BENTLY 1900/55 1900/55-0Z-01-01-01框架MVME177前面板上有八個(gè)LED：FAIL、STAT、，RUN、SCON、LAN、+12V（LAN電源）、SCSI和VME。這個(gè)每個(gè)LED的用途如下：? BRDFAIL時(shí)，紅色故障LED（DS1的一部分）亮起信號(hào)線激活? MC68060狀態(tài)行在MVME177上解碼為驅(qū)動(dòng)黃色STAT（status）LED（DS1的一部分）。在這種情況下，來(lái)自處理器的暫停條件將點(diǎn)亮LED? 當(dāng)本地總線連接時(shí)，綠色運(yùn)行LED（DS2的一部分）亮起TIP*信號(hào)線低。
BENTLY 1900/55 1900/55-0Z-01-01-01框架這表示本地總線之一主機(jī)正在執(zhí)行本地總線循環(huán)? 當(dāng)出現(xiàn)以下情況時(shí)，綠色SCON LED（DS2的一部分）亮起MVME177中的VMEchip2是VMEbus系統(tǒng)控制器? 當(dāng)LAN芯片啟動(dòng)時(shí)，綠色LAN LED（DS3的一部分）亮起是本地總線主節(jié)點(diǎn)? MVME177向以太網(wǎng)提供+12V電源通過(guò)保險(xiǎn)絲的收發(fā)器接口。綠色+12V（LAN電源）LED（DS3的一部分）在電源可用時(shí)亮起收發(fā)器接口? 當(dāng)SCSI芯片啟動(dòng)時(shí)，綠色SCSI LED（DS4的一部分）亮起是本地總線主節(jié)點(diǎn)? 當(dāng)電路板啟動(dòng)時(shí)，綠色VME LED（DS4的一部分）亮起使用VMEbus（VMEbus AS*由VMEchip2）或當(dāng)VMEbus訪問(wèn)電路板時(shí)（VMEchip2是本地總線主）內(nèi)存映射關(guān)于記憶有兩種可能的觀點(diǎn)地圖：? 本地總線主節(jié)點(diǎn)查看的所有資源的映射（本地總線內(nèi)存映射）? VMEbus查看的車(chē)載資源映射主機(jī)（VMEbus內(nèi)存映射）本地總線內(nèi)存映射本地總線內(nèi)存映射通過(guò)以下方式拆分為不同的地址空間：傳輸類(lèi)型（TT）信號(hào)。當(dāng)?shù)刭Y源對(duì)正常訪問(wèn)和中斷確認(rèn)代碼。VMEchip2中有一些地址轉(zhuǎn)換功能。這允許在同一VMEbus上使用不同的不同VMEbus主機(jī)查看的虛擬本地總線圖
There are eight LEDs on the MVME177 front panel: FAIL, STAT,
RUN, SCON, LAN, +12V (LAN power), SCSI, and VME. The
purpose of each LED is as follows:
? The red FAIL LED (part of DS1) lights when the BRDFAIL
signal line is active
? The MC68060 status lines are decoded, on the MVME177, to
drive the yellow STAT (status) LED (part of DS1). In this case,
a halt condition from the processor lights the LED
? The green RUN LED (part of DS2) lights when the local bus
TIP* signal line is low. This indicates one of the local bus
masters is executing a local bus cycle
? The green SCON LED (part of DS2) lights when the
VMEchip2 in the MVME177 is the VMEbus system controller
? The green LAN LED (part of DS3) lights when the LAN chip
is local bus master
? The MVME177 supplies +12V power to the Ethernet
transceiver interface through a fuse. The green +12V (LAN
power) LED (part of DS3) lights when power is available to
the transceiver interface
? The green SCSI LED (part of DS4) lights when the SCSI chip
is local bus master
? The green VME LED (part of DS4) lights when the board is
using the VMEbus (VMEbus AS* is asserted by the
VMEchip2) or when the board is accessed by the VMEbus
(VMEchip2 is the local bus master)Memory Maps
There are two possible perspectives or points of view for memory
maps:
? The mapping of all resources as viewed by local bus masters
(local bus memory map)
? The mapping of onboard resources as viewed by VMEbus
Masters (VMEbus memory map)
Local Bus Memory Map
The local bus memory map is split into different address spaces by
the transfer type (TT) signals. The local resources respond to the
normal access and interrupt acknowledge codes.
There is some address translation capability in the VMEchip2. This
allows multiple MVME177s on the same VMEbus with different
virtual local bus maps as viewed by different VMEbus masters
