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A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer , model 5150 , employed a standard 2.25 inch magnetic driven (dynamic) speaker. [ 1 ] More recent computers use a tiny moving-iron or piezo speaker instead. [ 2 ]
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team of engineers and designers at International Business Machines (IBM), directed by William C. Lowe and ...
Sound cards for IBM PC–compatible computers were very uncommon until 1988. For the majority IBM PC users, the internal PC speaker was the only way for early PC software to produce sound and music. [3] The speaker hardware was typically limited to square waves.
The original IBM Personal Computer, with monitor and keyboard. The IBM Personal Computer, commonly known as the IBM PC, spanned multiple models in its first generation (including the PCjr, the Portable PC, the XT, the AT, the Convertible, and the /370 systems, among others), from 1981 to 1987.
The Aptiva never managed to recapture IBM's early 1980s PC dominance from Compaq, Dell, or HP. IBM's PC Group had higher costs than its competitors which made it impossible to match them on prices. Throughout the 1990s, IBM lost the most market share in PCs during that decade compared to its rivals, and only the ThinkPad laptop remained a ...
PC Mag summarized its review of the desktop by saying "The Lenovo ThinkCentre M58e is a middle-of-the-road business PC, both in performance and features, though it does have the added benefits of Intel vPro and IT-friendly features. It's certainly worth a look if you need a PC environment that can grow with your business."
The IBM PC AT came with a 192-watt switching power supply, significantly higher than the 130-watt XT power supply. According to IBM's documentation, in order to function properly, the AT power supply needed a load of at least 7.0 amperes on the +5 V line and a minimum of 2.5 amperes on its +12 V line.
Introduced in September 1986, the Deskpro 386 was the first personal computer to feature Intel's 32-bit 80386 microprocessor. It also marks the first time that a major component of the IBM Personal Computer de facto standard was updated by a company other than IBM themselves—in this case, upgrading from the 80286 processor of the Personal ...