Purely historic question: VT200 text graphic programming

[Martin Gregorie]

On Fri, 11 Mar 2011 04:39:02 -0600, GrayShark wrote:

>> 	I think the order went the other way -- I think most of the ANSI
>> sequences were inherited from the VT52/VT100 terminals.
> 
> Are you implying ascii came after the VT52/VT110 terminals? VT52 is a
> ascii code based piece of shit, including the backspace/return character
> set (which Windows still honors like it's a deity).
>
He said ANSI, not ASCII. Any, yes I think VT100 preceeded ANSI escape 
codes too. ANSI codes are very similar to VT100 escape codes. I don't 
remember seeing ANSI codes before the MS-DOS ANSI driver was introduced 
but I'd used VT100s long before that on assorted minis and 8-bit micros.

 
> Working from the old days, the ascii set used 0->127 (zero -> seventh
> bit) to represent special keys and sounds, letters, numbers and common
> punctuations. The eight bit was reserved for error correct. Remember
> this was a serial 'printer' console language. It need updating as much
> as the QWERTY keyboard does.
> 
> Sometime after 1975, graphical glyphs were added, using the eighth bit.
> Some VT models supported the extended ascii, as did IBM-DOS.
> 
> Strange the history one remembers.



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martin@   | Martin Gregorie
gregorie. | Essex, UK
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