1-2User’s Guide1.1 Major ComponentsThe system board has the following major components:• A zero-insertion force (ZIF) socket for Intel Pentium andPentium/MMX, 6x86/6x86L Cyrix/IBM, and AMD K5/K6• Two DRAM banks composed of four 72-pin SIMM sockets thatsupport 4/8/16/32-MB 60/70ns SIMMs• 256/512-KB write-back pipeline burst second-level cache• 128/256-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• Standard 1-MB SGRAM onboard• 188-pin connector for PCI/ISA slot board• Feature socket for multimedia or Ethernet solution• 168-pin cache module socket for cache upgrade• External ports:• PS/2 keyboard and mouse ports• Two buffered high-speed serial ports• One ECP/EPP high-speed parallel port• Video port• RJ-45 connector (optional)