Archive of posts tagged IBM

computer organisation – basics

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Decoded instruction is stored in IR. The MAR (memory address register) is used to hold the address of the location to or from which data are to be transferred. MDR(memory data register) contains the data to be written into or read out of the addressed location. ISP stands for Instruction Set Processor. processor BUS is …

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DOS – Disk operating system

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DOS (disk operating system) DOS uses a command-line interface with personal computer .MS-DOS mode is a shell in which MS-DOS environment is emulated in a 32-bit system like windows. MS-DOS programs can run with windows, and create PIF (program interface file) which contains all settings. MS-DOS is written by Tim Paterson and introduced by Microsoft. …

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