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| compression love! [message #902] | Mon, 06 August 2007 01:38 | |||
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Pucrunch is the sigh of love, in all things LZSS variant ( http://www.cs.tut.fi/~albert/Dev/pucrunch/ ). This is a conversion of the 65C02 standalone decompression source for PCE(CD). I added a few things like automatic bank rollover (source). As of current, the largest decompressed file is limited to 32k until I can add additional code for destination bank rollover. On average, pucrunch does a fair bit better on compression than standard LZSS, but decompression is much slower. Also, pucrunch does *very* well with 4bit linear tile format, though you'd have to convert it to 4bpp composite on the fly to the VDC, after decompressing the stream. A working example for the working folk. Everything needed to compile the cd image is there. Just run the example.bat from command prompt (not double click it). Example. Some quick numbers: the 57k tile set file compresses to 16k with LZSS and 10k with pucrunch. (Note: I had to split the tile set into two files since the decompressed size was larger than 32k.) -Rich | ||||
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