BENTLY 135613-02监测器模块,135613-02使用参数
可以通过多种方式配置布线，以适应各种设备和系统配置。
图1-23显示了一种可能的配置。有关更多详细信息有关安装P2适配器板和的信息
MVME761过渡模块，请参阅中列出的用户手册附录D，相关文件。
7.更换机箱或系统护盖，确保没有电缆损坏挤压。用电缆将外围设备连接到面板连接器，然后重新连接将系统接至交流或直流电源，并转动设备打开电源。
BENTLY 135613-02监测器模块注：并非所有外围电缆都随MVME761提供。你可能需要制造或购买某些电缆。最小化辐射，摩托罗拉建议外围设备使用屏蔽电缆尽可能连接。系统注意事项
MVME2700从VMEbus背板连接器P1供电和P2。P2还用于32位传输中的高16位数据，以及
对于扩展寻址模式中的上八个地址行。这个如果未连接主板，MVME2700可能无法正常工作至VMEbus背板连接器P1和P2。
MVME2700是作为VMEbus主机还是作为VMEbus运行从机，配置为32位地址和32位数据（A32/D32）。然而，它处理地址范围内的A16或A24设备。D8和/或D16系统中的设备必须由PowerPC处理器处理软件请参阅第2章操作说明中的内存映射。MVME2700包含共享板载DRAM和辅助缓存基址可由软件选择的存储器。船上的两个处理器和非车载VMEbus设备在基座上看到此本地DRAM物理地址$00000000，由固件编程。这可能是通过软件更改为任何其他基址。请参阅MVME2600/2700系列单板计算机程序员有关更多信息，请参阅指南。如果MVME2700试图以不存在的方式访问非车载资源位置，并且不是系统控制器，如果系统没有全局总线超时，MVME2700永远等待VMEbus周期完成。这会导致系统锁定。只有一种情况当系统可能缺少此全局总线超时时：当MVME2700不是系统控制器，并且在中的其他位置没有全局总线超时系统。可以在单个VME机箱中安装多个MVME2700。在里面一般支持硬件多处理器功能。VMEbus上的其他MPU可以中断、禁用、与、，并确定处理器的操作状态。一个GCSR（全局控制/状态寄存器）集包括四个位，其功能如下位置监视器允许一个MVME2700处理器广播信号
任何其他MVME2700处理器。所有八个寄存器都可以访问来自任何本地处理器以及VMEbus。
Note The cabling can be configured in a number of ways to
accommodate various device and system configurations.
Figure 1-23 shows one possible configuration. For more detailed
information on installing the P2 adapter board and the
MVME761 transition module, refer to the user’s manual listed in
Appendix D, Related Documentation.
7. Replace the chassis or system cover(s), making sure no cables are
pinched. Cable the peripherals to the panel connectors, reconnect
the system to the AC or DC power source, and turn the equipment
power on.
Note Not all peripheral cables are provided with the MVME761. You
may need to fabricate or purchase certain cables. To minimize
radiation, Motorola recommends shielded cable for peripheral
connections where possible.System Considerations
The MVME2700 draws power from VMEbus backplane connectors P1
and P2. P2 is also used for the upper 16 bits of data in 32-bit transfers, and
for the upper eight address lines in extended addressing mode. The
MVME2700 may not function properly without its main board connected
to VMEbus backplane connectors P1 and P2.
Whether the MVME2700 operates as a VMEbus master or as a VMEbus
slave, it is configured for 32 bits of address and 32 bits of data (A32/D32).
However, it handles A16 or A24 devices in the address ranges. D8 and/or
D16 devices in the system must be handled by the PowerPC processor
software. Refer to the memory maps in Chapter 2, Operating Instructions.
The MVME2700 contains shared onboard DRAM and secondary cache
memory whose base address is software-selectable. Both the onboard
processor and offboard VMEbus devices see this local DRAM at base
physical address $00000000, as programmed by the firmware. This may be
changed via software to any other base address. Refer to the
MVME2600/2700 Series Single Board Computer Programmer’s
Reference Guide for more information.
If the MVME2700 tries to access offboard resources in a nonexistent
location and is not system controller, and if the system does not have a
global bus timeout, the MVME2700 waits forever for the VMEbus cycle
to complete. This causes the system to lock up. There is only one situation
when the system might lack this global bus timeout: when the MVME2700
is not the system controller and there is no global bus timeout elsewhere in
the system.
Multiple MVME2700s may be installed in a single VME chassis. In
general, hardware multiprocessor features are supported.
Other MPUs on the VMEbus can interrupt, disable, communicate with,
and determine the operational status of the processor(s). One register of the
GCSR (global control/status register) set includes four bits that function as
location monitors to allow one MVME2700 processor to broadcast a signal
to any other MVME2700 processors. All eight registers are accessible
from any local processor as well as from the VMEbus.
