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微软和英特尔总是走在一起的,不久前它们又合作推出了PC991.0版,还得到Compaq,Dell,Gate-way,HP的大力支持。微软提交PC99是为了1999到2000年这段时间内的新硬件能符合“DesignedforMicrosoftWindows”,这些标准设备将用于Windows98和Win-dows2000,与之兼容并通过WHQL测试的产品才能获得市场认可。PC99包括了OnNow,ACPI,立即可用PC,USB和IEEE1394的新规范,WfM和ZAM都能有效地降低TCO。以下是各种类型的PC99系统,它们的配置都比PC98要高:一、PC99一般系统1、系统性能:128K二级缓存的300MHz处理器,32MB内存（家用）或64MB内存（商用）。2、ACPI和BIOS支持:BIOS需支持ACPI及所有类型的USB键盘和集线器。3、总线和扩充能力:二个USB端口（其中一个为移动式PC而设计）;PCI2.1,Vaux支持,在系统S3或总线B3时使用总线上的子系统ID需求把移动式能源提供给设备;由于ISA一直是相容问题的主要原因,PC99终于决定把它彻底淘汰,新系统将没有ISA扩展设
Microsoft and Intel are always together, not long ago they co-launched the PC991.0 version, but also by Compaq, Dell, Gate-way, HP’s strong support. Microsoft submitted PC99 for the first time in 1999-2000 that the new hardware meets “Designed for Microsoft Windows,” and these standard devices will be available for Windows 98 and Win-dows2000, compatible and WHQL-tested products for market acceptance. The PC99 includes OnNow, ACPI, the new specification for ready-to-use PCs, USB and IEEE1394, both WfM and ZAM effectively reducing TCO. The following are various types of PC99 systems, their configuration is higher than the PC98: First, the PC99 general system 1, the system performance: 128K L2 cache 300MHz processor, 32MB memory (home) or 64MB memory (commercial). 2, ACPI and BIOS support: BIOS must support ACPI and all types of USB keyboards and hubs. Bus and Expansion Capabilities: Two USB ports (one designed for mobile PCs); PCI 2.1, Vaux support, subsystem ID on the bus for system S3 or bus B3 Equipment; As ISA has always been the main reason for compatibility issues, PC99 finally decided to completely eliminate it, the new system will not have ISA expansion