EMERSON KJ3243X1-BB1接口卡
掃描從第一個可能的替代圖像的位置開始向下執(zhí)行，并首先搜索POST，然后搜索USER，最后搜索替代MOTLoad圖像。在多個相同類型的圖像的情況下，控制被傳遞到掃描中遇到的第一個圖像。安全啟動，無論是通過在通電復位后的前五秒內(nèi)按下控制臺上的ESC或通過設置安全啟動跳線來調(diào)用，都會中斷掃描過程。然后，用戶可以顯示可用的引導圖像并選擇期望的圖像。該功能用于在不再需要編程的備用啟動映像時啟用恢復。以下輸出是交互式安全啟動的示例：啟動序列MOTLoad復位后的固件啟動序列為：1。初始化緩存、MMU、FPU和其他CPU內(nèi)部項。2.初始化內(nèi)存控制器。3.搜索活動閃存庫，可能以交互方式搜索有效的開機自檢（POST）圖像。如果找到，則執(zhí)行POST映像。完成后，POST映像返回并繼續(xù)啟動。
The scan is performed downwards beginning at the location of the first possible alternate
image and searches first for POST, then USER, and finally Alternate MOTLoad images. In
the case of multiple images of the same type, control is passed to the first image
encountered in the scan.
Safe Start, whether invoked by hitting ESC on the console within the first five seconds
following power-on reset or by setting the Safe Start jumper, interrupts the scan process.
The user may then display the available boot images and select the desired image. The
feature is provided to enable recovery in cases when the programmed Alternate Boot
Image is no longer desired. The following output is an example of an interactive Safe Start:Startup Sequence
The firmware startup sequence following reset of MOTLoad is to:
1. Initialize cache, MMU, FPU, and other CPU internal items.
2. Initialize the memory controller.
3. Search the active flash bank, possibly interactively, for a valid Power On Self Test
(POST) image. If found, the POST images executes. Once completed, the POST
image returns and startup continues.
