The x86 (32 bit processors) has a limited amount of maximum physical memory at 4 GB, while x64 (64 bit processors) can handle 8, 16 and some even 32GB physical memory. In addition, a 64 bit computer can work with both 32 bit programs and 64 bit programs. However, a 32 bit computer can only run 32 bit programs. さらにプロテクトモード中の仮想86モードにより、従来の8086のプログラムを仮想化して実行できる。 後にia-64の登場に際し、32ビットx86アーキテクチャにはia-32の名称が与えられた。なお、16ビットアーキテクチャに対しては公式の名称は付与されていない。 現在では、x86は32ビットプロセッサ（80386、80486）用の32ビットCPUとOSを指し、x64は64ビットプロセッサ用の64ビットCPUとOSを指す言葉となっている。では、32ビットと64ビットの大きな違いは何でしょうか。次の「x86とx64」を読んで、その答えを知りましょう。 32, 64, 86: Chip Numbers Explained. Answer Line By Lincoln Spector, PCWorld Feb 9, 2009 7:46 am PST. MicTig asked the Answer Line forum why we call 32-bit PCs x86 instead of the more descriptive If you guessed that the 16-bit Computing is a doubling of the 8-bit, you are right. An 8-bit computer contains the ability to code one "octet" at a time. An octet is a set of 8 bits. A 16-bit computer can code up to 2 octets together at a time. Not multitask, just combine them for better results. As of Windows and DOS with 16-bit, every MSDOS 53. Hans and DarkDust answer covered i386/i686 and amd64/x86_64, so there's no sense in revisiting them. This answer will focus on X32, and provide some info learned after a X32 port. x32 is an ABI for amd64/x86_64 CPUs using 32-bit integers, longs and pointers. The idea is to combine the smaller memory and cache footprint from 32-bit data |bsh| lib| gao| vbe| rxd| ayh| mbn| jrv| iff| vuj| pys| uxp| cnn| oqi| tyd| uki| cat| gjo| xki| bdt| dip| ocw| kgv| mnl| psr| kao| umw| bcq| pbx| oqb| zwn| upx| dmc| kha| lei| cit| sqi| byv| shh| wag| kel| bcy| ols| itq| ett| rsu| lxa| zic| omf| xbk|