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Table of Contents
Related Manuals for MSI Fuzzy 945GM2
Summary of Contents for MSI Fuzzy 945GM2
- Page 1 Fuzzy 945GM2/945GME2 MS-9642 (V1.X) Mainboard G52-96421X2...
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Page 2: Trademarks
If a problem arises with your system and no solution can be obtained from the user’s manual, please contact your place of purchase or local distributor. Alternatively, please try the following help resources for further guidance. Visit th e MSI web site at http://global.msi.com.tw/index.php? func=faqIndex for FAQ, technical guide, BIOS updates, driver updates, and other information. -
Page 3: Safety Instructions
Safety Instructions Always read the safety instructions carefully. Keep this User’s Manual for future reference. Keep this equipment away from humidity. Lay this equipment on a reliable flat surface before setting it up. The openings on the enclosure are for air convection hence protects the equip- ment from overheating. -
Page 4: Fcc-B Radio Frequency Interference Statement
FCC-B Radio Frequency Interference Statement Th is eq u ip men t h as 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 in a residential installation. -
Page 5: Weee (Waste Electrical And Electronic Equipment) Statement
WEEE (Waste Electrical and Electronic Equipment) Statement... -
Page 8: Table Of Contents
CONTENTS Copyright Notice ..................... ii Trademarks ......................ii Revision History ..................... ii Technical Support ....................ii Safety Instructions ....................iii FCC-B Radio Frequency Interference Statement ........... iv WEEE (Waste Electrical and Electronic Equipment) Statement ........ v Chapter 1 Getting Started ................1-1 Mainboard Specifications ................ -
Page 9: Chapter 1 Getting Started
Getting Started Chapter 1 Getting Started Thank you for choosing the Fuzzy 945GM2/945GME2 (MS-9642 v1.X) Mini ITX mainboard from MSI. ® Based on the innovative Intel 945GM/945GME & ICH7M controllers for optimal system efficiency, the Fuzzy 945GM2/945GME2 accommodates the latest ®... -
Page 10: Mainboard Specifications
MS-9642 Mainboard Mainboard Specifications Processor ® - Intel Co re 2 Duo/Co re Duo /Core Solo/Celero n M/Celeron LV 423 BGA (with BGA Passive Cooler) CPU in Socket M - Supports 3 pin CPU Fan Pin-Header with Fan Speed Control - Supports Intel Dual Core Technology to 533/667MHz and up Chipset ®... - Page 11 Getting Started Connectors Back Panel - 3 RJ-45 LAN jacks - 2 USB 2.0 ports - 1 D-Sub VGA connector - 1 serial port - 1 PS2 keyboard/mouse port - 1 Line-In/Line-Out/Mic-In stacked audio jack Onboard Pinheaders - 1 USB 2.0 pinheader (2 ports) - 1 parallel port pinheader - 1 f ront audio pinheader - 1 LVDS connector...
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Page 12: Block Diagram
MS-9642 Mainboard Block Diagram... -
Page 13: Mainboard Layout
Int el 82573 L LAN Ja cks Gb LA N T: Lin e-In M: Line-Ou t B: Mic -In DIMM1 PCI-E1 JCI1 BIOS SYSFAN1 PCI1 JAUD1 PCI2 JCOMP 5 JA MP1 JC OMP4 Fuzzy 945GM2/945GME2 (MS-9642 v1.X) Mini ITX Mainboard... -
Page 14: Board Dimension
MS-9642 Mainboard Board Dimension... -
Page 15: Back Panel & I/O Shield Drawing
Getting Started Back Panel & I/O Shield Drawing... -
Page 16: Power Consumption
MS-9642 Mainboard Power Consumption Component Description Motherboard MS-9642 Intel Core 2 T7200 Memory DDR2 1GB HITACHI 20G 1.8" Operating system Windows XP Professional SP2 3.3V -12V 5Vsb Power (W ) 3D Maker 2006 2.17 2.77 0.71 0.054 0.066 43.211 CPU Stress 2.35 2.32 0.68... -
Page 17: Safety Compliance & Mtbf
Getting Started Safety Compliance & MTBF Standard number Certification Title of standard EN 55022:1998+A1:2000+A2:2003 Class B Product family standard Limits for harmonic current EN 6100-3-2:2000 Class D emission Limitation of voltage EN 6100-3-3:1995+A1:2001 fluctuation and flicker in low- voltage supply system Immunity EN 55024:1998+A1:2001+A2:2003 Product family standard BSMI... - Page 18 MS-9642 Mainboard 1-10...
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Page 19: Chapter 2 Hardware Setup
Hardware Setup Chapter 2 Hardware Setup This chapter provides you with the information about hardware setup procedures. While doing the installation, be careful in holding the components and follow the installation procedures. For some components, if you install in the wrong orientation, the components will not work properly. -
Page 20: Quick Components Guide
MS-9642 Mainboard Quick Components Guide JLPT1, p.2-15 ATX1, p.2-7 F_USB2, p.2-14 IDE1, CPU, p.2-3 p.2-9 SATA1/2, p.2-10 CPUFAN1, p.2-12 JFP1, p.2-12 Back Panel I/O, p.2-8 J1, p.2-17 CLR_CMOS1, p.2-17 JLVDS1, p.2-16 DDRII DIMM, p.2-6 JCI1,p.2-9 PCI-E Slot, BIOS p.2-18 SYSFAN1, J3, p.2-15 p.2-12 J2, p.2-13... -
Page 21: Cpu (Central Processing Unit)
Hardware Setup CPU (Central Processing Unit) ® The mainboard supports Intel Core 2 Duo/ Core Duo/ Core Solo/ Celeron M/ Celeron LV 423 BGA (with BGA Passive Cooler) processors in Socket M. When you are installing the CPU, make sure the CPU has a heat sink and a cooling fan attached on the top to prevent overheating. - Page 22 MS-9642 Mainboard CPU & Cooler Set Installation 1. Place the CPU on top of the socket. Make sure to align the gold arrow on the CPU with the arrow key on the socket. 2. Push the CPU down until its pins securely fit into the socket. 3.
- Page 23 Hardware Setup 5. Mount the cooler set (fan & heatsink bundled) on top of the CPU and fit it into the retention mechanism. 7. Connect the fan power cable from the 6. Secure the metal clips back to the mounted fan to the 3-pin fan power con- retention mechanism.
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Page 24: Memory
MS-9642 Mainboard Memory The DIMM slots are intended for system memory modules. DDR2 240-pin, 1.8V 64x2=128 pin 56x2=112 pin Installing Memory Modules 1. The memory module has only one notch on the center and will only fit in the right orientation. -
Page 25: Power Supply
Hardware Setup Power Supply ATX 20-Pin System Power Connector: ATX1 This connector allows you to connect to an ATX power supply. To connect to the ATX power supply, make sure the plug of the power supply is inserted in the proper orientation and the pins are aligned. -
Page 26: Back Panel
MS-9642 Mainboard Back Panel Serial Port LAN Port M ouse Line-In Line-Out Mic-In VGA Port Keyboard USB Ports LAN Ports Serial Port Connector The serial port is a 16550A high speed communications port that sends/ receives 16 bytes FIFOs. You can attach a serial mouse or other serial devices directly to the connector. -
Page 27: Connectors
Hardware Setup Connectors Chassis Intrusion Connector: JCI1 This connector connects to the chassis intrusion switch cable. If the chassis is opened, the chassis intrusion mechanism will be activated. The system will record this status and show a warning message on the screen. To clear the warning, you must enter the BIOS utility and clear the record. - Page 28 MS-9642 Mainboard Serial ATA Connectors: SATA1, SATA2 SATA1~SATA2 are high-speed SATA interface ports and support SATA data rates of 150MB/s. Each SATA connector can connect to 1 hard disk device and is fully com- pliant with Serial ATA 1.0 specifications. SATA1 SATA2 Important...
- Page 29 Hardware Setup Audio Amplifier Connector: JAMP1 The JAMP1 is used to connect audio amplifiers to enhance audio performance. Pin Definition JAMP1 SIGNAL AMP_L- AMP_L+ AMP_R- AMP_R+ Front Audio Connector: JAUD1 The JAUD1 connects to an optional audio bracket that provides extra front panel audio IO jacks.
- Page 30 MS-9642 Mainboard Fan Power Connectors: CPUFAN1, SYSFAN1 The fan power connectors support system cooling fan with +12V. When connecting the wire to the connectors, always take note that the red wire is the positive and should be connected to the +12V, the black wire is Ground and should be connected to GND.
- Page 31 Hardware Setup Serial Port Connector: J2 The J2 is a RS232/422/485 COM port pinheader that connects to serial devices. RS232 RS422 RS485 COM2 COM3 COM4 COM5 V = supported X = not supported Serial Port Bracket (Optional) Connect to J2 J2 Pin Definition Voltage Select Serial Port Serial Port...
- Page 32 MS-9642 Mainboard Front USB Connector: F_USB2 The mainboard provides one USB 2.0 pinheader (optional USB 2.0 bracket available) ® that is compliant with Intel I/O Connectivity Design Guide. USB 2.0 technology in- creases data transfer rate up to a maximum throughput of 480Mbps, which is 40 times faster than USB 1.1, and is ideal for connecting high-speed USB interface peripherals such as USB HDD, digital cameras, MP3 players, printers, mo- dems and the like.
- Page 33 Hardware Setup Digital IO Connector: J3 The J3 connects to the General-Purpose Input/Output (GPIO) peripheral module. J3 Pin Definition SIGNAL SIGNAL VCC3 VCC5 N_GPIO10 N_GPIO20 N_GPIO11 N_GPIO21 N_GPIO12 N_GPIO22 N_GPIO13 N_GPIO23 N_GPIO14 N_GPIO24 N_GPIO15 N_GPIO25 N_GPIO16 N_GPIO26 N_GPIO17 N_GPIO27 Parallel Port Header: JLPT1 The mainboard provides a 26-pin header for connection to an optional parallel port bracket.
- Page 34 MS-9642 Mainboard LVDS Flat Panel Connector: JLVDS1 The LVDS (Low Voltage Differential Signal) connector provides a digital interface typically used with flat panels. After connecting an LVDS interfaced flat panel to the JLVDS1, be sure to check the panel datasheet and set the J1 LVDS Power Selection Jumper to a proper voltage.
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Page 35: Jumpers
Hardware Setup Jumpers LVDS Power Selection Jumper: J1 Use this jumper to specify the LVDS power. Signal Name VCC3 LCD_SRC (default VCC3) VCC5 COM Port Power Jumpers: JCOMP4, JCOMP5 These jumpers specify the operation voltage of the serial port COM4 & COM5. JCOMP4 +12V JCOMP5... -
Page 36: Slots
MS-9642 Mainboard Slots PCI (Peripheral Component Interconnect) Express Slot PCI Express architecture provides a high performance I/O infrastructure for Desktop Platforms with transfer rates starting at 2.5 Giga transfers per second over a PCI Express x1 lane for Gigabit Ethernet, TV Tuners, 1394 controllers, and general pur- pose I/O. -
Page 37: Chapter 3 Bios Setup
BIOS Setup Chapter 3 BIOS Setup This chapter provides information on the BIOS Setup program and allows you to configure the system for optimum use. You may need to run the Setup program when: ² An error message appears on the screen during the system booting up, and requests you to run SETUP. -
Page 38: Entering Setup
MS-9642 Mainboard Entering Setup Power on the computer and the system will start POST (Power On Self Test) process. When the message below appears on the screen, press <F1> key to enter Setup. Press F1 to enter SETUP 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 39: Control Keys
BIOS Setup Control Keys < > Move to the previous item < > Move to the next item < > Move to the item in the left hand < > Move to the item in the right hand Select the item <Enter>... -
Page 40: The Menu Bar
MS-9642 Mainboard The Menu Bar Main Use this menu for basic system configurations, such as time, date etc. Advanced Use this menu to set up the items of special enhanced features available on your system’s chipset. PC Health This entry monitors your hardware health status. Security Use this menu to set Supervisor and User Passwords. -
Page 41: Main
BIOS Setup Main Date (mm:dd:yy) The date format is <Day>, <Month> <Date> <Year>. Time (hh:mm:ss) The time format is <Hour> <Minute> <Second>. IDE Channel 0/1 Master/Slave Press PgUp/<+> or PgDn/<-> to select [Manual], [None] or [Auto] type. Note that the specifications of your drive must match with the drive table. - Page 42 MS-9642 Mainboard Halt On The setting determines whether the system will stop if an error is detected at boot. When the system stops for the errors preset, it will halt on for 15 seconds and then automatically resume its operation. Available options are: [All Errors] The system stops when any error is detected.
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Page 43: Advanced
BIOS Setup Advanced Advanced BIOS Features The sub-menu is used to configure chipset features for optimal system performance. Quick Power On Self Test Select [Enabled] to reduce the amount of time required to run the power-on self-... - Page 44 MS-9642 Mainboard test (POST). A quick POST skips certain steps. We recommend that you nor- mally disable quick POST. Better to find a problem during POST than lose data during your work. Boot Up NumLock Status This setting is to set the Num Lock status when the system is powered on. Setting to [On] will turn on the Num Lock key when the system is powered on.
- Page 45 BIOS Setup Advanced Chipset Features The sub-menu is used to configure chipset features for optimal system performance. 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 DRAM timing to be determined automatically by BIOS based on the configurations on the SPD.
- Page 46 MS-9642 Mainboard System Memory Frequency Use this item to configure the clock frequency of the installed DRAMs. **VGA Setting** The following items allow you to configure the VGA settings of the system. PEG/Onchip VGA Control This setting allows you to select whether to use the onchip graphics processor or the PCI Express card.
- Page 47 BIOS Setup Integrated Peripherals Onboard Device USB Controller This setting is used to enable/disable the onboard USB controller. USB 2.0 Controller This setting is used to enable/disable the onboard USB 2.0 controller. USB Keyboard/Mouse Support Set to [Enabled] if your need to use a USB-interfaced keyboard/mouse in the 3-11...
- Page 48 MS-9642 Mainboard operating system that does not support or have any USB driver installed, such as DOS and SCO Unix. Azalia/AC97 Audio Select Azalia is the codename of “High Definition Audio.” This setting controls the High Definition Audio interface integrated in the Southbridge. Audio Amplifier Control This setting disables/enables the audio amplifier.
- Page 49 BIOS Setup Super IO Device Serial Port Setting Onboard Serial Port 1 / 2 / 3 / 4 / 5 Select an address for Serial Port 1/2/3/4/5. Serial Port 1 / 2 / 3 / 4 / 5 Use IRQ Select a corresponding interrupt for Serial Port 1/2/3/4/5.
- Page 50 MS-9642 Mainboard Serial Port 2 / 3 Mode These settings specify the transmission mode of the Serial Port 2 & 3. RS-422 defines a Balanced (differential) interface, specifying a single, unidirectional driver with multiple receivers (up to 32). RS-422 will support Point-to-Point, Multi-Drop circuits, but not Multi-Point.
- Page 51 BIOS Setup 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. To clear the warning message, set the field to [Reset]. The setting of the field will automatically return to [Enabled] later.
- Page 52 MS-9642 Mainboard Soft-Off by PWR-BTTN N This feature allows users to configure the power button function. Settings are: [Instant-Off] The power button functions as a normal power-on/-off button. [Delay 4 Sec.] When you press the power button, the computer enters the suspend/sleep mode, but if the button is pressed for more than four seconds, the computer is turned off.
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Page 53: Pc Health
BIOS Setup PC Health Smart Fan Setting Smart System / CPU Fan Temp. Select a temperature setting here, and if the temperature of the CPU/system climbs up to the selected temperature setting, the system will automatically 3-17... - Page 54 MS-9642 Mainboard increase the speed of the CPU/system fan to cool down the overheated CPU/ system. System / CPU Temp Tolerance You can select a fan tolerance value here for the specific range for the Smart System / CPU Fan Temp. items. If the current temperatures of the fans reach the maximum threshold (the temperatures set in the Smart System / CPU Fan Temp.
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Page 55: Security
BIOS Setup Security Set Supervisor Password Supervisor Password controls access to the BIOS Setup utility. Set User Password User Password controls access to the system at boot. Security Option This specifies the type of BIOS password protection that is implemented. Settings are described below: Op ti on Description... -
Page 56: System
MS-9642 Mainboard System Machine Type/M odel, Processor, Processor Cache Size, Processor Speed, System Memory Type, Video Controller, BIOS Date, BIOS Version These items show the hardware specifications of your system. Read only. 3-20... -
Page 57: Boot
BIOS Setup Boot Hard Disk Boot Priority This setting allows users to set the boot priority of the specified hard disk devices. First press <Enter> to enter the sub-menu. Then you may use the arrow keys ( to select the desired device, then press <+>, <-> or <PageUp>, <PageDown> key to move it up/down in the priority list. -
Page 58: Exit
MS-9642 Mainboard Exit Load Fail-Safe Defaults Use this menu to load the default values set by the BIOS vendor for stable system performance. Load Optimized Defaults Use this menu to load the default values set by the mainboard manufacturer specifi- cally for optimal performance of the mainboard. -
Page 59: Chapter 4 System Resources
System Resources Chapter 4 System Resources This chapter provides information on the following system resources: 1. Watch Dog Timer Setting (p.4-2); 2. Award POST Code (p.4-4); 3. Check Point & Beep Code List (p.4-10); 4. Resource List (p.4-17). -
Page 60: Watch Dog Timer Setting
MS-9642 Mainboard Watch Dog Timer Setting ifdef Superio_Support_Watch_Dog extrn Watch_Dog_Item:near extrn WD_Timer_Item:near mov si,offset MENUITEMGROUP:Watch_Dog_Item call F000_GetItem_Value test al, Watch_Dog_Cmos_bits ;jump if disable mov dx, 04Eh ;Enter config mov al, 087h dx,al NEWIODELAY dx,al NEWIODELAY mov al,07h ;Logical Device 8 mov dx, 04Eh dx,al NEWIODELAY... - Page 61 System Resources WD_reboot: mov si,offset MENUITEMGROUP:WD_Timer_Item call F000_GetItem_Value mov ah, al mov al,0F6h ;Set time mov dx, 04Eh dx,al NEWIODELAY mov al, ah ;fill time 9641_046 dx,al NEWIODELAY mov dx, 04Eh ;Exit config mov al, 0AAh dx, al NEWIODELAY endif ;Superio_Support_Watch_Dog...
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Page 62: Award Post Code
MS-9642 Mainboard Award POST Code Award BIOS Error Message and Check Point (POST code) List (Need to be modified, TBD) Error/Process Message. Short Name Description Possible FRUS CMOS Checksum of CMOS is incorrect, so the System board checksum error system loads the default equipment - Defaults configuration. -
Page 63: System Resources
System Resources Check Point List POST (hex) Description Test CMOS R/W functionality. Early chipset initialization: -Disable shadow RAM -Disable L2 cache (socket 7 or below) -Program basic chipset registers Detect memory -Auto-detection of DRAM size, type and ECC. -Auto-detection of L2 cache (socket 7 or below) Set Initial Conditions (Default Values) in EBP Determine FSB frequency. - Page 64 MS-9642 Mainboard Auto detect flash type to load appropriate flash R/W codes into the run time area in F000 for ESCD & DMI support. Reserved Use walking 1’s algorithm to check out interface in CMOS circuitry. Also set real-time clock power status, and then check for override.
- Page 65 System Resources Reserved Reserved Reserved 1. Initialize multi-language 2. Put information on screen display, including Award title, CPU type, CPU speed …. Reserved Reserved Reserved Reserved Reserved Reset keyboard except Winbond 977 series Super I/O chips. Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
- Page 66 MS-9642 Mainboard Initialize USB Reserved Test all memory (clear all extended memory to 0) Reserved Reserved Display number of processors (multi-processor platform) Reserved 1. Display PnP logo 2. Early ISA PnP initialization -Assign CSN to every ISA PnP device. Reserved Initialize the combined Trend Anti-Virus code.
- Page 67 System Resources Reserved Detect serial ports & parallel ports. Reserved Reserved Detect & install co-processor Reserved Reserved Reserved Reserved 1. Switch back to text mode if full screen logo is supported. -If errors occur, report errors & wait for keys -If no errors occur or F1 key is pressed to continue: wClear EPA or customization logo.
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Page 68: Check Point & Beep Code List
MS-9642 Mainboard Check Point & Beep Code List Bootblock Initialization Code Checkpoints Checkpoint Description Before D0 If boot block debugger is enabled, CPU cache-as-RAM functionality is enabled at this point. Stack will be enabled from this point. Early Boot Strap Processor (BSP) initialization like microcode update, frequency and other CPU critical initialization. -
Page 69: Bootblock Recovery Code Checkpoints
System Resources Bootblock Recovery Code Checkpoints Checkpoint Description Initialize the floppy controller in the super I/O. Some interrupt vectors are initialized. DMA controller is initialized. 8259 interrupt controller is initialized. L1 cache is enabled. Set up floppy controller and data. Attempt to read from floppy. Enable ATAPI hardware. -
Page 70: Post Code Checkpoints
MS-9642 Mainboard POST Code Checkpoints Checkpoint Description Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST, Runtime data area. Also initialize BIOS modules on POST entry and GPNV area. Initialized CMOS as mentioned in the Kernel Variable "wCMOSFlags." Check CMOS diagnostic byte to determine if battery power is OK and CMOS checksum is OK. - Page 71 System Resources Initializes different devices through DIM. See DIM Code Checkpoints section of document for more information. Initializes different devices. Detects and initializes the video adapter installed in the system that has optional ROMs. Initializes all the output devices. Allocate memory for ADM module and uncompress it. Give control to ADM module for initialization.
- Page 72 MS-9642 Mainboard Initialization of system management interrupts by invoking all handlers. Please note this checkpoint comes right after checkpoint 20h Clean-up work needed before booting to OS. Takes care of runtime image preparation for different BIOS modules. Fill the free area in F000h segment with 0FFh.
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Page 73: Beep Codes
System Resources Beep Codes Boot Block Beep Codes Number of Beeps Description Insert diskette in floppy drive A: ‘AMIBOOT.ROM’ file not found in root directory of diskette in A: Base Memory error Flash Programming successful Floppy read error Keyboard controller BAT command failed No Flash EPROM detected Floppy controller failure Boot Block BIOS checksum error... - Page 74 MS-9642 Mainboard Troubleshooting POST BIOS Beep Codes Number of Beeps Troubleshooting Action 1, 2 or 3 Reseat the memory, or replace with known good modules. 4-7, 9-11 Fatal error indicating a serious problem with the system. Consult your system manufacturer. Before declaring the motherboard beyond all hope, eliminate the possibility of interference by a malfunctioning add-in card.
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Page 75: Resource List
System Resources Resource List ICH7 GPI/O Definition 4-17... - Page 76 MS-9642 Mainboard Winbond W83627EHG SIO GPI/O Definition GPIO Power Connection GPIO10 AUXGPIO10 GPIO11 AUXGPIO11 GPIO12 AUXGPIO12 GPIO13 AUXGPIO13 GPIO14 AUXGPIO14 GPIO15 AUXGPIO15 GPIO16 AUXGPIO16 GPIO17 AUXGPIO17 GPIO20 AUXFAN_PWM GPIO21 AUX_FAN GPIO22 GPIO23 GPIO24 GPIO25 GPIO26 GPIO27 GPIO30 AUXGPIO20 GPIO31 AUXGPIO21 GPIO32 AUXGPIO22 GPIO33...
- Page 77 System Resources I/O Map I/O Port Description 0000-000F DMA Controller 1 0020-0021 Interrupt Controller 1 0040-0043 System Timer 004E-004F SIO Port 0060, 0064 Keyboard Controller 0070-0073 RTC and CMOS 0080-0090 DMA Controller Page Registers 0092 Port 92h 00A0-00A1 Interrupt Controller 2 00B2-00B3 APM register 00C0-00DF DMA Controller 2 00F0-00FF Numeric Data Processor...
- Page 78 MS-9642 Mainboard PCI Devices 4-20...
- Page 79 System Resources SMBus Resource Allocation SMBus Resource Allocation Device Address Description MS-7 0101 111X MSI ACPI Controller DIMM Slot 1010 0000 SPD ISA Interrupt Allocation Description IRQ0 System Timer IRQ1 Keyboard Controller IRQ2 Second 8259A IRQ3 COM2 / COM4 IRQ4...