Search found 541 matches

by nocash
September 17th, 2023, 7:25 pm
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

It works!!! Doing the data transfer was quite simple, except that I totally couldn't figure out how to terminate the damn data transfer once when all data was transferred. In hindsight, it's that's also quite simple: Use message 10h/11h to start the http connection (including sending/receiving the 1...
by nocash
September 17th, 2023, 5:22 pm
Forum: Research
Topic: PBP Disk Image Format (Sony)
Replies: 11
Views: 14971

Re: PBP Disk Image Format (Sony)

Very good to know that the audio format is called ATRAC3, thanks! I've never heard about that format, I've looked up the wikipedia article, but I am still not sure what it is (concerning decompression speed, quality, and compression ratio, compared to other lossy formats like ADPCM or MP3). Oh, and ...
by nocash
September 11th, 2023, 12:30 pm
Forum: General Chat & Messaging
Topic: SCPH-7502 problem
Replies: 8
Views: 9502

Re: SCPH-7502 problem

I still don't understand if or how you could ever have changed the potentimeter. Those things things don't change their position when you "may have touched" them. I don't trust your judgement - I am almost sure that you have never changed the potentiometer setting. Unless your definition o...
by nocash
September 10th, 2023, 10:37 am
Forum: General Chat & Messaging
Topic: SCPH-7502 problem
Replies: 8
Views: 9502

Re: SCPH-7502 problem

Did you do all those things without ever testing if the console did still work (or perhaps it even still does work)? The sled position doesn't matter, it does automatically move to innermost position on power-up. The potentiometers, there is little chance that you could change them accidently withou...
by nocash
September 7th, 2023, 3:07 pm
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

Some I-Mode documentation does actually exist in public. DoCoMo Technical Journal The "DoCoMo Technical Journal" contains four "Special Issue on I-mode Service" articles: Media Concept https://www.docomo.ne.jp/english/binary/pdf/corporate/technology/rd/technical_journal/bn/vol1_1...
by nocash
September 6th, 2023, 11:23 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

Network expert anyone? I've examined the binary packet header. It does contain a TCP-style 16bit checksum, but the rest doesn't look like TCP. Is that some other common standard format? Pre 3 Send Command (01h,00h,01h) (imode/cable-specific send command) 000h 2 TCP-style Checksum (sum of following b...
by nocash
September 4th, 2023, 12:37 pm
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

Got it! It did require only a single 5-byte response on the 80h-byte stream: 84 01 73 83 57. That is, some kind of "final snippet" flag (bit7) with length (4), the actual 2-byte response (01h,73h) (which I had mistyped 01 7F in previous post). And the CRC16 (5783h) (which isn't a normal CR...
by nocash
September 2nd, 2023, 7:50 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

I am still workinjg on that obscure cable, and making some progress on solving the message layer for the 80h-byte stream. First hurdle This almost made me give up. The first thing you see when looking at the 80h-byte message handling is stuff like this: 800DC518 00001810 mov r3,hi ;N*ADD5E633h/10000...
by nocash
September 1st, 2023, 6:44 pm
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 43
Views: 72471

Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)

So, even with excellent pictures, I guess it would be impossible to see it to the eye. I can't even find a simple drawing, like those in the playstation pdf patent file. As far as I understand, the 22kHz wobble is everywhere on CDRs (as timing mark), and there's some kind of additional wobbling for...
by nocash
September 1st, 2023, 6:03 pm
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 43
Views: 72471

Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)

1) I am quite sure that there are already modchips doing that, that's nothing new. 3) How on earth could the spindle speed affect the sled seek times??? Faster rotation is only needed in Lead-in, doing it elsewhere would cause issues on movie/audio streaming timings. 4) It's just a normal disc with ...
by nocash
September 1st, 2023, 5:36 am
Forum: NO$PSX Emulator
Topic: NO$PSX V2.1 Released (20th Aug 2022)
Replies: 58
Views: 65412

Re: NO$PSX V2.1 Released (20th Aug 2022)

Those aren't anywhere near 71 minutes, the PoPorogue http://redump.org/disc/1552/ page does even tell you that the track is only 66:24:04 tall. Counting the size in bytes isn't too reliable as the actual length depends on the amount of bytes per sector. Anyways, the Judge Dredd binary is 750,048,096...
by nocash
August 31st, 2023, 2:39 pm
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 43
Views: 72471

Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)

No, you can't "convert the oscilloscope read to data". I meant that "you must convert the data yourself", based on the sony patent and on the cdrom specs. And thereafter, you could use the oscilloscope to verify if you have actually converted it as planned. Wiring a oscilloscope ...
by nocash
August 31st, 2023, 12:18 pm
Forum: Research
Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
Replies: 43
Views: 72471

Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)

A complete copy of the US6122739 patent - with images - can be found here https://patentimages.storage.googleapis.com/d5/46/ad/1d807e35807464/US6122739.pdf it's referring to "wobble" and "wobbling" in the "radial direction", and the images (FIG.2B and FIG.3) are illustr...
by nocash
August 31st, 2023, 9:43 am
Forum: NO$PSX Emulator
Topic: NO$PSX V2.1 Released (20th Aug 2022)
Replies: 58
Views: 65412

Re: NO$PSX V2.1 Released (20th Aug 2022)

Interesting. I don't remember where the 72 minute number came from, it's probably one of the many theories about the exact capacity of the original CDs. As for CDRs, the existing sizes listed on german wikipedia are 21, 23, 63, 71 , 74, 80, 90, 99, and 100 minutes, http://web.archive.org/web/2/http:...
by nocash
August 27th, 2023, 10:51 am
Forum: General Chat & Messaging
Topic: psxdev.net slow loading and timeouts
Replies: 4
Views: 9079

Re: psxdev.net slow loading and timeouts

I don't know why, but it's now working faster again (since friday).
by nocash
August 27th, 2023, 9:45 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

For the response messages mentioned above (eg. 38h,02h etc), Hamster Club-i contains a terrible table (at 80101F9C), plus several child tables for computing the format/length of the separate messages: C0h..CFh 19h 35h,x, ... , endflag(bit0) 38h,data[1] 61h,data[10h] 64h,01h 64h,02h,data[1] 64h,03h,d...
by nocash
August 27th, 2023, 8:58 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

I got some background info on japaenese phones via PM... The biggest problem with those Japanese phone expansion connectors is that there are lots of variants - about the only pins you can generally expect to be the same are the ones used for charging the battery. Different variants used different s...
by nocash
August 21st, 2023, 4:20 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

I've found pinouts for another similar connector. Interestingly, it does list wirings for different external devices like PC cable, printer, or download (whatever that is). Sharp GX10i Service Manual, External Connector CN302: Schematic JTAG Genie Download Printer PCcable Normal 1 - GND GND GND GND ...
by nocash
August 19th, 2023, 12:40 pm
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

And another breakthrough: The name "iNavilink" in the pdf is bogus. The correct spelling appears to be "i-Navi Link". With that keyword, the search results have almost doubled (from "near zero" to "not much more"). Hmmm, that doesn't change my overall impressi...
by nocash
August 19th, 2023, 11:33 am
Forum: Input/Output
Topic: I mode cable/software
Replies: 27
Views: 52130

Re: I mode cable/software

One major finding: There's a whole web browser for I-Mode. And it's somewhat hidden in plain sight: The SCPH-10180K package contains the SCPH-10180 cable, and PBPX-95013 cdrom (with some gray-on-gray artwork in a gray cardboad box, it's almost invisble, and looks more like a random CDR than an actua...