DeZ3C V1.1
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NOTE : Although this program has not crashed my 83 yet, MAKE A BACKUP before trying. I'm not responsible for whatever that may happen. In other words, if your calc explodes, it's your fault :-)


Introduction
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The 83 can already hold pictures (Pic1, Pic2, etc.). With some tricks, it is possible to transmit these pictures from a PC, to have a logo on your calc, for example.

The problem is that every picture takes up 764 bytes of memory, even if it's entirely blank. Quite a lot. DeZ3C allows you to compress these pictures in order to save space. The compression ratio is between 0% (very complex picture) and 97% (empty picture). Generally, you could expect a 20% gain and often more.


Installation
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To install the program, send DEZ3C.83G to your calculator.


Use
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1) Convert your picture to 96*64 pixels, monochrome (using Paint Shop Pro for example). Save it as BMP (uncompressed) and put it in the same folder than MAKEZ3C.

2) Drop the image file on MAKEZ3C. You can use the example (EXAMPLE.BMP) for a first try. If everything went good, you should see "OK".

3) You should have now a new 83P file (in this case EXAMPLE.83P). Send it to your calculator.

4) Run DEZ3C on your calculator. Type the name of the picture (here EXAMPLE).

5) Stare :-)		(type 2nd+MODE to quit)
Of course, you can have multiple pictures at once on your calc.


Problems ?
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If you get the "Incorrect file size" message, check whether you have saved the image correctly : format, size and number of colors (beware, it is black and white, not greyscale). If it still doesn't work, try to open the example image and alter it with your paint program.

Don't try to convert a photo either : it compresses badly and looks ugly because of the 83's resolution.


Freeware
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This program is freeware, which means you can distribute it freely, provided it stays unchanged (for example don't add, remove, or alter any file).


Final thanks
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James Matthews, Ian Graf, Movax, Joe Wingbermuehle and all the others without whom we would be stuck with TI-Basic :-)