1-2User’s Guide1.1 Major FeaturesThe system board has the following major features:• A zero-insertion force (ZIF) socket for Intel P54C and P55C, CyrixM1/M2, or AMD K5/K6• Two DRAM banks composed of four 72-pin SIMM sockets thatsupport 4/8/16/32-MB 60/70ns SIMMs• 256-KB or 512-KB write-back pipeline burst second-level cache(manufacturing option)• 256-KB boot block mode Flash ROM for system BIOS, VGABIOS, and PnP ESCD• Two PCI-enhanced IDE interfaces that support up to four IDEdevices• System clock/calendar with 256-byte CMOS RAM• Interfaces for CD-audio, fax/voice modem, and WaveTablesupport• Standard 1-MB video DRAM onboard plus two upgrade socketsfor up to 2-MB video memory• 188-pin connector for PCI/ISA slot board• Feature socket for multimedia or Ethernet solution• External ports:• PS/2 keyboard and mouse ports• Two buffered high-speed serial ports• One ECP/EPP high-speed parallel port• Video port