ABB 086318-501模块使用方法教程
目前由PPCBug支持的磁盘/磁带控制器模块。（默认值=$00）网络自动引导设备LUN=00 请参阅PPCBug固件包用户手册，以获取目前由PPCBug支持的磁盘/磁带控制器模块。（默认值=$00）网络自动引导中止延迟=5？NETboot序列在启动之前延迟的时间（秒）靴子延迟的目的是允许您选择停止使用键启动。时间值为0-255秒。（默认值=5秒）网络自动引导配置参数偏移（NVRAM）=00001000网络接口配置参数的地址保存/保留在NVRAM中；
ABB 086318-501模块使用方法教程这些参数是必要的用于执行无人值守网络引导的参数。典型的偏移可能为1000美元，但该值是特定于应用程序的。如果使用NIOT调试器命令，则需要保存在从$00000000到$00000 FFF的偏移范围内。这个NIOT参数的大小不超过128字节。此环境的设置指针确定其位置。如果您已将相同的空间用于如果您拥有程序信息或命令，它们将被覆盖并丢失。您可以在此中重新定位网络接口配置参数通过使用ENV命令更改网络自动引导配置参数从默认值$00001000偏移到该值您需要清除NVRAM中的数据。此参数的默认设置因车速而异安装在板上的DRAM内存部件。默认设置为在可用的DRAM存储器组上发现的最慢速度这是编程到MPC105“ROMFAL”字段中的值（内存控制配置寄存器8：位23-27）以指示访问ROM时使用的时钟周期数。允许的最低时钟周期数ROMFAL设置为00美元；允许的最高价格为1美元。要输入的值取决于处理器速度。默认值根据系统的总线时钟速度。注：ROM首次访问长度不适用于MVME2600/MVME2700/MVME3600/MVME4600。PPCBUG忽略配置的值。ROM下一个访问长度（0-15）=0？编程到MPC105“ROMNAL”字段中的值（存储器控制配置寄存器8：位28-31），表示半字节（或突发）模式ROM访问的访问时间。最低的允许的ROMNAL设置为$0；允许的最高值为$F输入取决于处理器速度。默认值随时间而变化系统的总线时钟速度。注：ROM下一个访问长度不适用于
MVME2600/MVME2700/MVME3600/MVME4600。PPCBUG忽略配置的值
Refer to the PPCBug Firmware Package User’s Manual for a listing of
disk/tape controller modules currently supported by PPCBug.
(Default = $00)
Network Auto Boot Device LUN = 00?
Refer to the PPCBug Firmware Package User’s Manual for a listing of
disk/tape controller modules currently supported by PPCBug.
(Default = $00)
Network Auto Boot Abort Delay = 5?
The time in seconds that the NETboot sequence delays before starting the
boot. The purpose for the delay is to allow you the option of stopping the
boot by use of the <Break> key. The time value is from 0-255 seconds.
(Default = 5 seconds)
Network Auto Boot Configuration Parameters Offset (NVRAM) =
00001000?
The address where the network interface configuration parameters are to
be saved/retained in NVRAM; these parameters are the necessary
parameters to perform an unattended network boot. A typical offset might
be $1000, but this value is application-specific. If you use the NIOT debugger command, these parameters need to be
saved somewhere in the offset range $00000000 through $00000FFF. The
NIOT parameters do not exceed 128 bytes in size. The setting of this ENV
pointer determines their location. If you have used the same space for your
own program information or commands, they will be overwritten and lost.
You can relocate the network interface configuration parameters in this
space by using the ENV command to change the Network Auto Boot
Configuration Parameters offset from its default of $00001000 to the value
you need to be clear of your data within NVRAM.The default setting for this parameter varies depending on the speed of the
DRAM memory parts installed on the board. The default is set to the
slowest speed found on the available banks of DRAM memoryThis is the value programmed into the MPC105 “ROMFAL” field
(Memory Control Configuration Register 8: bits 23-27) to indicate the
number of clock cycles used in accessing the ROM. The lowest allowable
ROMFAL setting is $00; the highest allowable is $1F. The value to enter
depends on processor speed. The default value varies according to the
system’s bus clock speed.
Note ROM First Access Length is not applicable to the
MVME2600/MVME2700/MVME3600/MVME4600. PPCBUG
ignores the configured value.
ROM Next Access Length (0 - 15) = 0?
The value programmed into the MPC105 “ROMNAL” field (Memory
Control Configuration Register 8: bits 28-31) to represent wait states in
access time for nibble (or burst) mode ROM accesses. The lowest
allowable ROMNAL setting is $0; the highest allowable is $F. The value
to enter depends on processor speed. The default value varies according to
the system’s bus clock speed.
Note ROM Next Access Length is not applicable to the
MVME2600/MVME2700/MVME3600/MVME4600. PPCBUG
ignores the configured value
