关于阿森贝利 [英] about assembeli

问题描述

我的朋友，您能为我解释一下
吗? BCD
EBCEDIC
ASCII

在assembely

感谢

hi my friend could you explain for me about
BCD
EBCEDIC
ASCII

in assembely

thanks

推荐答案

它们都不与Assembly有关:它们是对信息进行编码的方法.
BCD:二进制编码的十进制.每个半字节(4位)保存值1到10.未使用值11到15，它们被认为是无效的.由于硬件除法指令和较快的处理器通常使除以10的过程既快速又简单(ish)，因此如今使用不多了.
EBCDIC:扩展二进制编码的十进制交换码.存储字符("A"至"Z"，"a"至"z"数字以及一系列标点符号和特殊字符的八位方式.IBM专有和PITA. > ASCII:美国信息交换标准代码. 7(或某些情况下为8)位存储字符的方式.引入UNICODE之前，全世界(几乎)使用了什么.仍然很常用.

您可以很容易在Google上找到它！

None of them have anything to do with Assembly: they are ways of encoding information.
BCD : Binary Coded Decimal. Each nibble (4 bits) holds the values 1 to 10. The values 11 through 15 are not used and are considered invalid. Not used too much these days, since hardware divide instructions and faster processors generally made divide by ten a quick and simple(ish) process.
EBCDIC : Extended Binary Coded Decimal Interchange Code. An eight bit way of storing characters (''A'' to ''Z'', ''a'' to ''z'' numbers, and a range of punctuation and specials. IBM proprietary and a PITA.
ASCII : American Standard Code for Information Interchange. 7 (or 8 in some cases) bit way of storing characters. What the whole world (pretty much) used before the introduction of UNICODE. Still in common use.

You could have found this on Google, very easily!

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