Norco SHB-970 User Manual

Industrial full size cpu card

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SHB-970
Industrial Full Size CPU Card
User Manual V1.0

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Summary of Contents for Norco SHB-970

  • Page 1 SHB-970 Industrial Full Size CPU Card User Manual V1.0...
  • Page 2 SHB-970 Industrial Full Size CPU Card User Manual V1.0 SZ Headquarters: 0755-27331166 Beijing Office: 010-82671166 Shanghai Office: 021-61212081 Chengdu Office: 028-85259319 Shenyang Office: 024-23960846 Xi’an Office: 029-88338386 Nanjing Office: 025-58015489 Wuhan Office: 027-87858983 Tianjin Office: 022-23727100 Singapore: 65-68530809 Netherlands: 31-040-2668554 For more products information, please visit www.norco-group.com...
  • Page 3 Shenzhen NORCO Intelligent Technology Co.,Ltd. SHB-970 Industrial Full Size CPU Card Shenzhen NORCO Intelligent Technology Co.,Ltd. Place/Date: HONG KONG/2014...
  • Page 4 Trade Name: Shenzhen NORCO Intelligent Technology Co.,Ltd. Model Name:SHB-970 Responsible Party: Shenzhen NORCO Intelligent Technology Co., Ltd. Equipment Classification:FCC Class B Subassembly Type of Product:SHB-970 Industrial Full Size CPU Card Manufacturer: Shenzhen NORCO Intelligent Technology Co.,Ltd. Date: 2014...
  • Page 5 Before ordering products, please learn about the product performance from the distributors to see if it is in line with your needs. NORCO is a registered trademark of Shenzhen NORCO Intelligent Technology CO., LTD. The ownership of other trademarks involved in this manual is owned by its respective owners.
  • Page 6 Safety Instruction 1. Please read this manual carefully before using the product. 2. Put all the unused or uninstalled boards or cards in static shielding bags. 3. Always ground yourself to remove any static discharge before touching the board, to place your hands on grounding metal object for a while or wear a anti-static wrist strap at all times.
  • Page 7: Table Of Contents

    Table of Contents Chapter 1 Product Introduction................错误!未定义书签。 1.1 Overview............................. 1 1.2 Product Specification........................ 1 Chapter 2 Installation Instruction................. 错误!未定义书签。 2.1 Interfaces Location and Dimension..................4 2.2 Install CPU and RAM........................4 2.2.1 CPU Installation......................4 2.2.2 RAM Installation......................5 2.3 Jumper Setting...........................5 2.3.1 CMOS Clear/Hold Jumper Setting(JCC)..............5 2.3.2 Auto Power On Jumper Setting(JAT)........
  • Page 8 3.1 Main Menu....................错误!未定义书签。 3.2 Advanced Menu..................错误!未定义书签。 3.2.1 ACPI Configuration..............错误!未定义书签。 3.2.2 APM Configuration...............错误!未定义书签。 3.2.3 CPU Configuration............... 错误!未定义书签。 3.2.4 SATA Configuration..............错误!未定义书签。 3.2.5 Intel(R) Rapid start Technology..........错误!未定义书签。 3.2.6 USB Configuration............... 错误!未定义书签。 3.2.7 Super IO Configuration............... 错误!未定义书签。 3.2.8 H/W Monitor.................. 错误!未定义书签。 3.2.9 Serial Port Console Redirection..........错误!未定义书签。...
  • Page 9: Chapter 1 Product Introduction

    Chapter 1. Product Introduction...
  • Page 10: Product Specification

    Chapter 1 Product Introduction 1.1 Overview SHB-970 is a PICMG1.0 full size CPU card based on Intel B75 chipset, supporting Intel Sandy Bridge and Ivy Bridge Processors. 2x 240Pin DIMM slots support DDR3 1066/1333/1600MHz memory up to 16GB. Board provides up to 9 USB ports (1x USB3.0), 4x SATA ports (SATA1 supports SATA3.0), 2x COM ports, 1x LPT, 2x Gigabit Ethernet LAN ports and HD audio.
  • Page 11 SHB-970 Industrial Full Size CPU Card ●VGA: 1x standard VGA port, resolution: 2560X1600@60Hz Storage ●4x SATA 2.0 ( SATA1 supports SATA 3.) COM: ●Provide 2x COM ports ●COM1 & COM2 are 2*5Header port; COM1: RS232, COM2: RS232/422/485 LPT: ●One 2x13 Header Parallel Port USB: ●8x USB2.0...
  • Page 12 SHB-970 Industrial Full Size CPU Card Watchdog: ● Support reset function BIOS ●8MB SPI FLASH,AMI EFI BIOS. Environment: ●Operating Temperature: 0-60℃ ●Operating Humidity: 5%-95%...
  • Page 13: Chapter 2 Installation Instruction

    Industrial Full Size CPU Card Chapter 2 Installation Instruction 2.1 Interfaces Location and Dimension Following is the dimension diagram for SHB-970. Please follow this diagram and the instructions below to install your device. Improper installation of any components will lead to malfunction.
  • Page 14: Jumper Setting

    SHB-970 Industrial Full Size CPU Card (2)Hold the CPU by both sides and Position the CPU over the socket, making sure that the gold triangle is on the bottom-left corner of the socket then fit the socket alignment key into the CPU notch.
  • Page 15: Auto Power On Jumper Setting(Jat

    SHB-970 Industrial Full Size CPU Card JCC1 Setting JCC1 Clear CMOS, BIOS reset to factory settings Normal Status, Default settings 2.3.2 Auto Power ON Jumper Setting(JAT) 2.3.3 Power Mode Select Setting(J8)...
  • Page 16: Interfaces Description

    SHB-970 Industrial Full Size CPU Card Setting ATX POWER (default) AT POWER 2.3.4 COM2 Jumper Setting(J1, J2, J3) J1, J2, J3 jumpers are used to set up COM2 transmission mode. COM2 supports RS232/422/485. Default [RS232]. J1 J2 J2J2J2 COM2 RS232(Default)...
  • Page 17: Usb(Usb12, Usb34, Usb56, Usb78

    SHB-970 Industrial Full Size CPU Card SATA: Signal Name 2.4.2 USB(USB12, USB34, USB56, USB78) This CPU card provides 4 set 2×5Header USB2.0 ports, connecting 2x 5Pin USB signal to standard USB sockets. The 4 set USB ports can be converted to 8x standard USB sockets.
  • Page 18: Audio(Audio

    SHB-970 Industrial Full Size CPU Card LPT: Signal Name Signal Name T_STB# T_AFD# PDQ0 T_ERR# PDQ1 T_INIT# PDQ2 T_SLIN# PDQ3 PDQ4 PDQ5 PDQ6 PDQ7 T_ACK# T_BUSY T_PE T_SLCT 2.4.4 Audio(AUDIO) AUDIO CN-IN...
  • Page 19: Serial Ports(Com1, Com2

    SHB-970 Industrial Full Size CPU Card AUDIO: Signal Name Signal Name Mic-in_L Mic-in_R SPKOUT_L SPKOUT_R Line-in_L Line-in_R CD-IN: Signal Name CD-L CD-R 2.4.5 Serial Ports(COM1, COM2) This CPU card provides 2set 2×5PIN serial ports. COM1 and COM2 are fixed on the chassis with an covert cable(IDC10 to DB9)to connect external devices.
  • Page 20 SHB-970 Industrial Full Size CPU Card SOUT COM2: RS232/422/485, Pins defined as below: RS232(Default) RS422 RS485 DATA- DATA+ 2.4.6 Display Port(VGA) Board provides 1x standard DB15VGA port. VGA: Signal Name Signal Name Signal Name GREEN SDA_R BLUE HS_R...
  • Page 21: Lan Port(Lan

    SHB-970 Industrial Full Size CPU Card VS_R SCL_R 2.4.7 LAN Port(LAN) Board provides one RJ-45 Ethernet LAN port, with each side having one LED. The yellow LED indicates data transferring status and the green LED indicates network status. LAN1 LAN2 RJ45 LED:...
  • Page 22: Keyboard And Mouse Connector(Km

    SHB-970 Industrial Full Size CPU Card Signal Name Signal Name GP30 GP31 GP34 GP32 GP35 GP33 GP36 GP37 2.4.9 Keyboard & Mouse Connector(KM) KB/MS is a 6Pin Mini DIN socket for both the keyboard and mouse, to connect to keyboard and mouse simultaneously with a 1 to 2 PS/2 cable.
  • Page 23: Fan Connector(Cpufan

    SHB-970 Industrial Full Size CPU Card MS1: Signal Name MS_CLK MS_DATA 2.4.10 FAN Connector(CPUFAN) Board provides one 4Pin CPUFAN. When using this interface, please pay attention to the following points: (1) Fan power current should not above 350 mA (4.2W, 12V) (2) Make sure the fan cable can match the socket cable.
  • Page 24: Power Connector(J7, J4

    SHB-970 Industrial Full Size CPU Card 2.4.11 Power Connector(J7, J4) J7 provides +12V power to CPU; J4 provides 5VSB power to CPU card via the backplane; +12V, +5V DC input is supplied via the backplane slots. Signal Name SLP_BTN PS_ON...
  • Page 25 SHB-970 Industrial Full Size CPU Card JFP: Signal Name Signal Name PWR_LED+ KEYLOCK SPK_OUT SLP_BTN FP_PWRBTN- SLEEPLED+ SLEEPLED- RESET_SW- HDD_LED- Please follow the table below to connect, pay attention to the anode(+)and cathode(-), otherwise , some function cannot be realized.
  • Page 26 SHB-970 Industrial Full Size CPU Card 1)System Power LED Pins(Pin1, pin3 for POWERLED) Connect system power LED cable with these pins.(pin 1 is LED anode)When system is power on, power LED is on;when system is power off, power LED is off.
  • Page 27: Udimm Slots(Udimm1, Udimm2

    SHB-970 Industrial Full Size CPU Card 2.4.13 DIMM Slots(UDIMM1, UDIMM2) Board provides two 240Pin DIMM slots, non-ECC. B75 chipset supports dual channel DDR3 1066/1333/1600 DIMM with single capacity up to 4GB, maximum 8GB.
  • Page 28: Chapter 3 Bios Setup

    Chapter 3. BIOS SETUP...
  • Page 29: Ami Bios Flash

    SHB-970 Industrial Full Size CPU Card Chapter 3 BIOS SETUP AMI BIOS Flash BIOS functions as a bridge connecting hardware and operating system. Hardware and software are upgrading all the time, so when your system goes wrong, for example, your system can not support the newest CPU, you need to upgrade BIOS to keep up with the latest technology.
  • Page 30 SHB-970 Industrial Full Size CPU Card 2. When message “Press <DEL> to enter setup, <F11> to Popup menu”popup on the screen, please press <Del> key to enter BIOS SETUP interface. 3. Use the “←↑→↓”to choose the option which your want to modify, press <Enter> to go to sub- menu.
  • Page 31 SHB-970 Industrial Full Size CPU Card Me Information: ME Version, size System Date System Date Format: Month(Jan.-Dec.)/Date(01-31)/Year(up to 2099)/Week(Mon.~ Sun.). System Time System time format: Hour(00-23)//Minute(00-59)/Second(00-59). 3.2 Advanced Launch LAN1/2 PXE OpROM Enable or disable Boot Option for Legacy Network Devices.
  • Page 32 SHB-970 Industrial Full Size CPU Card Intel(R) Rapid Start Technology Intel Rapid Start Technology is the new technology of Intel 7 series Chipset. This technology is able to wake up the sleep system within 5-8 seconds and recover to the status before entering sleep mode.
  • Page 33 SHB-970 Industrial Full Size CPU Card 3.2.1 ACPI Configuration ACPI Sleep State Select ACPI Sleep state the system will enter when the SUSPEND button is pressed. S1 Only (CPU Stop Clock):CPU Stop Clock S3 Only (Suspend to Ram): Suspend to RAM...
  • Page 34 SHB-970 Industrial Full Size CPU Card 3.2.2 APM Configuration RTC Power On Function Enable or disable system wake up on alarm event. When enabled, system will wake on the hr::min::sec specified. RTC Power On Hour Set the specified hour that system wakeup...
  • Page 35: Cpu Configuration

    SHB-970 Industrial Full Size CPU Card 3.2.3 CPU Configuration The read only option contains detailed information of CPU, including CPU vendor, model, frequency, L1 cache, L2 cache, etc. Hyper-Threading Enabled for Windows XP and Linux (OS optimized for Hyper-threading technology) and Disabled for other OS (OS not optimized for Hyper-Threading Technology).
  • Page 36 SHB-970 Industrial Full Size CPU Card Execute Disabled Bit Execute Disable Bit (EDB) is a hardware-based security feature that introduced to its new generation CPU by Intel, which can help reduce system exposure to viruses and malicious code. EDB allows the processor to classify areas in memory where application code can or cannot execute.
  • Page 37 SHB-970 Industrial Full Size CPU Card Secondary Plane Current Value 二级最大瞬时电流值设定,跟超频有关。0 表示 CPU 固有设定值。 3.2.4 SATA Configuration SATA Controller(s) Enable or disable SATA Controllers. SATA Mode Selection Select SATA Mode. [IDE] or [AHCI] IDE Legacy/Native Mode Selection Select IDE Legacy/Native Mode...
  • Page 38 SHB-970 Industrial Full Size CPU Card Serial ATA Port 1~ 4 动态侦测主板上有没有接 SATA 设备,如果对应的 Port 上 有接设备,则显示该 SATA 设备的型号。否则,显示 Empty。 3.2.5 Intel(R) Rapid start Technology Intel(R) Rapid Start Technology Enable or disable Intel Rapid Start Technology. Entry on S3 RTC Wake Intel 快速启动技术需要从...
  • Page 39 SHB-970 Industrial Full Size CPU Card 3.2.6 USB Configuration Legacy USB Support 该项用于设置是否支持 USB 设备启动,即是否加载 DOS 系统下 USB 设备的相关驱动,如 U 盘、 USB 键盘等,就要将此项设为 Enabled 或 Auto。反之则选 Disabled。 USB3.0 Support 支持 USB3.0 EHCI1/2 Controller USB2.0 控制器开关 EHCI Hand-off : (USB2.0 控制权切换)
  • Page 40 SHB-970 Industrial Full Size CPU Card USB Mass Storage Driver Support USB 海量存储驱动程序支持 Port 60/64 Emulation: 即 USB 端口 64/60 仿真设置。当此功能被启用时,USB 键盘可以倒入一些特殊的组合键。 USB transfer time-out: 设置控制、批量、中断传输的超时时间。设置项有 1/5/10/20 秒。默认是 20 秒 。 Device reset time-out: 设置大容量 USB 盘启动命令超时时间。设置项有 10/20/30/40 秒。默认是 20 秒...
  • Page 41 SHB-970 Industrial Full Size CPU Card Parallel Port 此项用于设置打开或关闭并行接口,设置值为[Enabled][Disabled]。 Device Setting(只读) 。 显示并口所占用的中断和地址 Change Setting 此项用于改变并口的资源设置设置,包括地址和中断,建议默认选择 Auto。 Device Mode 此项用来设置并口的工作模式,包括 Standard,EPP,ECP,ECP+EPP 等。 Serial Port 此项用于设置打开或关闭串行接口,设置值为[Enabled] [Disabled]。 Device Setting(只读)...
  • Page 42 SHB-970 Industrial Full Size CPU Card 显示串口的中断和地址。串口 1 默认 3F8/IRQ4,串口 2 默认 2F8/IRQ3。 Change Setting 此项用于改变串口 IO 地址和中断号的设置,默认选择[Auto]。 Serial Port 2 Configuration 设置同上。 3.2.8 H/W Monitor PC Health Status 硬件安全侦测,BIOS 将显示当前的系统温度,CPU 温度,风扇转速,以及其他相关的电压值。以上 参数都有一定的范围,系统不可以超过这些范围运行。 Smart Fan Function : 智能风扇功能控制开关 SYSTIN temperature:...
  • Page 43 SHB-970 Industrial Full Size CPU Card CPUVCORE CPU 电压 : +3.3VIN 3V 电压 : +5VIN 5V 电压 : +12VIN 12V 电压 : 3.2.9 Serial Port Console Redirection...
  • Page 44 SHB-970 Industrial Full Size CPU Card Console Reditection: 控制台重定向,主板支持串口 1,2 控制台重定向,默认 Disable。开启重定向功能一般只需打开 COM1 或者 COM2 重定向,不需要打开 EMS 重定向。 常用选项: 1. Console Redirection:控制台开关选项 2. Terminal Type:终端类型有 VT100/VT100+/ VT-UTF8/ANSI。若终端控制台字符乱码需 要调整此选项,默认 VT100+。 3. Bits per Second: 波特率设置,默认 115200 Windows Emergency Management Services...
  • Page 45 SHB-970 Industrial Full Size CPU Card Windows 紧急管理服务,使管理员能够与通过通常的网络机制不可用的计算机进行交互 的服务。例如,管理员可以通过使用 EMS 重新启动计算机或启动和停止进程和服务。在运行 Windows Server 2008 以前的机器中启用 EMS,需要在 boot.ini 或者使用 BCDEdit 来设置系 统重定向端口的串口号和波特率参数。BIOS EMS 匹配系统 EMS 设置,默认 Disable。开启串 口重定向功能,不需要 Enable EMS 重定向。 常用设置: 1. Out-of-Band Mgmt Port: 串口号设置 2. Terminal Type: 终端字符类型设置。终端类型有 VT100/VT100+/ VT-UTF8/ANSI。若终端...
  • Page 46 SHB-970 Industrial Full Size CPU Card 3.2.10 CPU PPM Configuration EIST 智能降频技术,它能够根据不同的系统工作量自动调节处理器的电压和频率,以减少耗电量和发热 量。默认 Enable。 CPU C1E/C3/C6/C7 Report Intel CPU 深度节能技术,能显著降低处理器空闲期间功耗的一种电源管理技术。数字越大越省电,但 处理器回到 C0 活跃状态相应唤醒时间越长。 Config TDP LOCK TDP 热功耗是反应一颗处理器热量释放的基本物理指标。TDP 的英文全称是“Thermal Design Power”,即热量设计功耗。此选项表示是否锁定 TDP 寄存器。 Long duration power limit 长时间 TDP 限制(瓦)。从功耗角度设定 TDP,设置范围 0-255W。0 代表 CPU 固有设置。...
  • Page 47 SHB-970 Industrial Full Size CPU Card Long duration maintained Long Duration maintained(ms):长时间 TDP 限制(毫秒)。从时间角度设定 TDP,设置范围 0- 32000 毫秒(32 秒)。 0 代表 CPU 固有设置。 Short duration power limit 短时间 TDP 限制(瓦)。从功耗角度设定短时间 TDP,设置范围 0-255W。这是设置 Turbo Boost 可 以在短时间内超出 TDP 限制,但是不能超过这个功耗。 0 代表 CPU 固有设置。...
  • Page 48 SHB-970 Industrial Full Size CPU Card 北桥配置信息。 South Bridge 南桥配置信息。 3.3.1 North Bridge VT-d Intel 的 I/O 虚拟技术,需要芯片组支持,所以有的芯片组支持,有的不支持。BIOS 会根据不同芯片 组显示或隐藏该选项,安装虚拟机时请开启。 DVMT Pre-Allocated : 内置显卡专用显存。 DVMT Total Gfx Mem : 内置显卡共享显存。 Primary Display : 选择优先启动的显示设备类型。...
  • Page 49 SHB-970 Industrial Full Size CPU Card Internal Graphics 集成显卡的控制。 3.3.2 South Bridge Audio Controller 该项用于设置是否打开板载声卡,Enabled 为打开,Disabled 为关闭。 LAN1/2 Controller 该项用于设置是否打开板载网卡 LAN1/2,Enabled 为打开,Disabled 为关闭。 Wake on Lan 此项用于设置是否允许网络唤醒,设置值有[Enabled ][Disabled] 。 Restore AC Power Loss 该项用于设置加电后的开机情况,选 Power Off 则加电后需按下电源键才能开机,选 Power On 则加...
  • Page 50 SHB-970 Industrial Full Size CPU Card 3.4 Boot 菜单 Setup Prompt Timeout 按 Setup 快捷键的等待时间。如果在设置时间内没有按 Setup 快捷键就继续启动。 Bootup Numlock State 此功能允许在系统上电至 DOS 系统后激活小键盘的数字锁功能。默认值为 On 即系统启动时处于数字 锁开。设为 Off,启动时小键盘处于光标控制状态。 Show Full Logo 开机画面控制选项。 默认值[Enabled],显示开机画面。 Boot Option Priorities 系统将按照设定好的顺序来检测设备,直到找到一个能启动的设备,然后从这个设备启动。启动选项 中#1 是最优先的启动设备。...
  • Page 51 SHB-970 Industrial Full Size CPU Card Hard Drive BBS Priorities 该项里包含有可以作为启动设备的硬盘,如果有多个硬盘,应在该项里选择这些硬盘的优先顺序,最 优先的硬盘会显示在 Boot Option #1 里。 3.5 Security 菜单 最小长度为 1,最大长度为 20。 密码字符长度提示: Administrator Password 该提示行用来设置超级用户密码。 User Password 提示行用来设置普通用户密码。...
  • Page 52 SHB-970 Industrial Full Size CPU Card 3.6 Save&Exit 菜单 Load Defaults 此选项用于选择是否恢复 BIOS 默认设置。 Save Changes and Exit 保存 BIOS 设置并退出设置界面,重新启动计算机。 Discard Changes and Exit 放弃更改并退出设置界面,重新启动计算机。 Boot Override 选择指定 Boot 的设备,比如 SATA 硬盘,U 盘,EFI Shell,PXE 等,直接 Boot, 不用保存退出,按 F11 选择指定设备 Boot。...
  • Page 53 附 录...
  • Page 54: Watchdog Timer

    SHB-970 工业级全长 CPU 卡 附 录 附一:Watchdog 编程指引 -------------------------------------------------------------------------------------------------------------------------- watchdog 参考代码(C) 我们可以操作端口来实现对看门狗的操作。在 C 语言下可以通过对相应端口写数据 来操作端口,实现 Watchdog Timer 的不同功能。 端口说明: void main() int indexp = 0x2e,datap = 0x2f; unsigned char temp; Outportb(indexp,0x87); Outportb(indexp,0x87); //unlock Outportb(indexp,0x2d); temp = (unsigned char) inportb (datap);...
  • Page 55 SHB-970 工业级全长 CPU 卡 附二:术语表 ACPI 高级配置和电源管理。ACPI 规范允许操作系统控制计算机及其附加设备的大部分电能。 BIOS 基本输入/输出系统。是在 PC 中包含所有的输入/输出控制代码界面的软件。它在系统启动时进行硬件 检测,开始操作系统的运作,在操作系统和硬件之间提供一个界面。BIOS 是存储在一个只读存储器 芯片内。 总线。在计算机系统中,不同部件之间交换数据的通道,是一组硬件线路。我们所指的 BUS 通常是 CPU 和主内存元件内部的局部线路。 Chipset 芯片组。是为执行一个或多个相关功能而设计的集成芯片。我们指的是由南桥和北桥组成的系统级芯 片组,他决定了主板的架构和主要功能。 CMOS 互补金属-氧化物半导体。是一种被广泛应用的半导体类型。它具有高速、低功耗的特点。我们指的 CMOS 是在主板上的 CMOS RAM 中预留的一部分空间,用来保存日期、时间、系统信息和系统参数 设定信息等。 串口。一种通用的串行通信接口,一般采用标准 DB 9 公头接口连接方式。 DIMM 双列直插式内存模块。是一个带有内存芯片组的小电路板。提供 64bit 的内存总线宽度 。...
  • Page 56 SHB-970 工业级全长 CPU 卡 Inter-Integrated Circuit 总线是一种由 PHILIPS 公司开发的两线式串行总线,用于连接微控制器及其 外围设备。 局域网络接口。一个小区域内相互关联的计算机组成的一个计算机网络,一般是在一个企事业单位或 一栋建筑物。局域网一般由服务器、工作站、一些通信链接组成,一个终端可以通过电线访问数据和 设备的任何地方,许多用户可以共享昂贵的设备和资源。 发光二极管,一种半导体设备,当电流流过时它会被点亮,通常用来把信息非常直观的表示出来,例 如表示电源已经导通或硬盘驱动器正在工作等。 即插即用。允许 PC 对外接设备进行自动配置,不用用户手动操作系统就可以自己工作的一种规格。 为实现这个特点,BIOS 支持 PnP 和一个 PnP 扩展卡都是必需的。 POST 上电自检。在启动系统期间,BIOS 会对系统执行一个连续的检测操作,包括检测 RAM,键盘,硬盘 驱动器等,看它们是否正确连接和是否正常工作。 PS/2 由 IBM 发展的一种键盘和鼠标连接的接口规范。PS/2 是一个仅有 6PIN 的 DIN 接口,也可以用以连 接其他的设备,比如调制解调器。 通用串行总线。一种适合低速外围设备的硬件接口,一般用来连接键盘、鼠标等。一台 PC 最多可以...

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