ICS TRIPLEX T8160控制模块,T8160使用范围
背板电源连接MVME187需要从VMEbus背板。P2还用于32位传输，对于扩展的寻址模式。MVME187可能无法正常工作主板未连接到VMEbus的P1和P2背板。
内存地址范围MVME187是作为VMEbus主机还是作为VMEbus从机，配置为32位地址和32位数据（A32/D32）。然而，它处理A16或A24设备某些地址范围。系统中的D8和/或D16设备必须由MC88100软件处理。请参阅中的内存映射中列出的单板计算机程序员参考指南第1章中的相关文件。
ICS TRIPLEX T8160控制模块DRAM寻址MVME187包含共享板载DRAM，其基座地址可由软件选择。车载处理器和非车载VMEbus设备在基本物理位置查看此本地DRAM地址$00000000，由MVME187Bug编程固件。这可以通过软件更改为任何其他基础住址参考单板计算机程序员参考详细信息指南。全局总线超时如果MVME187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，如果系统没有如果全局总线超时，MVME187将永远等待VMEbus循环完成。这将导致系统挂起向上的多模块框架配置可以将多个MVME187配置到单个VME卡中笼子通常，支持硬件多处理器功能。GCSR位置监视器寄存器VMEbus上的其他MPU可以中断、禁用、通信并确定RISC处理器的运行状态。GCSR集的一个寄存器包括四个位，其功能如下位置监视器允许一个MVME187处理器广播信号发送至其他MVME187处理器（如有）。全部八个GCSR寄存器可以从任何本地处理器以及VMEbus。以太网LAN（+12 Vdc）保险丝MVME187为以太网LAN提供+12 Vdc电源收发器接口，通过位于MVME187。当+12 Vdc可用时，+12V LED亮起。这个
保险丝是插入式的，位于二极管CR1附近接头P1。如果以太网收发器无法工作，请检查
保险丝使用MVME712M过渡模块时，黄色当LAN通电时，MVME712M前面板上的LED（DS1）亮起可用，表明保险丝良好。
Backplane Power Connections
The MVME187 needs to draw power from both P1 and P2 of the
VMEbus backplane. P2 is also used for the upper 16 bits of data for
32-bit transfers, and for the upper 8 address lines for extended
addressing mode. The MVME187 may not operate properly
without its main board connected to P1 and P2 of the VMEbus
backplane.
Memory Address Ranges
Whether the MVME187 operates as a VMEbus master or as a
VMEbus slave, it is configured for 32 bits of address and for 32 bits
of data (A32/D32). However, it handles A16 or A24 devices in
certain address ranges. D8 and/or D16 devices in the system must
be handled by the MC88100 software. Refer to the memory maps in
the Single Board Computer Programmer's Reference Guide as listed in
Related Documentation in Chapter 1.
DRAM Addressing
The MVME187 contains shared onboard DRAM 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 MVME187Bug
firmware. This may be changed, by software, to any other base
address. Refer to the Single Board Computer Programmer's Reference
Guide for details.
Global Bus Timeout
If the MVME187 tries to access offboard resources in a non-existent
location, and is not system controller, and if the system does not
have a global bus timeout, the MVME187 waits forever for the
VMEbus cycle to complete. This would cause the system to hang
up. Multiple Module Cage Configuration
Multiple MVME187s may be configured into a single VME card
cage. In general, hardware multiprocessor features are supported.
GCSR Location Monitor Register
Other MPUs on the VMEbus can interrupt, disable, communicate
with and determine the operational status of the RISC processor(s).
One register of the GCSR set includes four bits which function as
location monitors to allow one MVME187 processor to broadcast a
signal to other MVME187 processors, if any. All eight GCSR
registers are accessible from any local processor as well as from the
VMEbus.
Ethernet LAN (+12 Vdc) Fuse
The MVME187 provides +12 Vdc power to the Ethernet LAN
transceiver interface through a 1-amp fuse (F2) located on the
MVME187. The +12V LED lights when +12 Vdc is available. The
fuse is socketed and is located adjacent to diode CR1 near
connector P1. If the Ethernet transceiver fails to operate, check the
fuse. When using the MVME712M transition module, the yellow
LED (DS1) on the MVME712M front panel lights when LAN power
is available, indicating that the fuse is good.
