A85: Re: Text editor with compression??


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A85: Re: Text editor with compression??




If you only want to compress text use static huffman. The adaptive version
takes up way too much space, text can be compressed rather well using the
static version. However why would you want compressed text on your TI85 ?
The keyboard makes it impossible to typer more than a few lines at a time.

Dines
-----Original Message-----
From: ilveksen@sci.fi <ilveksen@sci.fi>
To: assembly-85@lists.ticalc.org <assembly-85@lists.ticalc.org>
Date: 13. juli 1998 19:44
Subject: A85: Text editor with compression??


>
>I've had a great idea of creating quite sophisticated text editor for 85.
>One of it's great?? features would be compression. What do you think of
it?
>Would it be worth it? I thought about adaptive huffman being the
compressing
>method. The compression is a bit difficult, since to only compress lowest
>127 characters needs temporary memory about 760 bytes (I don't remember
>exact, it's not important), and if one would like to extend it to be able
to
>compress all 256 characters, memory needed for that might be almost 2kB!!
I
>had another idea to use somekind of static huffman using a constant tree
for
>everything, (i.e. the (de)compression tree would be stored inside the
>program). Anyway, when using compression or not, editing would be fastest
>when the whole text is stored in the same way as the ROM does for
homescreen
>input (which means having free memory of size of the text...). BTW. How
does
>the ROM store the homescreen input? (I don't know excactly :) Well
anyway, I
>hope you get the idea? Just mail more ideas, suggestions! I would
appreciate it!
>
>Henri Moilanen
>
>

_______________________________________

Dines Justesen
Email: dines@post1.com or
       c958362@student.dtu.dk
WWW  : http://www.gbar.dtu.dk/~c958362/
_______________________________________