2-4 Altos 500 System GuideSystem Board Layout without Network Connector1 PS/2 mouse port2 PS/2 keyboard port3 USB connectors4 Serial port 25 Parallel port6 Serial port 17 BIOS8 ISA slots9 PCI slots10 AGP slot11 Battery12 Intel 82371EB13 IDE1 connector14 IDE2 connector15 FDD connector16 Intel 440BX17 DIMM sockets18 Voltage regulators19 CPU slot20 Power connector12 3 4 567 891011121314161718192015