![]() ![]() ![]() Some PC cases even included a two-digit, segmented LED display that switched between the turbo and non-turbo numeric clock speeds whenever you pushed the Turbo button. This made Turbo buttons absolutely essential to play early PC games, many of which were still less than a decade old at the time. They moved from about 16 MHz to around 100, with stops at 20, 33, 40, and 66 MHz along the way. In the early-to-mid 1990s, the average CPU clock speeds of IBM PC compatibles jumped into the stratosphere. Turbo Buttons Exploded in Popularity Three examples of generic 386-era PC cases with turbo buttons. This is likely because other PC manufacturers copied it, and put it in off-brand commodity PC cases and motherboards.īy 1988, Turbo buttons were everywhere. No manufacturer would ever include a large button labeled “Slow” on the front of its speedy new PC, so “Turbo” was a clever choice on Eagle’s part.Ī few years after the introduction of the Eagle Turbo PC (when accelerated PC clones became inexpensive enough to be mass-market items), “turbo” suddenly became the generic industry term for this CPU slowdown feature. In the ’80s, it was common for commercial marketing departments to apply the word “turbo” to products to denote extra speed or power. The word “turbo” is an abbreviation of “turbocharger,” a device that makes internal combustion engines run faster. If someone attempted to run them at faster speeds (like 8 MHz or beyond), some of these early programs became unstable. #Turbo my pc disk cleaner pro softwareAs a result, most software applications and games created for the IBM PC were tuned specifically to the 5150’s 4.77 MHz clock speed. Most application developers in the early ’80s didn’t anticipate that the IBM PC would become a backward-compatible platform, or that its performance would skyrocket. This speed increase introduced a problem. ![]() New PCs Were Too Fast for Existing Applications For example, several models used an 8 MHz Intel 8086 chip that was roughly two to three times as fast as the original IBM PC’s CPU. Some of the early clone manufacturers took things even further and produced much faster machines. Some included integrated peripheral ports, more RAM, and real-time clocks, while retaining software compatibility. #Turbo my pc disk cleaner pro seriesThese clone machines often added features that were missing from IBM’s PC series at a much lower price. A marketing photo of the IBM PC 5150, circa 1981. Competitors, like Compaq, soon reverse-engineered the machine, licensed Microsoft’s MS-DOS operating system, and created their own IBM PC-compatible computers. The first IBM Personal Computer, released in August 1981, included an 8088 CPU that ran at 4.77 MHz. ![]()
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