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INTRODUCTION

MI900 User’s Manual

Introduction

Checklist

Your MI900 Core 2 Duo motherboard package should include the items
listed below:

•

The MI900 motherboard

•

This User’s manual

•

1 x I/O shield

•

1 x IDE cable

•

1 x SATA cable

•

1 CD containing the following:

•

Chipset Drivers

•

Flash Memory Utility

Содержание MI900

Страница 1: ...MI900 LGA775 Core 2 Duo Intel Q965 Chipset Mini ITX Motherboard USER S MANUAL Version 1 0 ...

Страница 2: ...onal Business Machines Corporation Intel is a trademark or registered trademark of Intel Corporation Microsoft Windows is a registered trademark of Microsoft Corporation Winbond is a registered trademark of Winbond Electronics Corporation All other product names or trademarks are properties of their respective owners ...

Страница 3: ...ory 7 Setting the Jumpers 8 Connectors on MI900 12 BIOS Setup 23 Drivers Installation 45 Intel Q965 Chipset Software Installation Utility 46 Intel Q965 Chipset Graphics Driver 48 Realtek Codec Audio Driver Installation 50 Intel LAN Drivers Installation 51 Appendix 54 A I O Port Address Map 54 B Interrupt Request Lines IRQ 55 C Watchdog Timer Configuration 56 MI900 User s Manual iii ...

Страница 4: ...iv MI900 User s Manual This page is intentionally left blank ...

Страница 5: ...ion Checklist Your MI900 Core 2 Duo motherboard package should include the items listed below The MI900 motherboard This User s manual 1 x I O shield 1 x IDE cable 1 x SATA cable 1 CD containing the following Chipset Drivers Flash Memory Utility ...

Страница 6: ...onboard Intel Q965 integrated graphics for CRT and an optional SDVO card supporting either an LVDS or DVI display interface LAN functionality is supported with a 10 100 Ethernet controller or with two Gigabit Ethernet controllers MI900 is expandable for 8x2 pins pin header for adaptor card ID394 that support 2 or 4 serial ports or ID395 that support TPM 1 2 for security function Other useful featu...

Страница 7: ...rd headers SATA II Intel ICH8 built in SATA II controller 3 0Gb sec w 4 ports IDE JMicron JMB368 PCI e to PATA x1 for 1 PATA channel Audio Intel ICH8 built in high definition audio w Realtek ALC888 Codec LPC I O Winbond W83627EHF COM1 RS232 COM2 RS232 422 485 Hardware monitor Edge Connectors Mini DIN for PS 2 KB MS DB9 connector for COM1 DB15 connector for VGA RJ45 dual USB stack connector x2 for ...

Страница 8: ...INSTALLATIONS Board Dimensions 4 MI900 User s Manual ...

Страница 9: ...section provides information on how to use the jumpers and connectors on the MI900 in order to set up a workable system The topics covered are Installing the CPU 6 ATX Power Installation 6 Installing the Memory 7 Setting the Jumpers 8 Connectors on MI900 12 ...

Страница 10: ...ote that the cover of the LGA775 socket must always be installed during transport to avoid damage to the socket ATX Power Installation The system power is provided to the motherboard with the ATX1 and ATX2 power connectors ATX1 is a 24 pin power connector and ATX2 is a 4 pin 12V power connector The 24 pin power connector can to be connected to a standard 20 pin ATX power connector in a standard AT...

Страница 11: ... Basically the system memory interface has the following features Supports two 64 bit wide DDR data channels Available bandwidth up to 6 4GB s DDR2 800 for single channel mode Supports 256Mb 512Mb 1Gb DDR2 technologies Supports only x8 x16 DDR2 devices with four banks Supports only unbuffered DIMMs Supports opportunistic refresh Up to 32 simultaneously open pages four per row four rows maximum ...

Страница 12: ...cording to your needs and applications Contact your supplier if you have doubts about the best configuration for your needs The following lists the connectors and their respective functions Jumper Locations on MI900 MI900F 9 JBAT1 Clear CMOS Contents 10 JP1 JP2 JP3 RS232 422 485 COM2 Selection 10 JP6 Processor Setting 10 J6 Power ON Setting 11 ...

Страница 13: ...NS Jumper Locations on MI900 MI900F Jumper Locations on MI900 MI900F 9 JBAT1 Clear CMOS Contents 10 JP1 JP2 JP3 RS232 422 485 COM2 Selection 10 JP6 Processor Setting 10 J6 Power ON Setting 11 MI900 User s Manual 9 ...

Страница 14: ...tion COM1 is fixed for RS 232 use only COM2 is selectable for RS232 RS 422 and RS 485 ID394 COM3 and COM4 are fixed for RS 232 use only The following table describes the jumper settings for COM2 selection COM2 Function RS 232 RS 422 RS 485 Jumper Setting pin closed JP3 1 2 JP1 3 5 4 6 JP2 3 5 4 6 JP3 3 4 JP1 1 3 2 4 JP2 1 3 2 4 JP3 5 6 JP1 1 3 2 4 JP2 1 3 2 4 JP6 Processor Setting JP6 Setting Proc...

Страница 15: ...INSTALLATIONS J6 Power ON Setting J6 Setting Function Pin 1 2 Short Closed Power on by system button Pin 2 3 Short Closed Power on by power supply AC on MI900 User s Manual 11 ...

Страница 16: ...ial Ports 15 VGA1 VGA CRT Connector 16 CN3 Marvell 88E8053 PCI express Gigabit LAN and USB6 7 Connector 16 CN6 Intel 82562V 10 100 or Intel 82566DC GbE RJ 45 and USB4 5 Connector 16 CN4 Audio Connector 16 F_USB1 USB0 USB1 Connector 17 S_ATA1 S_ATA2 S_ATA3 S_ATA4 SATA HDD Connectors 17 IDE1 Primary IDE Connectors 17 J2 Digital I O Connector 4 in 4 out 18 J4 External Audio Connector for 7 1 channel ...

Страница 17: ...CN3 Marvell 88E8053 PCI express Gigabit LAN and USB6 7 Connector 16 CN6 Intel 82562V 10 100 or Intel 82566DC GbE RJ 45 and USB4 5 Connector 16 CN4 Audio Connector 16 F_USB1 USB0 USB1 Connector 17 S_ATA1 S_ATA2 S_ATA3 S_ATA4 SATA HDD Connectors 17 IDE1 Primary IDE Connectors 17 J2 Digital I O Connector 4 in 4 out 18 J4 External Audio Connector for 7 1 channel 18 JP4 For LPC I F Adaptor Card 18 J5 P...

Страница 18: ... 5V 20 8 Power good 5V 21 9 5VSB 5V 22 10 12V 5V 23 11 12V Ground 24 12 3 3V ATX2 ATX 12V Power Connector This connector supplies the CPU operation voltage Pin Signal Name 1 Ground 2 Ground 3 12V 4 12V CPU_FAN1 CPU Fan Power Connector Pin Signal Name 1 Control 2 Sense 3 12V 4 Ground PWR_FAN1 SYSTEM Fan Power Connectors Pin Signal Name 1 Sense 2 12V 3 Rotation detection 14 MI900 User s Manual ...

Страница 19: ...e J3 are COM pin header connectors Signal Name Pin Pin Signal Name DCD Data carrier detect 1 6 DSR Data set ready RXD Receive data 2 7 RTS Request to send TXD Transmit data 3 8 CTS Clear to send DTR Data terminal ready 4 9 RI Ring indicator GND ground 5 10 Not Used J3 COM2 is jumper selectable for RS 232 RS 422 and RS 485 Pin Signal Name RS 232 R2 422 RS 485 1 DCD TX DATA 2 RX TX DATA 3 TX RX NC 4...

Страница 20: ...ignal Name Red 1 2 Green Blue 3 4 N C GND 5 6 GND GND 7 8 GND VCC 9 10 GND N C 11 12 DDCDATA HSYNC 13 14 VSYNC DDCCLK 15 CN3 Marvell 88E8053 PCI express Gigabit LAN and USB6 7 Connector CN6 Intel 82562V 10 100 or Intel 82566DC GbE RJ 45 and USB4 5 Connector Note 10 100 LAN for MI900 DUAL Gigabit LAN for MI900F CN4 Audio Connector CN4 is a 3 jack audio connector 16 MI900 User s Manual ...

Страница 21: ...und Host data 7 3 4 Host data 8 Host data 6 5 6 Host data 9 Host data 5 7 8 Host data 10 Host data 4 9 10 Host data 11 Host data 3 11 12 Host data 12 Host data 2 13 14 Host data 13 Host data 1 15 16 Host data 14 Host data 0 17 18 Host data 15 Ground 19 20 Protect pin DRQ0 21 22 Ground Host IOW 23 24 Ground Host IOR 25 26 Ground IOCHRDY 27 28 Host ALE DACK0 29 30 Ground IRQ14 31 32 No connect Addre...

Страница 22: ...l Audio Connector for 7 1 channel Signal Name Pin Pin Signal Name SIDESURR L 1 2 SIDESURR R SIDESURR Detect 3 4 Ground SURR Out L 5 6 SURR Out R SURR Out Detect 7 8 Ground Center Out 9 10 LFE Out Center LFE Detect 11 12 Ground JP4 For LPC I F Adaptor Card ID394 with Fintek F81216 2 or 4 Serial Ports ID395 Winbond WPCT200 x1 for TPM1 2 J5 Power LED The power LED indicates the status of the main pow...

Страница 23: ...e system to power off Hard Disk Drive LED Connector Pins 3 and 4 This connector connects to the hard drive activity LED on control panel This LED will flash when the HDD is being accessed Pin Signal Name 4 HDD Active 3 5V Reset Switch Pins 5 and 6 The reset switch allows the user to reset the system without turning the main power switch off and then on again Orientation is not required when making...

Страница 24: ...eady RXD Receive data 3 4 RTS Request to send TXD Transmit data 5 6 CTS Clear to send DTR Data terminal ready 7 8 RI Ring indicator GND ground 9 10 Not Used DCD Data carrier detect 11 12 DSR Data set ready RXD Receive data 13 14 RTS Request to send TXD Transmit data 15 16 CTS Clear to send DTR Data terminal ready 17 18 RI Ring indicator GND ground 19 20 Not Used CN1 LPC I F connectors Package list...

Страница 25: ...INSTALLATIONS ID395 WINBOND WPCT200 for TPM1 2 CN1 LPC I F connectors Package list Nylon Nut x 1 Screw x 2 Washer x2 MI900 User s Manual 21 ...

Страница 26: ...INSTALLATIONS 22 MI900 User s Manual This page is intentionally left blank ...

Страница 27: ...ction 24 BIOS Setup 24 Standard CMOS Setup 26 Advanced BIOS Features 29 Advanced Chipset Features 32 Integrated Peripherals 33 Power Management Setup 36 PNP PCI Configurations 38 PC Health Status 39 Frequency Voltage Control 40 Load Fail Safe Defaults 41 Load Optimized Defaults 41 Set Supervisor User Password 41 Save Exit Setup 41 Exit Without Saving 41 2nd SuperIO Device 42 Security Chip Configur...

Страница 28: ...S is immediately activated Pressing the Del key immediately allows you to enter the Setup utility If you are a little bit late pressing the Del key POST Power On Self Test will continue with its test routines thus preventing you from invoking the Setup If you still wish to enter Setup restart the system by pressing the Reset button or simultaneously pressing the Ctrl Alt and Delete keys You can al...

Страница 29: ...displays the control keys for this menu At the bottom of the Main Menu just below the control keys section there is another section which displays information on the currently highlighted item in the list Note If the system cannot boot after making and saving system changes with Setup the Award BIOS supports an override to the CMOS settings that resets your system to its default Warning It is stro...

Страница 30: ... 16 11 00 Menu Level IDE Channel 0 Master None Change the day month Year and century IDE Channel 0 Slave None IDE Channel 1 Master None IDE Channel 1 Slave IDE Channel 2 Master IDE Channel 3 Master IDE Channel 4 Master IDE Channel 4 Slave None None None None None Video EGA VGA Halt On All But Keyboard Base Memory 640K Extended Memory 2086912K Total Memory 2087936K At the bottom of the menu are the...

Страница 31: ...Serial ATA hard disks Each channel can support up to two hard disks the first is the Master and the second is the Slave Press Enter to configure the hard disk The selections include Auto Manual and None Select Manual to define the drive information manually You will be asked to enter the following items Capacity Capacity size of the hard disk drive Cylinder Number of cylinders Head Number of read ...

Страница 32: ... mode CGA 80 Power up in 80 column mode MONO For Hercules or MDA adapters Halt On This field determines whether or not the system will halt if an error is detected during power up No errors The system boot will not be halted for any error that may be detected All errors Whenever the BIOS detects a non fatal error the system will stop and you will be prompted All But Keyboard The system boot will n...

Страница 33: ...ect For DRAM 64MB Non OS2 Small Logo EPA Show Disabled CPU Feature Press Enter to configure the settings relevant to CPU Feature Hard Disk Boot Priority With the field there is the option to choose aside from the hard disks connected Bootable add in Cards which refers to other external devices Virus Warning If this option is enabled an alarm message will be displayed when trying to write on the bo...

Страница 34: ...earch for an OS from other devices other than the ones selected in the First Second Third Boot Device Boot Up NumLock Status This allows you to activate the NumLock function after you power up the system Gate A20 Option This field allows you to select how Gate A20 is worked Gate A20 is a device used to address memory above 1 MB Typematic Rate Setting When disabled continually holding down a key on...

Страница 35: ...t setting is Enabled MPS Version Control for OS This option is specifies the MPS Multiprocessor Specification version for the OS MPS version 1 4 added extended configuration tables to improve support for multiple PCI bus configurations and improve future expandability The default setting is 1 4 OS Select for DRAM 64MB This option allows the system to access greater than 64MB of DRAM memory when us...

Страница 36: ...B System BIOS Cacheable The setting of Enabled allows caching of the system BIOS ROM at F000h FFFFFh resulting in better system performance However if any program writes to this memory area a system error may result Memory Hole At 15M 16M In order to improve performance certain space in memory can be reserved for ISA cards This memory must be mapped into the memory space below 16 MB The choices ar...

Страница 37: ... Level IDE Primary Slave PIO Auto IDE Primary Master UDMA Auto IDE Primary Slave UDMA Auto On Chip Secondary PCI IDE Enabled IDE Secondary Master PIO Auto IDE Secondary Slave PIO Auto IDE Secondary Master UDMA Auto IDE Secondary Slave UDMA Auto SATA Mode LEGACY Mode Support IDE Enabled Phoenix AwardBIOS CMOS Setup Utility SuperIO Device POWER ON Function BUTTON ONLY ITEM HELP KB Power ON Password ...

Страница 38: ... available mode IDE Primary Secondary Master Slave UDMA These fields allow your system to improve disk I O throughput to 33Mb sec with the Ultra DMA 33 feature The options are Auto and Disabled SATA Mode The setting choices for the SATA Mode are IDE RAID and AHCI Mode Select IDE if you want to have SATA function as IDE Select AHCI for Advanced Host Controller Interface AHCI feature with improved S...

Страница 39: ...1 3F8 IRQ4 Serial Port 2 2F8 IRQ3 PWRON After PWR Fail This field sets the system power status whether on or off when power returns to the system from a power failure situation USB 1 0 Controller The options for this field are Enabled and Disabled By default this field is set to Enabled USB 2 0 Controller The options for this field are Enabled and Disabled By default this field is set to Enabled I...

Страница 40: ... COM LPT Port Enabled PCI PIRQ A D Enabled ACPI Function Enable this function to support ACPI Advance Configuration and Power Interface ACPI Suspend The default setting of the ACPI Suspend mode is S1 POS Power Management This field allows you to select the type of power saving management modes There are four selections for Power Management Min Power Saving Minimum power management Max Power Saving...

Страница 41: ...e power button In the Delay 4 Sec mode the system powers off when the power button is pressed for more than four seconds or enters the suspend mode when pressed for less than 4 seconds CPU THRM Throttling When the system enters Doze mode the CPU clock runs only part of the time You may select the percent of time that the clock runs Resume by Alarm This field enables or disables the resumption of t...

Страница 42: ...Auto INT Pin 7 Assignment Auto INT Pin 8 Assignment Auto PCI Express relative items Maximum Payload Size 128 Init Display First The default setting is PCI Card Reset Configuration Data The default value is Disabled Resources Controlled by This PnP BIOS can configure all of the boot and compatible devices with the use of a PnP operating system such as Windows 95 PCI VGA Palette Snoop Some non stand...

Страница 43: ... user to set the temperature so that when the temperature is reached the system sounds a warning This function can help prevent damage to the system that is caused by overheating Shutdown Temperature This field allows the user to set the temperature by which the system automatically shuts down once the threshold temperature is reached This function can help prevent damage to the system that is cau...

Страница 44: ...ltage Control Auto Detect PCI Clk Disabled ITEM HELP Spread Spectrum Disabled Menu Level Auto Detect PCI Clk This field enables or disables the auto detection of the PCI clock Spread Spectrum This field sets the value of the spread spectrum The default setting is Disabled This field is for CE testing use only ...

Страница 45: ...Password message prompts on the screen Type the password up to eight characters in length and press Enter The system confirms your password by asking you to type it again After setting a password the screen automatically returns to the main screen To disable a password just press the Enter key when you are prompted to enter the password A message will confirm the password to be disabled Once the p...

Страница 46: ...r Menu Level Phoenix AwardBIOS CMOS Setup Utility 2 nd SuperIO Device Onboard Serial Port 3 230h ITEM HELP Serial Port 3 Use IRQ IRQ5 Onboard Serial Port 4 238h Menu Level Serial Port 4 Use IRQ IRQ7 Onboard Serial Port 5 Disabled Serial Port 5 Use IRQ IRQ10 Onboard Serial Port 6 Serial Port 6 Use IRQ Disabled IRQ11 Onboard Serial Port These fields allow you to select the onboard serial and paralle...

Страница 47: ...als Security Chip Configuration Set Supervisor Password Set User Password Power Management Setup Save Exit Setup PnP PCI Configurations Exit Without Saving PC Health Status ESC Quit Ç È Æ Å Select Item F10 Save Exit Setup Time Date Hard Disk Type Phoenix AwardBIOS CMOS Setup Utility Advanced BIOS Features TPM Support Disabled ITEM HELP TPM Current Status Disabled Deactivated Menu Level X TPM Statu...

Страница 48: ...BIOS SETUP 44 MI900 User s Manual This page is intentionally left blank ...

Страница 49: ...ease contact the vendor where you made the purchase The contents of this section include the following Intel Q965 Chipset Software Installation Utility 46 Intel Q965 Chipset Graphics Driver 48 Realtek Codec Audio Driver Installation 50 Intel LAN Drivers Installation 51 IMPORTANT NOTE After installing your Windows operating system Windows 2000 XP you must install first the Intel Chipset Software In...

Страница 50: ...t components Follow the instructions below to complete the installation under Windows 2000 XP Before installed Intel Chipset Software Installation Utility Please update your system to Windows 2000 SP4 or Windows XP SP1A 1 Insert the CD that comes with the board and the screen below would appear Click Intel R Q965 Chipset Drivers then Intel R Chipset Software Installation Utility 46 MI900 User s Ma...

Страница 51: ...Yes to accept the software license agreement and proceed with the installation process 4 On the Readme Information screen click Next to continue the installation 5 The Setup process is now complete Click Finish to restart the computer and for changes to take effect MI900 User s Manual 47 ...

Страница 52: ...o complete the installation under Windows 2000 XP 1 Insert the CD that comes with the board and the screen below would appear Click Intel R Q965 Chipset Drivers then Intel R Q965 Chipset Family Graphics Driver 2 When the Welcome screen appears click Next to continue 48 MI900 User s Manual ...

Страница 53: ...ed with the installation process 4 On Readme File Information screen click Next to continue 5 On Setup Progress screen click Next to continue the installation 6 The Setup process is now complete Click Finish to restart the computer and for changes to take effect MI900 User s Manual 49 ...

Страница 54: ...oard and the screen below would appear Click Intel R Q965 Chipset Drivers then Realtek High Definition Codec Audio Driver 2 When the Welcome screen appears click Next to continue 3 The Setup process is now complete Restart the computer when prompted for changes to take effect 50 MI900 User s Manual ...

Страница 55: ...nstalling the Intel PCI Express Gigabit LAN drivers 1 Insert the CD that comes with the board On the initial screen Click Intel R Q965 Chipset Drivers then Intel R PRO LAN Network Drivers 2 On the next screen click Install Drivers to start the drivers installation MI900 User s Manual 51 ...

Страница 56: ... the software license agreement and proceed with the installation process 5 When the Setup Type appears click Complete and Next to continue 6 When the Ready to Install the Program screen appears click Install to continue 7 The Setup process is now complete InstallShield Wizard Completed Click Finish to restart the computer and for changes to take effect 52 MI900 User s Manual ...

Страница 57: ...hen Marvell LAN Controller Drivers 2 Click Next when the InstallShield Wizard welcome screen appears 3 Click Next to agree with the license agreement 4 Click Next when the Readme Information screen appears to proceed with the drives installation process 5 When the Installation is complete click Finish for the changes to take effect MI900 User s Manual 53 ...

Страница 58: ...imer 060h 06Fh Keyboard Controller 070h 07Fh Real Time Clock NMI 080h 09Fh DMA Page Register 0A0h 0BFh Interrupt Controller 2 0C0h 0DFh DMA Controller 2 0F0h Clear Math Coprocessor Busy Signal 0F1h Reset Math Coprocessor 1F0h 1F7h IDE Interface 278h 27Fh Parallel Port 2 LPT2 2F8h 2FFh Serial Port 2 COM2 2B0h 2DFh Graphics adapter Controller 378h 3FFh Parallel Port 1 LPT1 360h 36Fh Network Ports 3B...

Страница 59: ...ng table shows the IRQ used by the devices on board Level Function IRQ0 System Timer Output IRQ1 Keyboard IRQ2 Interrupt Cascade IRQ3 Serial Port 2 IRQ4 Serial Port 1 IRQ5 Reserved IRQ6 Floppy Disk Controller IRQ7 Parallel Port 1 IRQ8 Real Time Clock IRQ9 Reserved IRQ10 Reserved IRQ11 Reserved IRQ12 PS 2 Mouse IRQ13 80287 IRQ14 Primary IDE IRQ15 Secondary IDE ...

Страница 60: ...ls before the timer counts to zero SAMPLE CODE THIS CODE AND INFORMATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OR FITNESS FOR A PARTICULAR PURPOSE include stdio h include stdlib h include W627EHF H int main int argc char argv void copyright void void EnableWDT int void DisableWDT void in...

Страница 61: ...mer n void EnableWDT int interval unsigned char bBuf bBuf Get_W627EHF_Reg 0x2D bBuf 0x01 Set_W627EHF_Reg 0x2D bBuf Enable WDTO Set_W627EHF_LD 0x08 switch to logic device 8 Set_W627EHF_Reg 0x30 0x01 enable timer bBuf Get_W627EHF_Reg 0xF5 bBuf 0x08 Set_W627EHF_Reg 0xF5 bBuf count mode is second Set_W627EHF_Reg 0xF6 interval set timer void DisableWDT void Set_W627EHF_LD 0x08 switch to logic device 8 ...

Страница 62: ...ed int result unsigned char ucDid W627EHF_BASE 0x2E result W627EHF_BASE ucDid Get_W627EHF_Reg 0x20 if ucDid 0x88 goto Init_Finish W627EHF_BASE 0x4E result W627EHF_BASE ucDid Get_W627EHF_Reg 0x20 if ucDid 0x88 goto Init_Finish W627EHF_BASE 0x00 result W627EHF_BASE Init_Finish return result void Unlock_W627EHF void outportb W627EHF_INDEX_PORT W627EHF_UNLOCK outportb W627EHF_INDEX_PORT W627EHF_UNLOCK...

Страница 63: ...ODE AND INFORMATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OR FITNESS FOR A PARTICULAR PURPOSE ifndef __W627EHF_H define __W627EHF_H 1 define W627EHF_INDEX_PORT W627EHF_BASE define W627EHF_DATA_PORT W627EHF_BASE 1 define W627EHF_REG_LD 0x07 define W627EHF_UNLOCK 0x87 define W627EHF_LOCK 0...

Страница 64: ...7HF H void ClrKbBuf void int main int argc char argv int main int argc char argv unsigned char ucDO 0 data for digital output unsigned char ucDI data for digital input unsigned char ucBuf Set_W627HF_LD 0x07 switch to logic device 7 Set_W627HF_Reg 0xF1 0x00 clear ucDI Get_W627HF_Reg 0xF1 0x0F ClrKbBuf while 1 ucDO Set_W627HF_Reg 0xF1 ucDO 0x0F 4 ucBuf Get_W627HF_Reg 0xF1 0x0F if ucBuf ucDI ucDI ucB...

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