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IBM Personal Computer
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=== Communications === Connectivity to other computers and peripherals was initially provided through serial and parallel ports. IBM provided a serial card based on an [[8250 UART]]. The BIOS supports up to two serial ports. IBM provided two different options for connecting Centronics-compatible parallel printers. One was the IBM Printer Adapter, and the other was integrated into the MDA as the IBM Monochrome Display and Printer Adapter.
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