Search found 541 matches
- 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...
- 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 ...
- 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...
- 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...
- 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...
- 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...
- 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...
- 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...
- 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...
- 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 ...
- 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$PSX V2.1 Released (20th Aug 2022)
Those aren't anywhere near 71 minutes, the PoPorogue http://redump.org/disc/1552/ page does even tell you that the track is only 66:24:04 tall. Counting the size in bytes isn't too reliable as the actual length depends on the amount of bytes per sector. Anyways, the Judge Dredd binary is 750,048,096...
- August 31st, 2023, 2:39 pm
- Forum: Research
- Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
- Replies: 43
- Views: 72471
Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)
No, you can't "convert the oscilloscope read to data". I meant that "you must convert the data yourself", based on the sony patent and on the cdrom specs. And thereafter, you could use the oscilloscope to verify if you have actually converted it as planned. Wiring a oscilloscope ...
- August 31st, 2023, 12:18 pm
- Forum: Research
- Topic: Reverse Engineering the PSX Copy Protection (Wobble Groove)
- Replies: 43
- Views: 72471
Re: Reverse Engineering the PSX Copy Protection (Wobble Groove)
A complete copy of the US6122739 patent - with images - can be found here https://patentimages.storage.googleapis.com/d5/46/ad/1d807e35807464/US6122739.pdf it's referring to "wobble" and "wobbling" in the "radial direction", and the images (FIG.2B and FIG.3) are illustr...
- August 31st, 2023, 9:43 am
- Forum: NO$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:...
- 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).
- 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...
- 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...
- 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 ...
- 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...
- 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...