Intel’s Pentium FDIV bug and recall

Intel’s Pentium FDIV bug and recall

On June 13, 1994, a mathematics professor discovered a bug in Intel’s then-new Pentium CPU. Intel’s new CPU was fast, but it couldn’t divide correctly. The bug became known as the Pentium FDIV bug. It resulted in Intel recalling 60 and 66 MHz Pentium CPUs in stepping levels prior to D1, and 75, 90, and 100 MHz Pentium CPUs in steppings prior to B5. The recall cost Intel $475 million and might have caused reputational damage if more viable competitors had been available at the time. Collectors prize a surviving Pentium CPU with the FDIV bug today.

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TI-99/4A discontinued October 28, 1983

TI-99/4A discontinued October 28, 1983

42 years ago today, on October 28, 1983, Texas Instruments announced it was discontinuing the TI-99/4A computer and withdrawing from the home computer market. It was a stunning admission of defeat for a company that had everything it took to absolutely dominate the home computer market: vertical integration, name recognition, pre-existing relationships with retailers, and a compelling design. Let’s look at what went wrong.

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