ROM audio connector. SPDIF-Out Connector: JSP1 This connector is used to connect SPDIF (Sony & Philips Digital Interconnect Format) interface for digital audio transmission. JCD1 Connected to JSP1 Front USB Connectors: JUSB1 / JUSB2 The mainboard provides two standard USB 2.0 pin headers JUSB1 / JUSB2. -
Page 28: Front Panel Connectors: Jfp1 & Jfp2
Front Panel Connectors: JFP1 & JFP2 The mainboard provides two front panel connectors for electrical connection to the front panel switches and LEDs. JFP1 is compliant with Intel Connectivity Design Guide. Power Speaker JFP2 SIGNAL HD_LED_P FP PWR/SLP HD_LED_N FP PWR/SLP RST_SW_N PWR_SW_P RST_SW_P... -
Page 29: Serial Ata Connectors Controlled By Ich5: Sata1, Sata2
SATA2 SATA1 Serial ATA cable Connect to serial ATA ports MSI Reminds You... Please do not fold the serial ATA cable in a 90-degree angle, which will cause the loss of data during the transmission. 2-18 SATA1 & SATA2 Pin Definition... -
Page 30: Front Panel Audio Connector: Jaud1
HP_ON AUD_FPOUT_L AUD_RET_L MSI Reminds You... If you don’t want to connect to the front audio header, pins 5 & 6, 9 & 10 have to be jumpered in order to have signal output directed to the rear audio ports. Otherwise, the Line-Out connector on the back panel will not function. -
Page 31: Ieee 1394 Connector: J1394_1/J1394_2 (Optional)
MS-7037 M-ATX Mainboard IEEE 1394 Connector: J1394_1/J1394_2 (Optional) The mainboard provides two 1394 pin headers that allow you to connect optional IEEE 1394 port. J1394_1 / J1394_2 How to attach the IEEE 1394 Port: Connected to J1394_1 / J1394_2 Foolproof design 2-20 Pin Definition... -
Page 32: Jumpers
The motherboard provides the following jumpers for you to set the computer’s function. This section will explain how to change your motherboard’s function through the use of jumpers. Clear CMOS Jumper: JBAT1 There is a CMOS RAM on board that has a power supply from external battery to keep the data of system configuration. -
Page 33: Agp (Accelerated Graphics Port) Slot
MS-7037 M-ATX Mainboard The motherboard provides one AGP slot and three 32-bit PCI bus slots. AGP (Accelerated Graphics Port) Slot The AGP slot allows you to insert the AGP graphics card. AGP is an interface specification designed for the throughput demands of 3D graphics. It introduces a 66MHz, 32-bit channel for the graphics controller to directly access main memory. -
Page 34: Chapter 3. Bios Setup
An error message appears on the screen during the system booting up, and requests you to run SETUP. You want to change the default settings for customized features. MSI Reminds You... 1. The items under each BIOS category described in this chapter are under continuous update for better system performance. -
Page 35: Entering Setup
MS-7037 M-ATX Mainboard Power on the computer and the system will start POST (Power On Self Test) process. When the message below appears on the screen, press <DEL> key to enter Setup. P r e s s If the message disappears before you respond and you still wish to enter Setup, restart the system by turning it OFF and On or pressing the RESET button. -
Page 36: The Main Menu
BIOS Setup The Main Menu Once you enter Phoenix-Award BIOS CMOS Setup Utility, the Main Menu will ® appear on the screen. The Main Menu allows you to select from twelve setup func- tions and two exit choices. Use arrow keys to select among the items and press <Enter>... - Page 37 MS-7037 M-ATX Mainboard Load High Performance Defaults Use this menu to load the BIOS values for the best system performance, but the system stability may be affected. Load BIOS Setup Defaults Use this menu to load factory default settings into the BIOS for stable system perfor- mance operations.
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Page 38: Standard Cmos Features
Standard CMOS Features The items in Standard CMOS Features Menu includes some basic setup items. Use the arrow keys to highlight the item and then use the <PgUp> or <PgDn> keys to select the value you want in each item. Date This allows you to set the system to the date that you want (usually the current date). - Page 39 MS-7037 M-ATX Mainboard Drive A: This item allows you to set the type of floppy drives installed. Available options: [None], [360K, 5.25 in.], [1.2M, 5.25 in.], [720K, 3.5 in.], [1.44M, 3.5 in.], [2.88M, 3.5 in.]. Video The setting controls the type of video adapter used for the primary monitor of the system.
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Page 40: Advanced Bios Features
BIOS Setup Advanced BIOS Features Removable Device Priority Press <Enter> to enter the sub-menu. Then you may use the arrow keys ( -Ż ) to select the desired device, then press <+>, <-> or <PageUp>, <PageDown> key to move it up/down in this removable device priority list. Hard Disk Boot Priority Press <Enter>... - Page 41 MS-7037 M-ATX Mainboard MSI Reminds You... Enabling the functionality of Hyper-Threading Technology for your computer system requires ALL of the following platform Components: * CPU: An Intel * Chipset: An Intel * BIOS: A BIOS that supports HT Technology and has it enabled;...
- Page 42 Gate A20 Option This item is to set the Gate A20 status. A20 refers to the first 64KB of extended memory. When the default value [Fast] is selected, the Gate A20 is controlled by Port92 or chipset specific method resulting in faster system performance. When [Normal] is selected, A20 is controlled by a keyboard controller or chipset hardware.
- Page 43 MS-7037 M-ATX Mainboard Hard Disk S.M.A.R.T. This allows you to activate the S.M.A.R.T. (Self-Monitoring Analysis & Reporting Technology) capability for the hard disks. S.M.A.R.T is a utility that monitors your disk status to predict hard disk failure. This gives you an opportunity to move data from a hard disk that is going to fail to a safe place before the hard disk becomes offline.
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Page 44: Advanced Chipset Features
Advanced Chipset Features MSI Reminds You... Change these settings only if you are familiar with the chipset. DRAM Timing Selectable Selects whether DRAM timing is controlled by the SPD (Serial Presence Detect) EEPROM on the DRAM module. Setting to [By SPD] enables the following fields auto- matically to be determined by BIOS based on the configurations on the SPD. - Page 45 MS-7037 M-ATX Mainboard Memory Frequency For Use this item to configure the clock frequency of the installed DRAMs. Setting options: [Auto], [DDR266], [DDR333], [DDR320], [DDR400]. System BIOS Cacheable Selecting [Enabled] allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result.
- Page 46 BIOS Setup On-Chip Frame Buffer Size Frame Buffer is the video memory that stores data for video display (frame). This field is used to determine the memory size for Frame Buffer. Larger frame buffer size increases video performance. Settings: [1MB], [8MB], [16MB]. Boot Display Use the field to select the type of device you want to use as the display(s) of the system.
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Page 47: Integrated Peripherals
MS-7037 M-ATX Mainboard Integrated Peripherals OnChip IDE Device Press <Enter> to enter the sub-menu and the following screen appears: IDE HDD Block Mode Block mode is also called block transfer, multiple commands, or multiple sector read/write. If your IDE hard drive supports block mode (most new drives do), select [Enabled] for automatic detection of the optimal number of block read/ writes per sector the drive can support. - Page 48 mode, the system automatically determines the best mode for each device. The settings are: [Auto], [Mode 0], [Mode 1], [Mode 2], [Mode 3], [Mode 4]. IDE Primary/Secondary Master/Slave UDMA Ultra DMA/33 implementation is possible only if your IDE hard drive supports it and the operating environment includes a DMA driver (Windows 95 OSR2 or a third-party IDE bus master driver).
- Page 49 MS-7037 M-ATX Mainboard USB Controller Select [Enabled] if your system contains a Universal Serial Bus (USB) controller and you have USB peripherals. USB 2.0 Controller Set to [Enabled] if you need to use any USB 2.0 device in the operating system that does not support or have any USB 2.0 driver installed, such as DOS and SCO Unix.
- Page 50 KB Power ON Function If POWER ON Function is set to [Password], then you can set a password in the field for the PS/2 keyboard to power on the system. Hot Key Power ON If POWER ON Function is set to [Hot KEY], you can assign a hot key combina- tion in the filed for the PS/2 keyboard to power on the system.
- Page 51 MS-7037 M-ATX Mainboard ECP Mode Use DMA The ECP mode has to use the DMA channel, so choose the onboard parallel port with the ECP feature. After selecting it, the following message will appear: “ECP Mode Use DMA.” At this time, the user can choose between DMA channel [3] or [1].
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Page 52: Power Management Setup
Power Management Setup MSI Reminds You... S3-related functions described in this section are available only when your BIOS supports S3 sleep mode. Sleep State This item specifies the power saving modes for ACPI function. If your operating system supports ACPI, such as Windows 98SE, Windows ME and Windows 2000, you can choose to enter the Standby mode in S1(POS) or S3(STR) fashion through the setting of this field. - Page 53 MS-7037 M-ATX Mainboard Power Management This item is used to select the degree (or type) of power saving and is related to the HDD Power Down item. There are three options for power management: [Min Saving] Minimum Power Management. Suspend Mode=1 Hour [Max Saving] Maximum Power Management.
- Page 54 These fields specify whether the system will be awakened from power saving modes when activity or input signal of the specified hardware peripheral or compo- nent is detected. Options: [Enabled], [Disabled]. MSI Reminds You... You need to install a modem card supporting power on function for “Wake Up On Ring” function.
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Page 55: Pnp/Pci Configurations
MS-7037 M-ATX Mainboard PNP/PCI Configurations This section describes configuring the PCI bus system and PnP (Plug & Play) feature. PCI, or Peripheral Component Interconnect, is a system which allows I/O devices to operate at speeds nearing the speed the CPU itself uses when communi- cating with its special components. - Page 56 [Reserved] The IRQ will be reserved for further request. MSI Reminds You... IRQ (Interrupt Request) lines are system resources allocated to I/O devices. When an I/O device needs to gain attention of the operating system, it signals this by causing an IRQ to occur. After receiving the signal, when the operating system is ready, the system will interrupt itself and perform the service required by the I/O device.
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Page 57: Pc Health Status
MS-7037 M-ATX Mainboard PC Health Status This section shows the status of your CPU, fan, overall system status, etc. Monitor function is available only if there is hardware monitoring mechanism onboard. Chassis Intrusion Detect The field enables or disables the feature of recording the chassis intrusion status and issuing a warning message if the chassis is once opened. - Page 58 BIOS Setup CPU Temp. Tolerance ( You can select a fan tolerance value here for the specific range for the CPU smart Fan Temperature item. If the current temperatures of the 2 fans reach to the maximum threshold (the temperatures set in the CPU smart Fan Temperature plus the tolerance values you set here), the fans will speed up for cooling down.
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Page 59: Frequency/Voltage Control
[Enabled], [Disabled]. Spread Spectrum When the motherboard’s clock generator pulses, the extreme values (spikes) of the pulses creates EMI (Electromagnetic Interference). The Spread Spectrum function reduces the EMI generated by modulating the pulses so that the spikes of the pulses are reduced to flatter curves. -
Page 60: Load High Performance/Bios Setup Defaults
Pressing ‘Enter’ loads the default BIOS values that enable the best system performance but may lead to a stability issue. MSI Reminds You... The option is for power or overclocking users only. Use of high performance defaults will tighten most timings to increase the system performance. -
Page 61: Set Supervisor/User Password
Security Option is set to System, the password is required both at boot and at entry to Setup. If set to Setup, password prompt only occurs when you try to enter Setup. MSI Reminds You... About Supervisor Password & User Password:... -
Page 62: Appendix A: Using 2-, 4- & 6-Channel Audio Function
Using 2-, 4- & 6-Channel Audio Function Appendix A: Using 2-, 4- & 6-Channel Audio Function The mainboard is equipped with Realtek ALC655 chip, which provides sup- port for 6-channel audio output, including 2 Front, 2 Rear, 1 Center and 1 Subwoofer channel. -
Page 63: Installing The Audio Driver
1. Insert the companion CD into the CD-ROM drive. The setup screen will automatically appear. 2. Click Realtek AC97 Audio Drivers. MSI Reminds You... The AC97 Audio Configuration continuous update to enhance audio applications. Hence, the program screens shown here in this appendix may be slightly different from the latest software utility and shall be held for reference only. - Page 64 3. Click Next to install the AC’97 Audio software. 4. Click Finish to restart the system. Using 2-, 4- & 6-Channel Audio Function Click here Click here Select this option A - 3...
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Page 65: Software Configuration
MS-7037 M-ATX Mainboard Software Configuration After installing the audio driver, you are able to use the 4-/6-channel audio feature now. Click the audio icon of the screen to activate the AC97 Audio Configuration. Sound Effect Here you can select a sound effect you like from the Environment list. You may also edit the properties for an environment as you wish by clicking the Edit button, then just scroll the bar in the bottom for each property to adjust. - Page 66 Here it provides the Karaoke function which will automatically remove human voice (lyrics) and leave melody for you to sing the song. Note that this function applies only for 2-channel audio operation. Just check the Voice Cancellation box and then click OK to activate the Karaoke function.
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Page 67: Equalizer
MS-7037 M-ATX Mainboard Equalizer Here you regulate each equalizer for current playing digital sound sources. You may choose the provided sound effects, and the equalizer will adjust automatically. If you like, you may also load an equalizer setting or make an new equalizer setting to save as an new one by using the buttons Load and Save. -
Page 68: Speaker Configuration
Speaker Configuration In this tab, you can easily configure your multi-channel audio function and speakers. Select Synchronize the phonejack switch with the settings. Select a desired multi-channel operation from No. of Speakers. Headphone 2-Channel Mode for Stereo-Speaker Output 4-Channel Mode for 4-Speaker Output 6-Channel Mode for 5.1-Speaker Output Click OK to close this window. -
Page 69: Speaker Test
MS-7037 M-ATX Mainboard Speaker Test You can use this tab to test each connected speaker to ensure if 4- or 6- channel audio operation works properly. If any speaker fails to make sound, then check whether the cable is inserted firmly to the connector or replace the bad speakers with good ones. -
Page 70: Hrtf Demo
MSI Reminds You... 1. 6 speakers appear on the “Speaker Test” tab only when you select “6-Channel Mode” in the “Number of Speakers” column in “Speaker Configuration” tab. If you select “4-Channel Mode”, only 4 speakers appear on the window. -
Page 71: General
MS-7037 M-ATX Mainboard General In this tab it provides some information about the AC97 Audio Configuration utility, including Audio Driver Version, DirectX Version, Audio Controller & AC97 Codec. You may also select the language of this utility by choosing from the Language list. A - 1 0... -
Page 72: Using 2-, 4- & 6- Channel Audio Function
Using 2-, 4- & 6- Channel Audio Function Connecting the Speakers When you have set the Multi-Channel Audio Function mode properly in the software utility, connect your speakers to the correct phone jacks in accord- ance with the setting in software utility. 2-Channel Mode for Stereo-Speaker Output Refer to the following diagram and caption for the function of each phone jack on the back panel when 2-Channel Mode is selected. - Page 73 MS-7037 M-ATX Mainboard 4-Channel Mode for 4-Speaker Output The audio jacks on the back panel always provide 2-channel analog audio output function, however these audio jacks can be transformed to 4- or 6- channel analog audio jacks by selecting the corresponding multi-channel operation from No.
- Page 74 Out function when 6-Channel Mode for 6-Speaker Output is selected. MSI Reminds You... If the audio signals coming from the Center and Subwoofer speaker are swapped when you play video or music on the computer, a con- verter may be required to exchange center and subwoofer audio signals.