about assembeli

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ASM

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

in assembely

thanks

Posted 16-Oct-10 5:20am

samad_najjar

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OriginalGriff · Answer 1 · 2010-10-16T05:43:00

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!