ICS TRIPLEX 9300/9832/9802底板
您的例程通過了校驗和測試，這確保該例程真正的目的是在通電時接受控制。有關使用ROMboot功能的完整詳細信息，請參閱摩托羅拉68K CISC CPU用戶手冊調試包。網絡引導網絡自動引導是172Bug中包含的一個軟件例程提供引導操作系統機制的閃存/可編程只讀存儲器使用網絡（本地以太網接口）作為引導設備。網絡自動引導例程自動掃描中的控制器和設備指定的序列，直到包含引導媒體的有效可引導設備找到或直到列表用盡。
ICS TRIPLEX 9300/9832/9802底板如果找到有效的可引導設備，則從該設備啟動。控制器掃描序列開始從檢測到的最低控制器邏輯單元號（LUN）到檢測到最高的LUN。（有關默認LUN，請參閱附錄C。）通電時，啟用網絡引導（前提是驅動器和遇到的控制器編號有效）以下消息無效：在系統控制臺上顯示：正在進行網絡引導。。。中止命中<中斷>在該消息之后，有一個延遲允許您中止自動引導過程如果你愿意的話。然后開始實際的輸入/輸出：程序指向指定媒體的卷ID加載到RAM和控件中傳遞給它。然而，如果在此期間，您希望在沒有網絡啟動時，您可以按<BREAK>鍵或軟件中止或重置開關。網絡自動引導由NIOT中包含的參數控制和ENV命令。這些參數允許選擇特定的引導設備、系統和文件，并允許對引導延遲進行編程。有關更多詳細信息，請參閱第3章中的ENV命令描述。重新啟動系統2可以通過三種不同的方式將系統初始化為已知狀態：重置、中止和中斷。每種方法都有各自的特點在某些情況下比其他人更合適。重置期間可以訪問特殊的調試器功能。此功能指示調試器在中使用默認設置/操作參數ROM，而不是NVRAM中您自己的設置/操作參數。到激活此功能時，按下同一時間。如果您的設置/操作參數已損壞或不符合健全性檢查。有關ROM，請參閱第3章中的ENV命令說明默認值。
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.
