ICS TRIPLEX T8160控制模塊,T8160使用范圍
背板電源連接MVME187需要從VMEbus背板。P2還用于32位傳輸，對于擴展的尋址模式。MVME187可能無法正常工作主板未連接到VMEbus的P1和P2背板。
內存地址范圍MVME187是作為VMEbus主機還是作為VMEbus從機，配置為32位地址和32位數據（A32/D32）。然而，它處理A16或A24設備某些地址范圍。系統中的D8和/或D16設備必須由MC88100軟件處理。請參閱中的內存映射中列出的單板計算機程序員參考指南第1章中的相關文件。
ICS TRIPLEX T8160控制模塊DRAM尋址MVME187包含共享板載DRAM，其基座地址可由軟件選擇。車載處理器和非車載VMEbus設備在基本物理位置查看此本地DRAM地址$00000000，由MVME187Bug編程固件。這可以通過軟件更改為任何其他基礎住址參考單板計算機程序員參考詳細信息指南。全局總線超時如果MVME187試圖以不存在的方式訪問非車載資源位置，并且不是系統控制器，如果系統沒有如果全局總線超時，MVME187將永遠等待VMEbus循環完成。這將導致系統掛起向上的多模塊框架配置可以將多個MVME187配置到單個VME卡中籠子通常，支持硬件多處理器功能。GCSR位置監視器寄存器VMEbus上的其他MPU可以中斷、禁用、通信并確定RISC處理器的運行狀態。GCSR集的一個寄存器包括四個位，其功能如下位置監視器允許一個MVME187處理器廣播信號發送至其他MVME187處理器（如有）。全部八個GCSR寄存器可以從任何本地處理器以及VMEbus。以太網LAN（+12 Vdc）保險絲MVME187為以太網LAN提供+12 Vdc電源收發器接口，通過位于MVME187。當+12 Vdc可用時，+12V LED亮起。這個
保險絲是插入式的，位于二極管CR1附近接頭P1。如果以太網收發器無法工作，請檢查
保險絲使用MVME712M過渡模塊時，黃色當LAN通電時，MVME712M前面板上的LED（DS1）亮起可用，表明保險絲良好。
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.
