GE VMIVME-2128 美国通用电气 PLC/DCS卡件模块

GE VMIVME-2128 美国通用电气 PLC/DCS卡件模块

Pentium处理器每个时钟周期可以执行两条程序指令，使得它的处理能力比前代的Intel芯片要大而快得多。在相同的处理速度下，Pentium处理器执行指令的速度比80486快大约五倍。

在内部，它与80486十分相似。当然，它与前几代的处理器是兼容的。而主要的不同在于它可以同时执行多条指令。Pentium处理器与80x86家族的以前成员保持了的代码兼容性，从而保护了用户的软件投资。

Intel 486微处理器具有一个8K的高速缓存，而Pentium处理器则具有两个8K的高速缓存，其中一个用于指令，另一个用于数据。这些高速缓存用来临时存储从较慢的主存中取出的指令和数据。当系统使用数据时。它很有可能重复地使用它，而从位于处理器芯片内的高速缓存中取出数据，要比从主存中取出数据快得多。

Pentium处理器的浮点单元，是根据Intel 486微处理器中的浮点单元完全重新设计的。它由一个8级的流水线组成，能够在一个时钟周期内执行一次浮点操作。

The Pentium processor can execute two program instructions per clock cycle, making it much more powerful and faster than the previous generation of Intel chips. At the same processing speed, the Pentium processor could execute instructions about five times faster than the 80486.

Internally, it's very similar to the 80486. It is, of course, compatible with previous generations of processors. The main difference is that it can execute multiple instructions simultaneously. The Pentium processor maintains code compatibility with previous members of the 80x86 family, thus protecting the user's software investment.

The Intel 486 microprocessor has one 8K cache, while the Pentium processor has two 8K caches, one for instructions and the other for data. These caches are used to temporarily store instructions and data pulled from slower main memory. When the system uses data. It is likely to use it repeatedly, and getting data out of the cache located inside the processor chip is much faster than getting data out of main memory.