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Re: 6502bench SourceGen disassembler updated [message #388161 is a reply to message #388148] Tue, 29 October 2019 05:44 Go to previous messageGo to previous message
Anonymous
Karma:
Originally posted by: Anthony Adverse

On Tuesday, October 29, 2019 at 8:55:39 AM UTC+11, fadden wrote:
> I've long wondered what sort of algorithm DDDeluxe 5.0 applied when packing disk images. There were a number of competing programs in the pre-ShrinkIt days. ISTR DDDeluxe working better than most.
>
> I started disassembling it, but kept finding lots of weird self-modifying code. Not the usual sorts of "set up the pointer I'm about to use a lot", but rather "let's copy this 3-byte JMP instruction on top of other code".
>
> I wasn't sure why it was doing those things, until I found this:
>
> .str ‘This message is for you, the asshole who tryto disassemble my ’
> + ‘program D.D.DeLUXE V5.0:I know why you do this: You don't hav’
> + ‘e enoughimagination to program your own packing algorithmand p’
> + ‘rogram.Because you are not enough intelligent, you preferto co’
> + ‘py what I did... That's the true!Don't forget this program is’
> + ‘ a SHAREWARE and it isa copyrighted product by LOGIX INNOVATIO’
> + ‘NS 1989.You can be pursuit for $10000 if you copy anypart of t’
> + ‘his program without the autorization ofLOGIX INNOVATIONS. Fuc’
> + ‘k you, NO-BRAND !’

I thought there was some level of consensus that DDD used huffman encoding?

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