ICS TRIPLEX 9100底板，9100產(chǎn)品尺寸
此消息后面會有一個延遲，以便在實際輸入/輸出開始時中止自動啟動過程：程序指向指定媒體的卷ID加載到RAM中，并通過控制對它。然而，如果在此期間，您希望在沒有Autoboot，您可以按<BREAK>鍵或軟件中止或重置開關(guān)。自動啟動過程由ENV中包含的參數(shù)控制命令這些參數(shù)允許選擇特定的引導設備和文件，并允許啟動延遲編程。
ICS TRIPLEX 9100底板參考ENV有關(guān)更多詳細信息，請參閱第3章中的命令說明。雖然您可以使用流式磁帶自動引導，但相同電源必須連接到磁帶機控制器和MVME172LX。通電時，磁帶然而，如果MVME172LX失去電源，但控制器沒有啟動，控制器將把流式磁帶定位到加載點而磁帶恰好位于加載點不能使用必要的命令序列（附加和回放）給控制器和自動引導將不會成功。羅姆布特出廠時，172Bug占用了安裝在插座XU2。這樣就剩下一個插槽（XU1）和閃存可用供您使用。注意：您可能希望聯(lián)系您的摩托羅拉銷售辦事處以獲取協(xié)助使用這些資源。ROMboot功能通過ENV命令配置/啟用（參見第3章），并在通電時執(zhí)行（也可以在重置時執(zhí)行）。您也可以通過RB命令執(zhí)行ROMboot功能，假設內(nèi)存設備中有有效代碼（或可選）板或VMEbus上的其他位置）來支持它。如果ROMboot代碼為安裝后，將為用戶編寫的例程提供控制（如果該例程滿足格式要求）。ROMboot的一個用途可能是重置SYSFAIL? 上的行非智能控制器模塊。NORB命令將禁用作用用戶的ROMboot模塊通過ROMboot獲得控制聯(lián)動，必須存在四個條件：? 剛剛應用了電源（但ENV命令可以改變這一點也響應任何重置）。? 您的例程位于MVME172LX閃存/PROM中內(nèi)存映射（但ENV命令可以將其更改為任何其他部分板載內(nèi)存，甚至非板載VMEbus內(nèi)存）。
? ASCII字符串“BOOT”位于指定的內(nèi)存范圍內(nèi)。其中可以正確讀取和使用卷ID。
A delay follows this message so that you can abort the Autoboot process if Then the actual I/O begins: 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 <BREAK> key or the software ABORT or
RESET switches.
The Autoboot process 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 description in Chapter 3 for more details.!
Caution
Although you can use streaming tape to autoboot, the same
power supply must be connected to the tape drive, the
controller, and the MVME172LX. At power-up, the tape
controller will position the streaming tape to the load pointHowever, if the MVME172LX loses power but the controller
does not, and the tape happens to be at load point, the
necessary command sequences (attach and rewind) cannot be
given to the controller and the autoboot will not succeed.
ROMboot
As shipped from the factory, 172Bug occupies an EPROM installed in
socket XU2. This leaves one socket (XU1) and the Flash memory available
for your use.
Note You may wish to contact your Motorola sales office for
assistance in using these resources.
The ROMboot function is configured/enabled via the ENV command
(refer to Chapter 3) and is executed at power-up (optionally also at reset).
You can also execute the ROMboot function via the RB command,
assuming there is valid code in the memory devices (or optionally
elsewhere on the board or VMEbus) to support it. If ROMboot code is
installed, a user-written routine is given control (if the routine meets the
format requirements).
One use of ROMboot might be resetting the SYSFAIL? line 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 conditions must exist:
? Power has just been applied (but the ENV command can change this
to also respond to any reset).
? Your routine is located within the MVME172LX Flash/PROM
memory map (but the ENV command can change this to any other
portion of the onboard memory, or even offboard VMEbus
memory).
? The ASCII string "BOOT" is found in the specified memory range.
where the volume ID can correctly be read and used.
