What are the 94 printable characters from the 128 characters of ASCII table?

[James McKenzie]

On 7/24/11 10:41 PM, Gregory Woodbury wrote:
>
>
> On Mon, Jul 25, 2011 at 12:52 AM, yudi v <yudi.tux at gmail.com 
> <mailto:yudi.tux at gmail.com>> wrote:
>
>     No it's not my homework, just curious.
>     I looked at that link before posting.
>     what confused me was the DEL key code. Usually the first 32
>     characters are control characters but the wiki article clubs DEL
>     with the control characters where as it's assigned the last code
>     in the table. That's after the printable characters.
>     That's why I posted here to get a confirmation.
>
>
> It's history. The DEL code was all holes punched in paper tape 
> (8-level) that was used to RUBOUT a character in error.
> Teletype and papertape systems were programmed to ignore the 0xFF 
> code.  When ASCII was formalized, the code for DEL
> was firmly in use as a control character and papertape was still in 
> use.  The various other "control" codes were used for various
> esoteric paper tape storage methodologies and later for 8-bit wide 
> magnetic tape systems.
>
And it was carried over to 8 bit tape as well as BAUDOT (sp) code tape.  
Great thing too.  It was also used on punch cards.

Yep, I was around in those days and did a lot with paper tape and an 
HP-3000 BASIC computer.

And one of the ways to create that code today is to use the SHIFT + 
BACKSPACE combination in PuTTY, at least the way I configure it.

James