Search found 555 matches
- Yesterday, 11:50 pm
- Forum: Input/Output
- Topic: H2500 SN Bios Flash
- Replies: 2
- Views: 88
Re: H2500 SN Bios Flash
Can't help there. But I am curious: What is in those memory chips? As far as known, the DTL-H2500 has two memory chips, IC807-2 32pin MX 27C1000MC-90 (PROM) IC808 32pin F 29F040A-90 (FLASH) I assume the 512Kbyte FLASH is equivalent to the BIOS/Kernel in retail consoles, perhaps with some modificatio...
- April 24th, 2024, 6:49 am
- Forum: Research
- Topic: can mix 2 PS1 game CD in one iso image?
- Replies: 2
- Views: 405
Re: can mix 2 PS1 game CD in one iso image?
Could work. But if you have to ask how, then you probably can't do it, not without knowledge about software development and cdrom mastering. The best way would be to add data compression, and see if you can squeeze everything on a regular cdrom. With the HED/CDF filesystem(s) in Parasite Eve 2, that...
- April 22nd, 2024, 9:52 pm
- Forum: General Chat & Messaging
- Topic: Someone use my profile
- Replies: 4
- Views: 292
Re: Someone use my profile
If someone has used your account - no matter how it was done - that's called hacked. Spam is flooding forums or email inboxes with things like unwanted advertising. First thing is to change your password, and if you have used the same or similar passwords on other sites, also changes those passwords...
- April 22nd, 2024, 4:55 am
- Forum: General Chat & Messaging
- Topic: Someone use my profile
- Replies: 4
- Views: 292
Re: Superlative ?asual Dating - Live Women
That's new, the spammers are now hacking existing accounts from real people, instead of creating their own accounts. User "alimadhi", http://www.psxdev.net/forum/search.php?st=0&sk=t&sd=d&sr=posts&author_id=416 Apart from the Dating spam post, the signature (in all other po...
- April 21st, 2024, 11:26 am
- Forum: General Chat & Messaging
- Topic: Differences between EDC/Anti-modchip/LibCrypt?
- Replies: 4
- Views: 257
Re: Differences between EDC/Anti-modchip/LibCrypt?
Anti-modchip is yet something else:
A modchip does simulate the SCEX wobble (which SHOULD only occur in Lead-In area, but many early modchips do simulate that SCEX signal everywhere including in the discs data area).
Anti-modchip protections do check that SCEX does occur ONLY in Lead-In area.
A modchip does simulate the SCEX wobble (which SHOULD only occur in Lead-In area, but many early modchips do simulate that SCEX signal everywhere including in the discs data area).
Anti-modchip protections do check that SCEX does occur ONLY in Lead-In area.
- April 21st, 2024, 10:41 am
- Forum: General Chat & Messaging
- Topic: alternative to Redump PSX page
- Replies: 2
- Views: 150
Re: alternative to Redump PSX page
Is that a question or an announcement?
And what is a archive.org psx redump website?
If you meant http://redump.org/ or http://redump.org/discs/system/psx/ - those aren't down.
And what is a archive.org psx redump website?
If you meant http://redump.org/ or http://redump.org/discs/system/psx/ - those aren't down.
- April 19th, 2024, 11:21 pm
- Forum: General Chat & Messaging
- Topic: Differences between EDC/Anti-modchip/LibCrypt?
- Replies: 4
- Views: 257
Re: Differences between EDC/Anti-modchip/LibCrypt?
EDC's are CRC32's inside of the 930h-byte data sectors.
Libcrypt uses bad CRC16's in the sub-channels, that require a .SBI or .SUB file (or other sub-channel dumps).
Libcrypt uses bad CRC16's in the sub-channels, that require a .SBI or .SUB file (or other sub-channel dumps).
- April 11th, 2024, 11:35 pm
- Forum: Research
- Topic: New SPU Findings and Questions
- Replies: 0
- Views: 196
New SPU Findings and Questions
SPU Soft Reset If and as long as SPUCNT.bit15=0: All voices are Keyed Off, writes to Key On are ignored, and all voices are forced to ADSR volume=0000h. That is about same as FLG.bit7 on SNES APU (with big thanks to Anomie for rev-engineering the SNES hardware). Unstable 32bit SPU Writes One long-s...
- April 11th, 2024, 7:15 am
- Forum: Sound/SPU
- Topic: SQ/BD/HD format documentation on the PS1, and differences versus SMF MIDI and PS2?
- Replies: 2
- Views: 380
Re: SQ/BD/HD format documentation on the PS1, and differences versus SMF MIDI and PS2?
Is there any documentation for the SQ BD HD format used on PS2 ?
- April 11th, 2024, 5:29 am
- Forum: General Chat & Messaging
- Topic: Is it possible to use a PSone as a Dev Console?
- Replies: 5
- Views: 654
Re: Is it possible to use a PSone as a Dev Console?
I am using cable boot, anyone else knows more about cdrom booting.
Gameshark cdrom might work, too. Although when saying exploitable game disc, I did of course mean a game disc, not that gameshark disc.
Gameshark cdrom might work, too. Although when saying exploitable game disc, I did of course mean a game disc, not that gameshark disc.
- April 10th, 2024, 7:53 pm
- Forum: General Chat & Messaging
- Topic: Is it possible to use a PSone as a Dev Console?
- Replies: 5
- Views: 654
Re: Is it possible to use a PSone as a Dev Console?
It's all working. And can differ on comfort, speed, capacity. Without any soldering, you would need an exploitable game disc, and burn a bootloader to memory card. If you store your game/exe on memcard, too, then it could be max 100 Kbytes. I'd expect that each boot takes about 30 seconds (depending...
- April 9th, 2024, 9:01 pm
- Forum: General Chat & Messaging
- Topic: Is it possible to use a PSone as a Dev Console?
- Replies: 5
- Views: 654
Re: Is it possible to use a PSone as a Dev Console?
With or without soldering?
- April 3rd, 2024, 7:58 pm
- Forum: General Chat & Messaging
- Topic: How do PS1 ISO checksums work?
- Replies: 6
- Views: 1195
Re: How do PS1 ISO checksums work?
All psx sectors are MODE2 sectors, which are usually 930h bytes tall, and contain only 800h bytes of data (or more for audio sectors). So you need to slice your TMD file into 800h byte snippets, and insert those at the correct location in the 930h byte sectors. And then fix the ECC/EDC in the remain...
- April 3rd, 2024, 7:47 am
- Forum: General Chat & Messaging
- Topic: How do PS1 ISO checksums work?
- Replies: 6
- Views: 1195
Re: How do PS1 ISO checksums work?
Thanks -- if I may clarify, what am I looking for, or what am I looking at? Yes, what did you do exactly, and did you run into any specific problems? As by now, your question is a bit unclear. ISO is slang that might refer to "the cdrom filesystem" or "the whole disc image" or &...
- March 28th, 2024, 11:25 am
- Forum: Work Logs & Projects
- Topic: PSX BIOS Dumper
- Replies: 24
- Views: 85004
Re: PSX BIOS Dumper
One MAX232 chip should work fine for RX, TX, RTS, CTS. I don't know if RTS and CTS are needed or not, but it would be crazy not to connect them as the MAX232 has enough spare pins for that. DTR and DSR are probably not needed (or if they are: You can wire them to "always ready" state, so y...
- March 28th, 2024, 12:07 am
- Forum: Examples (Psy-Q)
- Topic: XMPlay Example + Tools
- Replies: 10
- Views: 47790
Re: XMPlay Example + Tools
The same timing problem than what? Nobody mentioned any timing problems. Anyways, the timing problems I could think of: Vblank accuracy is approx +/-0.001 minutes, but I doubt that even audiophiles could hear differences between 119.999 bpm and 120.001 bpm. PAL vs NTSC have different vblank timings....
- March 27th, 2024, 1:00 am
- Forum: PSXDEV Downloads
- Topic: [DOWNLOAD] PlayStation 1 BIOS Collection
- Replies: 135
- Views: 3882067
Re: [DOWNLOAD] PlayStation 1 BIOS Collection
Cool. Depending on what hardware you have, it might easier/faster to just check if the CRC32 of the BIOS memory does match up with known dumps. For example, in this tool http://www.problemkaputt.de/psx-diag.htm select "General Tests", and it'll compute the CRC32 and display it on the TV sc...
- March 24th, 2024, 7:45 pm
- Forum: PSXDEV Downloads
- Topic: [DOWNLOAD] PlayStation 1 BIOS Collection
- Replies: 135
- Views: 3882067
Re: [DOWNLOAD] PlayStation 1 BIOS Collection
Thanks for the part numbers, I have added them to the http://www.psxdev.net/forum/viewtopic.php?f=70&t=1065 thread
- March 22nd, 2024, 10:23 am
- Forum: Hardware
- Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
- Replies: 64
- Views: 190823
Re: [Hardware Mod] 8MB in (PU-18) Retail PSX
Okay, I've never tried to buy old chips myself, but there seem to be tons of sites offering that stuff. I don't know how reliable they are, but "can't find" is a bit of a surprise... if that happens, I would try a different search engine, and be sure to include world-wide search results, i...
- March 21st, 2024, 2:56 pm
- Forum: Hardware
- Topic: [Hardware Mod] 8MB in (PU-18) Retail PSX
- Replies: 64
- Views: 190823
Re: [Hardware Mod] 8MB in (PU-18) Retail PSX
Sounds as if you didn't read this, http://www.psxdev.net/forum/viewtopic.php?p=5457#p5457
Or is it some google-that-for-me-but-I-won't-buy-used-parts request?
Or is it some google-that-for-me-but-I-won't-buy-used-parts request?