UNS0121A-Z,V1说明书文档，ABB模块
ENV–设置环境使用ENV命令以交互方式查看和/或配置所有PPCBug保存在非易失性RAM（NVRAM）中的操作参数。有关说明，请参阅PPCBug固件包用户手册
ENV的使用。Universe II中寄存器的其他信息影响这些参数的ASIC可以在程序员的PowerPC板参考指南。下面列出并描述了您可以配置的参数使用环境。显示的默认值是在以下情况下生效的值：配置PPCBug参数可以使用ENV配置的参数包括：错误或系统环境[B/S]=B？现场服务菜单启用[是/否]=否？B Bug是指没有系统类型支持的模式显示。
UNS0121A-Z,V1说明书文档然而，与系统相关的项目仍然是可获得的（默认）S系统是标准操作模式，是如果NVRAM出现故障，则为默认模式。系统模式为在PPCBug固件包用户手册中定义手动当MVME2600启动时，使用远程启动方法开关/MVME2700/MVME3600/MVME4600从另一个交叉加载基于VME的CPU，开始执行交叉加载的程序。支持的输入/输出控制器的探测系统[是/否]=是？NVRAM头自动初始化启用[是/否]=是？G使用上的全局控制和状态寄存器宇宙II芯片通过并开始执行交叉加载程序。（不适用于MVME4600董事会。）M在中使用多处理器控制寄存器（MPCR）共享RAM以传递并开始执行交叉加载的程序。B使用GCSR和MPCR方法通过并开始执行交叉加载的程序。（默认）N不要使用任何远程启动方法。Y将访问适当的系统总线（例如VMEbus、本地MPU总线）以确定支持的控制器的存在。（默认）N不会访问VMEbus以确定是否存在受支持的控制器。Y NVRAM（准备分区）标头空间将为在电路板初始化期间自动初始化，但前提是PREP分区未通过健全性检查。（默认）N NVRAM标头空间将不会初始化在电路板初始化期间自动
ENV – Set Environment
Use the ENV command to view and/or configure interactively all PPCBug
operational parameters that are kept in Non-Volatile RAM (NVRAM).
Refer to the PPCBug Firmware Package User’s Manual for a description
of the use of ENV. Additional information on registers in the Universe II
ASIC that affect these parameters can be found in the Programmer’s
Reference Guide for your PowerPC board.
Listed and described below are the parameters that you can configure
using ENV. The default values shown are those in effect when this
publication went to print.
Configure the PPCBug Parameters
The parameters that can be configured using ENV are:
Bug or System environment [B/S] = B?
Field Service Menu Enable [Y/N] = N?
B Bug is the mode where no system type of support is
displayed. However, system-related items are still
available. (Default)
S System is the standard mode of operation, and is the
default mode if NVRAM should fail. System mode is
defined in the PPCBug Firmware Package User’s
ManualThe Remote Start Method Switch is used when the MVME2600/
MVME2700/MVME3600/MVME4600 is cross-loaded from another
VME-based CPU, to start execution of the cross-loaded program.
Probe System for Supported I/O Controllers [Y/N] = Y?
Auto-Initialize of NVRAM Header Enable [Y/N] = Y?
G Use the Global Control and Status Register on the
Universe II chip to pass and start execution of the
cross-loaded program. (Not applicable to MVME4600
boards.)
M Use the Multiprocessor Control Register (MPCR) in
shared RAM to pass and start execution of the crossloaded program.
B Use both the GCSR and the MPCR methods to pass
and start execution of the cross-loaded program.
(Default)
N Do not use any Remote Start Method.
Y Accesses will be made to the appropriate system
buses (e.g., VMEbus, local MPU bus) to determine
the presence of supported controllers. (Default)
N Accesses will not be made to the VMEbus to
determine the presence of supported controllers.
Y NVRAM (PReP partition) header space will be
initialized automatically during board initialization,
but only if the PREP partition fails a sanity check.
(Default)
N NVRAM header space will not be initialized
automatically during board initialization
