xvi AbbreviationsK kilo (1024)k kilo (1000)KB kilobytekg kilogramkHz kilohertzlb poundLED light-emitting diodeLSB least-significant bitLSI large-scale integrationM megamA milliampsmax maximumMB megabyteMDA Monochrome Display AdapterMFM modified frequency modulationMHz megahertzmm millimeterms millisecondMSB most-significant bitNASC National Authorized ServiceCenterNC not connectedNMI Non-maskable Interruptns nanosecondNSRC National Service ResponseCenterPAL programmable array logicPC personal computerPCB printed circuit boardPFP plastic flat packagePIO parallel input/outputpixel picture elementPLCC plastic lead chip carrierPLL phase lock loopp-p peak-to-peakPPI programmable peripheralinterfacePROM programmable ROMQFP quad flat packRAM random-access memoryRAMDAC RAM digital-to-analogRAS row address strobeRGB red green blueRGBI red green blue intensityROM read-only memoryrpm revolutions per minuteR readRTC real-time clockR/W read/writeS slaveSG signal groundSIMM single inline memory moduleSVGA Super Video Graphics ArraySW switchTAC Technical Assistance CenterTSC Technical Support CenterTTL transistor/transistor logictpi tracks per inchV voltVdc volts, direct currentVESA video electronics standardsassociationVGA Video Graphics ArrayVRAM virtual RAMW wattW write