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| | | | Tuesday, January 08, 2008 - 14:01 Submitted by: wolf_ Topic: Utilities | | A couple of days ago, Dutch MSX developers XL2s have uploaded a new version of their compression utility Pletter. With Pletter you can conveniently reduce the size of -for example- the graphics and music of your MSX software, and thus have either less storage requirements for your software, or simply have more content using the same space.
Relevant link: XL2s website |
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| By ARTRAG on January 08 2008, 14:22 | there is no "what's new" file...
what is the improvement wrt version 05a ?
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| By Yukio on January 08 2008, 14:23 | Cool!
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| By Huey on January 08 2008, 15:23 | What are the differences between the a and b version?
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| By wolf_ on January 08 2008, 15:37 | According to the pletter.txt
"The size of the lookbackbuffer is stored in the compressed data"
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| By ARTRAG on January 08 2008, 15:41 | this was already in 05a ....
what changes with 05b ?
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| By wolf_ on January 08 2008, 15:47 | well, beats me..
Let's assume that this new version can make strawberry tea.. wouldn't that be nice? 
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| By ARTRAG on January 08 2008, 15:59 | Having recently moved from 04 to 05a, it would quite disappointing for me to know that 0.5b corrects some critical
problem of version 0.5a that could destroy all my data, corrupt my PC, install a bot performing an hacker attack to
same EU Institution, install illegal SW on my hard disk -it's a bot, not my fault- etc. etc.
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| By GhostwriterP on January 10 2008, 19:22 | All the bots and spyware are stil in it ofcourse
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| By nerlaska on January 11 2008, 08:20 | Hello
I would like to know how to obtain the size of the unpacked data using your Platter 5b ASM code
Do I am obligated to save the length of the info in a header?
Thank you.
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| By Arjan on January 11 2008, 09:30 | Bitbuster included that information, but the Pletter guy decided it wasn't useful so he removed it
The source code of Pletter is available, you could easily add that information yourself.
Or, if you don't need to know the original length before decompressing the data, you can still calculate it.
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| By ARTRAG on January 11 2008, 10:35 | I subscribe nerlaska's comment :
in pletter 0.5a it seems that there is no easy way to know the final size in advance from the compressed data (so I had to store/know the original size of the data)
I guess that pletter 0.5b has the same "feature" 
(Actually I do not think that this is a big issue, but it is worth to ask if better ways exit)
BTW what is changed between 0.5a and 0.5b ?
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| By GhostwriterP on January 11 2008, 19:07 | I never needed to know the lenght in advange.
I just do the following:
ld hl,source
ld de,destination
call pakuit
ld hl,destination
or a
sbc hl,de
ARTRAG: Files get smaller (in most cases) with 0.5b
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| By ARTRAG on January 11 2008, 19:57 | You do not use C and malloc
I cannot just set destination to
the heap and hope 
About 0.5a and 0.5b, are the de-packers
in asm the same or compatible ?
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| By [D-Tail] on January 12 2008, 11:33 | GhostwriterP: does that method work in DOS2 as well? If I recall correctly, DOS2 has some memory managing routines. Will the "call pakuit" behave nicely and only depack in free segments?
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| By GhostwriterP on January 12 2008, 15:20 | ARTRAG: 0.5a And 0.5b are fully compatible.
D-Tail: The unpacker is basically a LDIR instruction, what does dos2 memory management have to do with it?
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| By [D-Tail] on January 14 2008, 16:09 | First of all, I know nothing about Pletter's internal organs. I was assuming that, if the compressed data would be like 15kB in size, the data would exceed a memory segment size (16kB) when decompressed. Is this true? Or how does it work?
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| By GhostwriterP on January 14 2008, 19:06 | True, like I said LDIR (without the bc )
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| By Huey on January 16 2008, 14:09 | Does anyone have problems executing pletter.exe???
Version 5a is 96Kb but 5b is 24Kb (and gives an error) 
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| By sjoerd on January 16 2008, 18:04 | Huey: You probably need to install some microsoft runtime environment, I used visual c++ 2005 for this new pletter. Or just re-download pletter0.5.
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| By Huey on January 16 2008, 20:22 | @Sjoerd: Thanks!!!! Repacked my data and gained some extra free bytes!! Great work.
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