GE燃机 DS200TCPSG1A控制卡件
使用PFLASH命令将内容写入闪存，如下所示：162 Bug>PFLASH FF800000:80000 FFA00000然后在J22引脚9和10处重新安装跳线。（162Bug始终从内存位置FF800000执行；J22的状态决定该位置是在PROM还是闪存中。）Autoboot Autoboot是一个包含在162Bug flash/PROM中的软件例程，为启动操作系统提供独立机制。此自动引导例程按指定顺序自动扫描控制器和设备，直到找到包含引导介质的有效可引导设备或列表用尽。如果找到有效的可引导设备，则启动该设备的引导。控制器扫描顺序从检测到的最低控制器逻辑单元号（LUN）到检测到的最高LUN。附录B中列出了控制器、设备及其LUN。通电时，自动引导已启用，如果遇到的驱动器和控制器编号有效，系统控制台上将显示以下消息：自动引导正在进行。。。中止点击此消息后会有一个延迟，以便您有机会根据需要中止Autoboot进程。然后开始实际的I/O：在指定介质的卷ID内指向的程序被加载到RAM中，并将控制权传递给它。但是，如果在此期间您想在没有Autoboot的情况下获得控制权，您可以按键或软件ABORT或RESET开关。3-10计算机组文献中心网站调试器一般信息3 Autoboot由ENV命令中包含的参数控制。这些参数允许选择特定的引导设备和文件，并允许对引导延迟进行编程。有关详细信息，请参阅第5章中的ENV命令！警告：尽管流式磁带可以用于自动引导，但必须将相同的电源连接到流式磁带驱动器、控制器和MVME162FX。通电时，磁带控制器会将流式磁带定位到可以正确读取和使用卷ID的加载点。但是，如果MVME162FX控制器断电，但磁带控制器没有断电，并且磁带恰好处于加载点，则无法将所需的命令序列（连接和倒带）提供给控制器，自动引导将不会成功。ROMboot出厂时，162Bug占据了闪存的前一半。这将使闪存的后半部分和PROM插槽（U47）可供您使用。如果您的应用程序需要所有闪存，则PROM中也可以使用162Bug。请联系您的摩托罗拉销售办事处寻求帮助。该功能由环境（ENV）命令（参考第5章）配置/启用，并在加电时（也可在复位时）或RB命令执行，前提是内存设备（或模块或VMEbus上的其他位置）中有有效代码支持该功能。如果安装了ROMboot代码，则会提供用户编写的例程控制（如果例程满足格式要求）。ROMboot的一个用途可能是在非智能控制器模块上重置SYSFAIL*。NORB命令禁用该功能。用户的ROMboot模块要通过ROMboot链接获得控制，必须满足四个要求：❏ 必须刚刚通电（但ENV命令可以更改此设置，以响应任何重置）。网络引导http://www.mcg.mot.com/literature 3-11 3 ❏ 您的例程必须位于MVME162FX Flash/PROM内存映射中（但ENV命令可以将其更改为板载内存的任何其他部分，甚至是板外VMEbus
contents to flash memory with the PFLASH command as follows: 162-Bug> PFLASH FF800000:80000 FFA00000 Then reinstall the jumper at J22 pins 9 and 10. (162Bug always executes from memory location FF800000; the state of J22 determines whether that location is in PROM or flash.) Autoboot Autoboot is a software routine that is contained in the 162Bug Flash/PROM to provide an independent mechanism for booting an operating system. This autoboot routine automatically scans for controllers and devices in a specified sequence until a valid bootable device containing a boot media is found or the list is exhausted. If a valid bootable device is found, a boot from that device is started. The controller scanning sequence goes from the lowest controller Logical Unit Number (LUN) detected to the highest LUN detected. Controllers, devices, and their LUNs are listed in Appendix B. At power-up, Autoboot is enabled, and providing the drive and controller numbers encountered are valid, the following message is displayed upon the system console: Autoboot in progress... To abort hit Following this message there is a delay to allow you an opportunity to abort the Autoboot process if you wish. Then the actual I/O is begun: the program pointed to within the volume ID of the media specified is loaded into RAM and control passed to it. If, however, during this time you want to gain control without Autoboot, you can press the key or the software ABORT or RESET switches. 3-10 Computer Group Literature Center Web Site Debugger General Information 3 Autoboot is controlled by parameters contained in the ENV command. These parameters allow the selection of specific boot devices and files, and allow programming of the Boot delay. Refer to the ENV command in Chapter 5 for more details. ! Caution Although streaming tape can be used to autoboot, the same power supply must be connected to the streaming tape drive, controller, and the MVME162FX. At power-up, the tape controller will position the streaming tape to load point where the volume ID can correctly be read and used. If, however, the MVME162FX controller loses power but the tape controller does not, and the tape happens to be at load point, the sequences of commands required (attach and rewind) cannot be given to the controller and autoboot will not be successful. ROMboot As shipped from the factory, 162Bug occupies the first half of the flash memory. This leaves the second half of the flash memory and the PROM socket (U47) available for your use. The 162Bug is also available in PROM if your application requires all of the Flash memory. Contact your Motorola sales office for assistance. This function is configured/enabled by the Environment (ENV) command (refer to Chapter 5) and executed at power-up (optionally also at reset) or by the RB command assuming there is valid code in the memory devices (or optionally elsewhere on the module or VMEbus) to support it. If ROMboot code is installed, a userwritten routine is given control (if the routine meets the format requirements). One use of ROMboot might be resetting SYSFAIL* on an unintelligent controller module. The NORB command disables the function. For a user’s ROMboot module to gain control through the ROMboot linkage, four requirements must be met: ❏ Power must have just been applied (but the ENV command can change this to also respond to any reset). Network Boot http://www.mcg.mot.com/literature 3-11 3 ❏ Your routine must be located within the MVME162FX Flash/PROM memory map (but the ENV command can change this to any other portion of the onboard memory, or even offboard VMEbus
