RELIANCE 86466-3R整流器組
前面板連接器VMIVME-7740的前面板連接（包括連接器引腳和方向）在附錄A中有詳細(xì)定義。PMC擴(kuò)展站點(diǎn)連接器VMIVME-0740提供PMC擴(kuò)展站點(diǎn)接頭，用于添加PMC擴(kuò)展板。此擴(kuò)展功能允許第三方設(shè)備與VMIVME-7740一起使用，如圖2-2所示。LED 1 Therm-（紅色）指示CPU溫度調(diào)節(jié)器何時(shí)激活。LED 2電源-（Grn）指示板何時(shí)通電。LED 3硬盤驅(qū)動(dòng)器指示燈-（Yel）指示硬盤驅(qū)動(dòng)器活動(dòng)發(fā)生的時(shí)間。LED 4 SYSFAIL-（紅色）指示VMEbus SYSFAIL何時(shí)被斷言。VMIVME-7740提供了一個(gè)完整的IBM PC/AT兼容的基于奔騰III處理器的計(jì)算機(jī)。該設(shè)計(jì)包括一個(gè)具有當(dāng)前技術(shù)存儲(chǔ)器的高速微處理器。有關(guān)可用組件選項(xiàng)，請(qǐng)參考VMIC產(chǎn)品規(guī)范。由于該設(shè)計(jì)與PC/AT兼容，它保留了標(biāo)準(zhǔn)的PC內(nèi)存和I/O映射以及標(biāo)準(zhǔn)的中斷架構(gòu)。此外，VMIVME-7740包括以太網(wǎng)控制器、AGP兼容視頻適配器和USB控制器。以下各節(jié)詳細(xì)介紹VMIVME-7740的PC/AT功能
Front Panel Connectors The front panel connections, including connector pinouts and orientation, for the VMIVME-7740 are defined in detail in Appendix A. PMC Expansion Site Connectors The VMIVME-7740 supplies the PMC expansion site connector for adding a PMC expansion board. This expansion capability allows third-party devices to be used with the VMIVME-7740, as shown in Figure 2-2.LED 1 Therm - (Red) Indicates when the CPU Temperature Throttle is active. LED 2 Power - (Grn)Indicates when power is applied to the board. LED 3 Hard Drive Indicator - (Yel) Indicates when hard drive activity is occurring. LED 4 SYSFAIL - (Red) Indicates when a VMEbus SYSFAIL is asserted.The VMIVME-7740 provides a complete IBM PC/AT-compatible Pentium III processor-based computer. The design includes a high-speed microprocessor with current technology memory. Reference the VMIC product specifications for available component options. Because the design is PC/AT compatible, it retains standard PC memory and I/O maps along with standard interrupt architecture. Furthermore, the VMIVME-7740 includes Ethernet controllers, an AGP-compatible video adapter, and a USB controller. The following sections describe in detail the PC/AT functions of the VMIVME-7740
