PCD2.M48X系统模块,SAIA中文PDF说明书在线阅读
将环境设置为错误/操作系统环境[；[D]]ENV命令允许您以交互方式查看和配置
保留在备用电池中的所有Bug操作参数RAM（BBRAM），也称为非易失性RAM（NVRAM）。这个操作参数保存在NVRAM中，并在任何时候使用断电。
每当错误使用来自NVRAM的参数时，NVRAM内容首先通过校验和进行测试，以确保NVRAM内容。在BBRAM校验和失败的情况下，假设某些默认值如下所述。
PCD2.M48X系统模块错误操作参数（保存在NVRAM中）包括通电/热复位时未自动初始化。这取决于Bug用户调用ENV命令。一旦ENV命令在没有错误、错误默认和/或用户的情况下调用和执行修改后的参数与校验和数据。已确定的操作参数只有在重置/通电条件下，修改才会生效。
如果在命令上没有选项的情况下调用ENV命令第行，系统将提示您配置所有操作参数。如果使用选项D调用ENV命令，ROM默认值将加载到NVRAM中。使用全局控制和中的状态寄存器（GCSR）VMEchip2和多处理器共享中的控制寄存器（MPCR）RAM，传递和启动方法交叉加载程序的执行。将访问VMEbus以确定是否存在受支持的控制器。在之后否定VMEbus SYSFAIL
成功完成或进入错误命令监视器。使无知配置区域（CFGA）块打开硬盘。自动引导功能已禁用。通电时尝试自动引导仅重置。磁盘/磁带控制器模块的LUN当前受错误支持。
默认值为00
Setting Environment to Bug/Operating System
ENV [;[D]]
The ENV command allows you to interactively view and configure
all Bug operational parameters that are kept in Battery Backed Up
RAM (BBRAM), also known as Non-Volatile RAM (NVRAM). The
operational parameters are saved in NVRAM and used whenever
power is lost.
Any time the Bug uses a parameter from NVRAM, the NVRAM
contents are first tested by checksum to insure the integrity of the
NVRAM contents. In the instance of BBRAM checksum failure,
certain default values are assumed as stated below.
The bug operational parameters (which are kept in NVRAM) are
not initialized automatically on power-up/warm reset. It is up to
the Bug user to invoke the ENV command. Once the ENV command
is invoked and executed without error, Bug default and/or user
modified parameters are loaded into NVRAM along with
checksum data. The operational parameters that have been
modified will not be in effect until a reset/power-up condition.
If the ENV command is invoked with no options on the command
line, you are prompted to configure all operational parameters. If
the ENV command is invoked with the option D, ROM defaults will
be loaded into NVRAM. Use both the Global Control and
Status Register (GCSR) in the
VMEchip2, and the Multiprocessor
Control Register (MPCR) in shared
RAM, methods to pass and start
execution of cross-loaded program. Accesses will be made to VMEbus to
determine presence of supported
controllers. Negate VMEbus SYSFAIL after
successful completion or entrance into
the bug command monitor. Enable the ignorance of the
Configuration Area (CFGA) Block on
a hard disk. Auto Boot function is disabled.Auto Boot is attempted at power-up
reset only. LUN of a disk/tape controller module
currently supported by the Bug.
Default is 00
