ICS TRIPLEX 9300/9832/9802底板

您的例程通过了校验和测试，这确保该例程真正的目的是在通电时接受控制。有关使用ROMboot功能的完整详细信息，请参阅摩托罗拉68K CISC CPU用户手册调试包。网络引导网络自动引导是172Bug中包含的一个软件例程提供引导操作系统机制的闪存/可编程只读存储器使用网络（本地以太网接口）作为引导设备。网络自动引导例程自动扫描中的控制器和设备指定的序列，直到包含引导媒体的有效可引导设备找到或直到列表用尽。

ICS TRIPLEX 9300/9832/9802底板如果找到有效的可引导设备，则从该设备启动。控制器扫描序列开始从检测到的最低控制器逻辑单元号（LUN）到检测到最高的LUN。（有关默认LUN，请参阅附录C。）通电时，启用网络引导（前提是驱动器和遇到的控制器编号有效）以下消息无效：在系统控制台上显示：正在进行网络引导。。。中止命中<中断>在该消息之后，有一个延迟允许您中止自动引导过程如果你愿意的话。然后开始实际的输入/输出：程序指向指定媒体的卷ID加载到RAM和控件中传递给它。然而，如果在此期间，您希望在没有网络启动时，您可以按<BREAK>键或软件中止或重置开关。网络自动引导由NIOT中包含的参数控制和ENV命令。这些参数允许选择特定的引导设备、系统和文件，并允许对引导延迟进行编程。有关更多详细信息，请参阅第3章中的ENV命令描述。重新启动系统2可以通过三种不同的方式将系统初始化为已知状态：重置、中止和中断。每种方法都有各自的特点在某些情况下比其他人更合适。重置期间可以访问特殊的调试器功能。此功能指示调试器在中使用默认设置/操作参数ROM，而不是NVRAM中您自己的设置/操作参数。到激活此功能时，按下同一时间。如果您的设置/操作参数已损坏或不符合健全性检查。有关ROM，请参阅第3章中的ENV命令说明默认值。

Your routine passes a checksum test, which ensures that this routine

was really intended to receive control at powerup.

For complete details on using the ROMboot function, refer to the

Debugging Package for Motorola 68K CISC CPUs User’s Manual.

Network Boot

Network Auto Boot is a software routine contained in the 172Bug

Flash/PROM that provides a mechanism for booting an operating system

using a network (local Ethernet interface) as the boot device. The Network

Auto Boot routine automatically scans for controllers and devices in a

specified sequence until a valid bootable device containing boot media is

found or until 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. (Refer to Appendix C for default LUNs.)

At power-up, Network Boot is enabled and (provided that the drive and

controller numbers encountered are valid) the following message is

displayed upon the system console:

Network Boot in progress... To abort hit <BREAK>

After this message, there is a delay to let you abort the Auto Boot 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

Network Boot, you can press the <BREAK> key or the software ABORT

or RESET switches.

Network Auto Boot is controlled by parameters contained in the NIOT

and ENV commands. These parameters allow the selection of specific

boot devices, systems, and files, and allow programming of the Boot delay.

Refer to the ENV command description in Chapter 3 for more details. Restarting the System 2

You can initialize the system to a known state in three different ways:

Reset, Abort, and Break. Each method has characteristics which make it

more suitable than the others in certain situations.

A special debugger function is accessible during resets. This feature

instructs the debugger to use the default setup/operation parameters in

ROM instead of your own setup/operation parameters in NVRAM. To

activate this function, you press the RESET and ABORT switches at the

same time. This feature can be helpful in the event that your

setup/operation parameters are corrupted or do not meet a sanity check.

Refer to the ENV command description in Chapter 3 for the ROM

defaults.