IBM Personal Computer XT

IBM Personal Computer XT

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IBM Personal Computer XT

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The IBM Personal Computer XT, often shortened to the IBM XT, PC XT, or simply XT, was IBM's successor to the original IBM PC. It was released as IBM product number 5160 on March 8, 1983, and came standard with a hard drive. It was based on essentially the same architecture as the original PC, with only incremental improvements; a new 16-bit bus architecture would follow in the AT. The XT was mainly intended as an enhanced machine for business use, and a corresponding 3270 PC featuring 3270 terminal emulation was released later in October 1983. XT stands for X-tended Technology.

The standard XT originally came with 128kB of memory, a 360kB double-sided 5.25" full-height floppy disk drive, a 10MB Seagate ST-412 hard drive with Xebec 1210 MFM controller, an Asynchronous Adapter (serial card with 8250 UART) and a 130W PSU. The motherboard had eight 8-bit ISA expansion slots, and an Intel 8088 microprocessor running at 4.77 MHz (with a socket for an 8087 math coprocessor); the operating system usually sold with it was PC-DOS 2.0 and above. The eight expansion slots were an increase over the five in the IBM PC, although three were taken up by the floppy drive adapter, the hard drive adapter, and the Async card. The basic specification was soon upgraded to have 256kB of memory as standard. Slot 8 on the XT motherboard was wired slightly different than the other slots, making it incompatible with some cards. This was done for cards designed to allow the XT to be connected...
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