RELIANCE 86466-3R整流器组
前面板连接器VMIVME-7740的前面板连接（包括连接器引脚和方向）在附录A中有详细定义。PMC扩展站点连接器VMIVME-0740提供PMC扩展站点接头，用于添加PMC扩展板。此扩展功能允许第三方设备与VMIVME-7740一起使用，如图2-2所示。LED 1 Therm-（红色）指示CPU温度调节器何时激活。LED 2电源-（Grn）指示板何时通电。LED 3硬盘驱动器指示灯-（Yel）指示硬盘驱动器活动发生的时间。LED 4 SYSFAIL-（红色）指示VMEbus SYSFAIL何时被断言。VMIVME-7740提供了一个完整的IBM PC/AT兼容的基于奔腾III处理器的计算机。该设计包括一个具有当前技术存储器的高速微处理器。有关可用组件选项，请参考VMIC产品规范。由于该设计与PC/AT兼容，它保留了标准的PC内存和I/O映射以及标准的中断架构。此外，VMIVME-7740包括以太网控制器、AGP兼容视频适配器和USB控制器。以下各节详细介绍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
