The disadvantage of the Am386 versus the 486 was that the 386 bus was an evolutionary dead end. The 386 topped out at 40 MHz,with the only upgrade path being one of TI and Cyrix’s clock-multiplied 386/486 mashups. Meanwhile, the 486 reached speeds of 133 MHz by September 1995. But since most 40 MHz 386-based PCs were open architecture clones built from off-the-shelf AT parts, you could swap the motherboard and CPU while carrying over most of the rest of your parts. This was more expensive and labor intensive than swapping a CPU, but it was much cheaper to buy a 40 MHz 386 and upgrade to a faster 486 after 2-3 years than it was to buy the fastest 486 at the start.
We’re at the start of another one of those weeks where Apple announces one or two of its lesser products each day. The first pair to break cover is the iPhone 17e and iPad Air M4, with more due to drop as the calendar rolls forward. The iPhone 17e is by far the more interesting gadget, especially as the price remained the same as for the iPhone 16e. Apple is charging $599 for the 17e, even though the base model storage has doubled to a very welcome 256GB.。下载安装汽水音乐对此有专业解读
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