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

[Paul E Condon <pecondon@mesanetworks.net>]

On 20110725_154849, yudi v wrote:
> Hi Paul,
> 
> I am pretty sure you are mistaken,
> 
> 126-32 = 94
> and space is a printable character.
> 
> 
> Yudi

ascii is organized into four blocks of 32 symbols. ( 4 * 32 = 128 )
block 1 is all control functions, none print.
block 2 is punctuation, and decimal digits. (and space 0x20 )
block 3 is mostly upper case latin letters, all print 
block 4 is mostly lower case letters (and the rubout character, which is a
hold over from teletype convention for punched paper tape character
deletion )

there are 128 characters in the code 0x00 to 0x7F

block 1 is all non printing codet 0x00 to 0x1F

blocks 2,3,4 contain 3 * 32 = 96 characters and are mostly printing

but 2 are non printing: 0x20 and 0x7F

I leave the last step as an exercise for the reader. ;-)

-- 
Paul E Condon           
pecondon@mesanetworks.net