EMERSON KJ3243X1-BB1接口卡
扫描从第一个可能的替代图像的位置开始向下执行，并首先搜索POST，然后搜索USER，最后搜索替代MOTLoad图像。在多个相同类型的图像的情况下，控制被传递到扫描中遇到的第一个图像。安全启动，无论是通过在通电复位后的前五秒内按下控制台上的ESC或通过设置安全启动跳线来调用，都会中断扫描过程。然后，用户可以显示可用的引导图像并选择期望的图像。该功能用于在不再需要编程的备用启动映像时启用恢复。以下输出是交互式安全启动的示例：启动序列MOTLoad复位后的固件启动序列为：1。初始化缓存、MMU、FPU和其他CPU内部项。2.初始化内存控制器。3.搜索活动闪存库，可能以交互方式搜索有效的开机自检（POST）图像。如果找到，则执行POST映像。完成后，POST映像返回并继续启动。
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.
