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IBM PC based on the Intel 8088 with a frequency of 4.77 MHz was not as powerful as many other personal computers of the time.



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The base configuration has only 16 Kilobayt internal memory and to download and store data used audio tape - the drive is an option, and the hard drive is not supported.



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The basic system for home use to connect to the tape deck, TV, and cost $ 1565.
PC-DOS, an operating system that does not fit on the tape, so that the base system has worked only in the programming environment Microsoft BASIC, which is stitched into each computer.



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A more typical system for home or school with a memory of 64K bytes, had a drive and its own display, cost about $ 3000.
The expanded system for business with color video card and monitor, printer and two disketovodami cost about $ 4500.



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Five internal ISA expansion slots on the motherboard provides the opportunity to add additional memory and other devices, although one slot usually occupied by the graphics card, and one more - an optional drive controller. On the third slot, as a rule, established map the RS-232 port.
Despite the fact that the original IBM 5150 «PC», supported only 64K of RAM on the motherboard in later applied more capacious memory chips that allows up to 256K on board and up to 640K with a card expansion.



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