Search found 18 matches

by orionfuzion
Tue Nov 26, 2019 4:28 pm
Forum: 680x0
Topic: The secrets of the 68000
Replies: 14
Views: 1226

Re: The secrets of the 68000

By masking interrupts it is possible to have a deterministic behavior. Based on that trick, one could write a small protection scheme that works on a real HW but fails on emulators.
by orionfuzion
Tue Nov 26, 2019 1:36 pm
Forum: 680x0
Topic: The secrets of the 68000
Replies: 14
Views: 1226

Re: The secrets of the 68000

Fascinating!
Thanks for this clear and detailed explanation.
I guess no emulator handles this correctly?
by orionfuzion
Wed Jul 03, 2019 1:30 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Mr Nours wrote:Thanks Orion, i just tested patched upx an depack routine within or mjj demo system. Works fine!


:cheers:

-- Orion
by orionfuzion
Tue Jul 02, 2019 2:10 pm
Forum: Demos - General
Topic: Too OLD to CODE?
Replies: 6
Views: 2615

Re: Too OLD to CODE?

Good to see you in person Mr Nours! Congratz for your first place in the OLDSCHOOL DEMO category ;)

-- Orion
by orionfuzion
Thu Jun 27, 2019 12:13 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Here is my nrv2b unpacking routine (which works with files packed as data using my upx patch): ; ; UPX unpacking macros ; ADDBITS macro add.b d0,d0 ; sets Z, C and X endm ; Get 1 byte, then get 1 bit into both C and X. FILLBITS macro ; Note: we shift the X flag through, ; thus must init d0.b with $8...
by orionfuzion
Tue Apr 30, 2019 3:30 pm
Forum: Games - General
Topic: dbug down?
Replies: 20
Views: 16928

Re: dbug down?

There was a small hiccup with the DNS. Depending on your DNS it should be fine now. Hi ggn, dbug website is up, but what about the team? :) I came back in 2016 and therefore I missed all the fun you had working on games adaptations... It seems everybody stopped around 2012, is there any reason for ...
by orionfuzion
Wed Apr 03, 2019 9:23 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

WOW... I just switched from Atomik 3.5 to UPX nrv2b for the packing of my next crack/fileversion (2 floppies), I got the same compression ratio but UPX decrunches at the speed of light :)
by orionfuzion
Sun Mar 31, 2019 10:02 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Hi mates, Please find attached a patch (zipped) that enables the packing of raw data files using the UPX compression program. Thus there is no more need to insert a fake PRG header to fool UPX for compressing data files. Apply the patch to the source directory of the latest UPX version (3.95). Run m...
by orionfuzion
Sat Mar 30, 2019 6:49 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

ripupx.s removes the dummy PRG header. I modified the code to support latest UPX versions and -small etc for Closure. I dislike Hakim's approach which is to add a fake PRG header before the actual data in order to fool UPX, because that fake PRG header is packed together with the data and it may be...
by orionfuzion
Fri Mar 29, 2019 9:30 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

I'm currently trying to modify the UPX compression program to enable the packing of data files. Did someone already work on that? Try https://github.com/ggnkua/Atari_ST_Sources/tree/master/ASM/Various/Hakim/UPX Yep, I saw the corresponding post on this forum (15 years ago !). But I don't like the a...
by orionfuzion
Fri Mar 29, 2019 10:42 am
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Orion, You can grab arj mode 7 packer and unpacker with source and windows binaries from the other orion_'s (with underscore!) website: http://onorisoft.free.fr/jag/bjlpak.zip As for cranker, I'm sure that last time I tried, I built it with standard cli tools and gcc, it worked first time. Thx mate...
by orionfuzion
Wed Mar 20, 2019 11:56 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Apart from the 4k binary Cyprian tried, has anyone done any other tests regarding pack ratio? I'm still favouring ARJ mode 4 and 7 for max pack ratio, but this looks like a great alternative for when depack speed is crucial. Regarding packing ratio, if you're looking for best ratio ever, use shrink...
by orionfuzion
Wed Mar 20, 2019 9:31 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

orionfuzion wrote:Hi everybody,

I jump on this thread to ask if someone has the ARJ mode7 unpack routine in ASM?

Thx,

Orion


Finally found in the ARJ Beta v9.97B package on demozoo: https://demozoo.org/productions/133652/
by orionfuzion
Wed Mar 20, 2019 8:43 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 48
Views: 20600

Re: LZ4 decoder (assembler)

Hi everybody,

I jump on this thread to ask if someone has the ARJ mode7 unpack routine in ASM?

Thx,

Orion
by orionfuzion
Tue Jan 01, 2019 11:15 pm
Forum: News & Announcements
Topic: The Replicants are back in town ;)
Replies: 9
Views: 6133

Re: The Replicants are back in town ;)

The purpose of this comeback is to 1) have some fun & nostalgia and 2) document the techniques used to crack/file/pack... games on Atari ST. For each new crack, I will release the full sources with detailed explanations. For Safari Guns, it's available here: https://github.com/orionfuzion/newcr...
by orionfuzion
Fri Dec 28, 2018 5:53 pm
Forum: Games - General
Topic: List of non proper games dumped
Replies: 29
Views: 7794

Re: List of non proper games dumped

SSS is in the pipe! Stay tuned ;)
by orionfuzion
Thu Dec 27, 2018 2:27 pm
Forum: News & Announcements
Topic: The Replicants are back in town ;)
Replies: 9
Views: 6133

Re: The Replicants are back in town ;)

The purpose of this comeback is to 1) have some fun & nostalgia and 2) document the techniques used to crack/file/pack... games on Atari ST. For each new crack, I will release the full sources with detailed explanations. For Safari Guns, it's available here: https://github.com/orionfuzion/newcra...
by orionfuzion
Sun Nov 13, 2016 11:58 pm
Forum: Coding
Topic: Toxic Packer 1.0
Replies: 3
Views: 3862

Re: Toxic Packer 1.0

Hi Maartau !

I'd like to talk about that toxic packer (and other protections) with you ;)

Je t'ai envoyé un email également... contacte moi ;)

A+

Sebastien aka Orion Fuzion/Replicants

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