7-Zip format ported to the PSP

Posted Jul 30, 2006 at 11:26AM by QJ Staff Listed in: Homebrew Applications, Homebrew Development, News Tags: 7-Zip, Ahman, iR Shell, LZMA, MPH

These days, with the functionality of the PSP blown wide open with all the downgraders and hacks, I'm sure a lot of you people have been wondering what MPH was up to. After some of his revolutionary releases like the 2.0 Downgrader and the GTA game loader, a lot of people would be expecting something big.

Well, MPH isn't one to disappoint. He has just successfully ported the LZMA archiving format to the PSP, or more popularly known as the 7-Zip format. Originally created by Igor Pavlov for multiple platforms, this archiving format has been gathering a lot of momentum, and second, only to the RAR format. I've used it a lot and the compression this format allows is simply great.

And Igor Pavlov would be pretty proud to know that another great programmer has just ported his compression format to the PSP. Although it currently only extracts a file called archive.7z in the root of the Memory Stick, it's pretty much guaranteed that in the coming weeks, this will be made into a proper full-fledged application. If not by MPH, then by someone else, because the source code has been released along with the proof-of-concept binary! Heck, I'd love to have it made into an IRShell plugin. Oh well, it depends on Ahman I guess.

Anyways, you can check out for yourself, the final results of what MPH has been busy with for a long time.

Download Link: [PSPLZMA - 7-Zip support for PSP]
Download Link: [PSPLZMA - Source Code]

Via MPH

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Comments

# 1st comment, wow... — LiraNuna 2006-07-30 06:05

nocomment

# yay — Guest 2006-07-30 06:18

great

# Awesome — Guest 2006-07-30 06:26

7z can REALLY compress files - ive seen 2GB archives down to 400mbish.

Hopefully we'll see this encourprated into some emulators.

# Great for snes roms of different type — Guest 2006-07-30 06:42

This would be great to use with snes and n64 roms with many different versions of the same thing.

# We need devhook ISO 7z support! — Grannd 2006-07-30 06:47

That would be heaven!

# Fantastic — Guest 2006-07-30 06:49

Save all the memory stick space :)

# Agreed — Guest 2006-07-30 06:58

Definitely Loyx. I get my roms in 7z format anyway, and each game comes bundled with every version (and hack/mod) of the particular game. This would be a great plugin for the snes emulator, as it would save space and annoying scrolling.

# Forget Emulators, DevHook is the one. — Guest 2006-07-30 07:12

#3

What 7z compressing when you talk about the 2GB down to 400MB? text? Mp3s? There´s a big difference when you talk about different material.

And, if this is so good, then DevHook should have this instead of CISO.. CISO does worse job compressing than DaxIso does.. Boo. :)

# CISO>all — DiabloTerrorGF 2006-07-30 07:15

Why? DAXISO is slow to decompress on the fly making a lot of games stutter even at 333 and/or load time can be longer.

7zip(and I believe DAX is absed of this format) has one of the longest compression/decompression times in existance. It compresses better than RAR, but not by enough for the sometimes insane decompress times.

# Quality — Guest 2006-07-30 07:19

Great stuff, I can now package the CheatDevice with my Pimp My Garage homebrew and install it if required all on the PSP...

Congratulations on a really straight forward and easy to use example... Great job...

# rom compession — Guest 2006-07-30 08:21

Yes this would be great for the emulators.

Atari 2600 - Good2600 1.00

Uncompressed = 16.6 MB

7z GoodMerged = 3.54 MB

Atari Jaguar - GoodJag 2.01

Uncompressed = 160 MB

7z GoodMerged = 88.1 MB

MSX - GoodMSX1 0.999.3b

Uncompressed = 24.8 MB

7z GoodMerged = 10.9 MB

MSX2 - GoodMSX2 0.999.3b

Uncompressed = 39.3 MB

7z GoodMerged = 16.2 MB

Nintendo - GoodNES 2.01

Uncompressed = 2.42 GB

7z GoodMerged = 192 MB

Nintendo Gameboy + Color - GoodGBx 2.02

Uncompressed = 3.87 GB

7z GoodMerged = 511 MB

Sega Genesis - GoodGEN 3.00

Uncompressed = 7.51 GB

7z GoodMerged = 712 MB

Sega Master System - GoodSMS 2.01

Uncompressed = 173 MB

7z GoodMerged = 39.2 MB

Super Nintendo - GoodSNES 2.04

Uncompressed = 16.5 GB

7z GoodMerged = 1.61 GB

# romz0rz — Guest 2006-07-30 08:44

ya emulators, cc sure knows his rom database sizes, perhaps he could share a link to these rom collections.

# 7zip is FAR from 2nd biggest. — Guest 2006-07-30 09:11

Rar is not the largest either. Zip, cab, and .tar.gz are MUCH, MUCH more used than RAR, and especially 7zip.

I'd probably put 7zip at #15th most popular, and rar on a little better.

# is it just me. — Guest 2006-07-30 09:54

yo

is it just me, but the icon0 of this file is the same as the sony updater right?

re4ryu

# YAY — Guest 2006-07-30 20:41

hey liquidtenmillio n we're not saying 7zip is the most popular u div, we're saying it has the best compression ratios.

hey cz, 7zip compressing 1mb of text w/the ppmd algorithm cuts it to about 700kb

1mb of mp3s cut down w/7z would be 200kb.

etc

Go mph and igor pavlov!! and long live free open source 7zip and scrap shareware rar!!

# gta gameloader — Guest 2006-07-31 00:02

i must have read this wrong but

isn't the GTA loader by fanjita??? based on work by edison carter???

how are we going to be able to use this .7z then?

Because its not likely you can .7z iso's because certain games like outrun already have lag when decompressing ciso!

# tar gunzip ftw! — Guest 2006-07-31 01:04

nocomment

# tar gunzip ftw! — Guest 2006-07-31 01:05

Just what #14 said -- .tgz can be half the size of a .zip so it's not all that great. Linux pwns all.

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