EntityQ1417058· pop 7· linked from 28 articlesA20 lineSign in to savesignal in the system bus of an x86-based computer systemConnectionsexecutable compressionEntityDR-DOSEntityCONFIG.SYSEntityMicrosoftEntitysource-to-source compilerEntityAddison-WesleyEntityIBMEntityQ47604Entityapplication programming interfaceEntityBIOSEntitybusEntitybootingEntityCP/MEntityIBM PC DOSEntityCOMEntityprotected modeEntityreal modeEntityByteEntitySeattle Computer ProductsCompanyCP/M-86EntityCategoriesIBM PC compatiblesMemory expansionX86 architectureX86 memory management