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It was notable at the time for having an open architecture which allowed third-party peripherals and custom software; it subsequently became known as the first computer to standardize the publics concept of a "PC." Apart from the hard drive, it was essentially the same as the original PC, with only minor improvements. Such computers were referred to as PC clones, or IBM clones. The first thing to think about when considering an IBM-compatible computer is, "How compatible is it? In the interest of faster booting (a fully loaded 5150 with 640 KB could take over half a minute to complete the POST memory scan), the XT BIOS only attempts to read one bit each from the leftmost chip in each bank and if so, assumes that bank is filled.A striking but largely undocumented feature of the IBM XT, was that the motherboard could be configured for several different memory-chip types. persönlicher Rechner, kurz IBM PC) war die Modellbezeichnung des ersten Personal Computers (PC) des US-amerikanischen Unternehmens IBM aus dem Jahr 1981. Nichts davon ist wahr. Upgrading the older boards to "256K-640K" boards is as simple as changing some jumpers, adding an IC to an empty socket, and replacing the first two banks of RAM chips with 256Kb parts. $75.00. Die Gerätelinie war ein großer kommerzieller Erfolg für IBM. Ein ähnliches Verfahren ermöglicht es Ihnen, diese Art von Mikrocomputersystem-Software auf größeren Teilen der IBM-Computerausrüstung zu … The IBM Personal Computer XT, often shortened to the IBM XT, PC XT, or simply XT, is a version of the IBM PC with a built-in hard drive released as IBM Machine Type number 5160 on March 8, 1983. Trotzdem krempelte es den noch jungen Markt für Arbeitsplatz- und Heimcomputer komplett um. IBM will soon be as much a prisoner of its standards as its competitors are. Apple Macintosh Ethernet NuBus Card M0417LL/B new in box unopened documentation. Der IBM 5150 PC wurde am 12. Unlike many hard disk systems on microcomputers at the time, the XT was able to boot directly off the drive and did not require a boot floppy. Sie können eine aktive DOS-Partition für Ihr Standard-Betriebssystem IBM PC XT und eine sekundäre Unix-Partition für Microsoft Xenix auf derselben Festplatte erstellen. PC/XT stands for Personal Computer/Extended Technology (IBM). $10.50 shipping. Machines sold from IBM initially only used the standard 64Kb configuration for a maximum of 256KB onboard, however in 1986 stock machines configured for the 64Kb/256Kb combo and a maximum 640Kb onboard were sold. The term "IBM PC compatible" is now a historical description only, … By changing some jumpers, you could choose between 16Kb chips, 64Kb chips, 128Kb chips, and first half 256Kb plus second half 64Kb chips. Ending Today at 6:30PM PDT 1h 4m. $150.00 shipping. Aside from the hard disk, a serial port card was also standard equipment on the XT, all other cards being optional.The XT had three BIOS revisions; the original dated November 8, 1982, the second dated January 10, 1986, and the third dated May 9, 1986. Watch. Das Unternehmen setzte damit einen informellen, weltwei… The PC Handbook, Hardware, Software & Firmware, XT- AT Computer, DOS Handbook . By the end of 1983, the XT was neck-and-neck with the original PC for sales and IBM were selling every one that they made.A Seagate ST-412 hard disk was standard equipment, and the XT was not offered in a floppy-only model for its first two years on the market, although the standard ribbon cable with two floppy connectors was still included. The latter two were the versions found on 256–640 KB motherboards and added support for 3.5" floppies, 101 key keyboards, and a few other minor things such as a joystick input function (INT 15h Function 84h) and faster POST. XT stands for eXtended Technology. "The main reason why an IBM standard is not worrying is that it can help competition to flourish. $105.00 + shipping . Once enough IBM machines have been bought, IBM cannot make sudden changes in their basic design; what might be useful for shedding competitors would shake off even more customers.Because of the great number of third-party adapters and no standard for them, programming the PC could be difficult. The machines with the alternate configuration were marketed as "256K-640K" boards to distinguish them from the "64K-256K" boards, allthough the two board "versions" are technically similar in almost every way except for the configuration and type of installed memory. The only way to purchase an XT with factory-installed dual floppy drives was if the user also bought the optional 5161 expansion chassis and placed the hard disk in that, which in effect amounted to purchasing two hard disks as the 5161 also came with one standard. PC/XT is defined as Personal Computer/Extended Technology (IBM) somewhat frequently. 0 bids. See similar items. XTs with the 1982 BIOS may be upgraded to the newer revision. RARE 1985 IBM 5162 Personal Computer XT Model 286 System - (5160 Chassis) $1,250.00.