Re: [WinMac] ASCII is not ASCII

Leonard Rosenthol(leonardr[at]Adobe.COM)
Tue, 22 Sep 1998 22:44:07 -0400

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>ASCII codes 1-128 are identical. Those
>codes include all upper and lower case letters, spaces, returns, tabs,
>and much of the commonly used punctuation.
>
        Correct - and that's all that ASCII defines, the 7bit character
space. Anything above 128 is NOT ASCII.

>129 to 256 are totally
>different. This includes characters like 1/4 on PC which map to a
>ligature (Fl) on the Mac. The copyright symbol and trademark symbol
>also move.
>
        Correct. This is known as "Extended ASCII".

> One interesting extra tidbit is that PC ASCII shows characters
>above 256 (all the way up to the 700's).
>
        You're thinking about code pages, which is a whole nother beast all
together. And in that case, also starts to map to things like script codes
on the Mac.

> As far as CF and LF, I think there is a difference, but I am not
>sure how much trouble it causes since it is not a problem for the
>thousands of files we deal with going between 95, NT, and Mac(while the
>ASCII stuff is a real headache).
>
        MacOS uses CR (carriage return = ASCII 13 (0x0D)) for the line
termination character, while the PC uses both a CR and an LF (line feed =
ASCII 10 (0x0A)). Depending on the text editor in use on a given platform,
you may get little boxes in your text and lines that don't wrap :(.

Leonard
----------------------------------------------------------------------------
Leonard Rosenthol <mailto:leonardr@adobe.com>
Designated Free Electron (612) 766-4718 (Minn)
Adobe Systems Incorporated (215) 233-5270 (Philly)

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