RELIANCE 805401-3S電源PMI處理器
物理存儲(chǔ)器VMIVME-7740提供同步DRAM（SDRAM）作為板載系統(tǒng)存儲(chǔ)器。內(nèi)存可以以字節(jié)、單詞或長(zhǎng)單詞的形式訪問(wèn)。VMIVME-7740上的所有RAM都通過(guò)PCI到VME橋雙端口到VMEbus。內(nèi)存可由本地處理器尋址，也可由另一個(gè)VMEbus主機(jī)尋址VMEbus從屬接口。在本地處理器和VMEbus之間共享內(nèi)存時(shí)必須小心，以防止VMEbus主機(jī)覆蓋本地處理器的操作系統(tǒng)。注意：在Windows NT 4.0中使用I/O Works Access的Configure實(shí)用程序配置RAM時(shí)，請(qǐng)不要請(qǐng)求超過(guò)25%的物理RAM。超過(guò)25%的限制可能會(huì)導(dǎo)致已知的Windows NT錯(cuò)誤。這可能會(huì)在Windows NT啟動(dòng)過(guò)程中導(dǎo)致不可預(yù)測(cè)的行為，需要使用緊急修復(fù)盤來(lái)恢復(fù)計(jì)算機(jī)。Windows NT 4.0 service pack級(jí)別3中存在此錯(cuò)誤。
Physical Memory The VMIVME-7740 provides Synchronous DRAM (SDRAM) as on-board system memory. Memory can be accessed as bytes, words, or longwords. All RAM on the VMIVME-7740 is dual-ported to the VMEbus through the PCI-to-VME bridge. The memory is addressable by the local processor, as well as the VMEbus slave interface by another VMEbus master. Caution must be used when sharing memory between the local processor and the VMEbus to prevent a VMEbus master from overwriting the local processor’s operating system. NOTE: When using the Configure utility of I/O Works Access with Windows NT 4.0 to configure RAM, do not request more than 25 percent of the physical RAM. Exceeding the 25 percent limit may result in a known Windows NT bug. This may cause unpredictable behavior during the Windows NT boot sequence, requiring the use of an emergency repair disk to restore the computer. The bug is present in Windows NT 4.0 service pack level 3.
