The final II in ASCII stands for Information Interchange, and it was based heavily on the technology of the times which was paper (or glass) teletypes. So the >first< things they put in the table were datacom control codes (this was in-band signalling - well before any layered protocols). For instance chr(7) IIRC is 'bell' which rings the bell on the remote machine to wake the operator up. Also from the original physical teletypes we have codes to change alphabet (SI/SO) and to control auxiliary devices (DLE).
As more control codes were added historically you begin to see traces of layering, with some device controls (DC1-DC4), protocol state machine signals (NAK/SYN/ETB/CAN), and codes to indicate record structures (FS/GS/RS/US) which were frequently used to delimit form fields on glass teletypes (dumb terminals). After the control codes you get some special characters (today we see the same sequence as shifted numbers on a US keyboard, though real teletype machines did not have a shift key but a separate upper row). Then numbers (next row of the teletype keyboard), then alpha. Of course, being numerate designers, they made the >very< first entry (number 0) be the null character. Notice that the DEL (delete) is all ones in the original 7 bit code. That is so you can punch every hole across the paper tape, thus physically deleting whatever character was there before. Not at all the same thing as Backspace. HTH, Duncan -----Original Message----- From: Snake Hollywood [mailto:[EMAIL PROTECTED] Sent: 29 September 2003 11:36 To: [EMAIL PROTECTED] Subject: RE: [ cf-dev ] Simple a to z Display them and find out. > -----Original Message----- > From: Lovelock, Richard J [mailto:[EMAIL PROTECTED] > Sent: 29 September 2003 10:25 > To: '[EMAIL PROTECTED]' > Subject: RE: [ cf-dev ] Simple a to z > > > so what do the ascii codes 1-64 represent? > > _______________________________________________________ > * Regards, > Richard Lovelock > Westminster City Council - Web Support > Cap Gemini Ernst & Young > Southbank > 95 Wandsworth Road > London > SW8 2HG > ( 0870 906 7482 > > _______________________________________________________ > > > -----Original Message----- > From: Robertson-Ravo, Neil (RX) > [mailto:[EMAIL PROTECTED] > Sent: 29 September 2003 10:21 > To: '[EMAIL PROTECTED]' > Subject: RE: [ cf-dev ] Simple a to z > > > they are the ACSCII codes for A-Z... > > -----Original Message----- > From: Lovelock, Richard J [mailto:[EMAIL PROTECTED] > Sent: 29 September 2003 10:16 > To: '[EMAIL PROTECTED]' > Subject: RE: [ cf-dev ] Simple a to z > > > why does 'a' start at 65 - what is 0 - 64? numbers and ??? > > _______________________________________________________ > * Regards, > Richard Lovelock > Westminster City Council - Web Support > Cap Gemini Ernst & Young > Southbank > 95 Wandsworth Road > London > SW8 2HG > ( 0870 906 7482 > > _______________________________________________________ > > > -----Original Message----- > From: Robertson-Ravo, Neil (RX) > [mailto:[EMAIL PROTECTED] > Sent: 29 September 2003 10:10 > To: '[EMAIL PROTECTED]' > Subject: RE: [ cf-dev ] Simple a to z > > > <cfloop from="65" to="90" index="i"> > <cfoutput> > #chr(i)# > </cfoutput> > </cfloop> > > > ;-) > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Sent: 29 September 2003 10:09 > To: [EMAIL PROTECTED] > Subject: [ cf-dev ] Simple a to z > > > > Does anyone know of a simple a to z list system to save me > writing another one? > > A to Z accross the top with paged results etc..... > > Regards - Paul > > > > > ************************************************************** > ************** > ********************* > The information contained within this e-mail (and any > attachment) sent by Birmingham City Council is confidential > and may be legally privileged. 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