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The IBM PC/XT (also written PC-XT or PC XT), commonly referred to as the XT, was IBM's successor to the original IBM PC. It was released on March 8, 1983, and was one of the first computers to come standard with a hard drive.
The XT originally came with 128K of memory, a 360K double-sided 5 1/4" full-height floppy disk drive, and a 10M hard drive, a serial port, eight 8-bit ISA expansion slots (although three were taken up by the floppy drive adapter, the hard drive adapter, and the serial card), and Intel 8088 microprocessor (with a socket for an 8087 math coprocessor). Later models came with 256K of memory standard, and eventually models with 640K and a 20M hard drive were sold.
The XT originally came only in a standard configuration with the hard disk. It was not until 1985 that a model without the hard drive became available. Other models came with two half-height floppy drives as well as the hard drive.
Like the original PC, the XT came with a BASIC interpereter in ROM. Since this interpereter was meant to be used with a casette drive (which wasn't offered on the XT), the only ways to access it were by disconnecting all of the disk drives, or using the BASICA program, incuded on a floppy disk, which added extensions for using the disk drives.
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