Search found 198 matches

by TriMesh
February 25th, 2018, 2:29 pm
Forum: Hardware
Topic: Another gameshark thread.
Replies: 8
Views: 4718

Re: Another gameshark thread.

If it really is a V1.x Gameshark then it has the old style Datel communications port - these were not compatible with parallel ports and connected only to a special "comms link card". These are (somewhat amazingly) still available from certain sources (like EMS in Hong Kong), but you most likely don...
by TriMesh
February 22nd, 2018, 12:16 pm
Forum: Research
Topic: BIOS region check routine bypassing
Replies: 23
Views: 12957

Re: BIOS region check routine bypassing

The check was probably always intended. It appeared in the Japanese boot code almost immediately after the initial batch of consoles. EU and NTSC-U consoles probably have the code for it, but disabled. I don't know this though, it's just speculation. The check was always in the Japanese consoles, i...
by TriMesh
February 14th, 2018, 3:29 am
Forum: Research
Topic: How to dump your CDROM BIOS (Firmware)
Replies: 132
Views: 145146

Re: How to dump your CDROM BIOS (Firmware)

You may also want to remove the modchip connection for dumping. It may interfere. I have no modchip in my net yaroze. I will dig out my Arduino and see if I can find out what the problem is - my guess is that serial.print() is blocking long enough to miss the start bits coming out of the PSX and th...
by TriMesh
February 13th, 2018, 11:44 am
Forum: Research
Topic: How to dump your CDROM BIOS (Firmware)
Replies: 132
Views: 145146

Re: How to dump your CDROM BIOS (Firmware)

I will dig out my Arduino and see if I can find out what the problem is - my guess is that serial.print() is blocking long enough to miss the start bits coming out of the PSX and the code needs some buffers.
by TriMesh
February 11th, 2018, 3:09 pm
Forum: Research
Topic: How to dump your CDROM BIOS (Firmware)
Replies: 132
Views: 145146

Re: How to dump your CDROM BIOS (Firmware)

Apropos. Any news on dumping more retail psx cdrom firmwares? I had hoped that dozens of people would their firmwares... like people implementing it as "my first serial data transfer project" using an arduino or the like... but now it's more than three years and only 3-4 people managed to dump some...
by TriMesh
February 11th, 2018, 5:05 am
Forum: Hardware
Topic: PSNee further development
Replies: 550
Views: 388846

Re: PSNee further development

I have disable the ntsc fix, and now the psone works fine. So in my case i don't need the A18 and D2 point on the bios chip? I like my installs to be as clean as possible, i can make this on all psx version and post it, at least on pall versions. You will only need those points connected if you wan...
by TriMesh
February 10th, 2018, 4:28 pm
Forum: Hardware
Topic: PSNee further development
Replies: 550
Views: 388846

Re: PSNee further development

Hello from Portugal I have installed a arduino pro mini 8Mhz on a PU-18 if the last version of PSNee, and everything works ok tank you rama3 for the code. But on a PSONE i did not have any luck, again if a arduino pro mini 8Mhz, when the psone is loading the screen appears like is out off sync, scr...
by TriMesh
February 9th, 2018, 3:42 am
Forum: Research
Topic: How to dump your CDROM BIOS (Firmware)
Replies: 132
Views: 145146

Re: How to dump your CDROM BIOS (Firmware)

Yeah, that's a serious limitation. Definitely rules out using a hacked original software this way. Do you think the RAM is enough to establish 2 way communication with an external MCU? It would also have to read and control each of the used I/O. Maybe, but you would need some pretty fast IO to be a...
by TriMesh
February 8th, 2018, 1:09 pm
Forum: Research
Topic: How to dump your CDROM BIOS (Firmware)
Replies: 132
Views: 145146

Re: How to dump your CDROM BIOS (Firmware)

"Mode2: Upload 200h bytes to RAM & jump to 0040h (allows fast/custom dumping)" I wonder, is the chip fully functional in this self test mode? If it is, it'd be very interesting if instead of uploading just a small routine, we could upload a full replacement software. That software would then have t...
by TriMesh
February 7th, 2018, 6:31 pm
Forum: Miscellaneous / Off Topic
Topic: [solved] PS1 ECC is incorrect (or my code is wrong)
Replies: 8
Views: 16233

Re: [solved] PS1 ECC is incorrect (or my code is wrong)

1) Looks plausible - you don't have to do anything special because a PSX CD is entirely standards compliant (which I guess is something you would expect from one of the companies that originated the CD standard in the first place). One thing you do need to watch is that CD-ROM directories are a litt...
by TriMesh
February 6th, 2018, 2:52 pm
Forum: Hardware
Topic: 240v on SCPH-1000 Power supply?
Replies: 22
Views: 30851

Re: 240v on SCPH-1000 Power supply?

One other thing to watch is that since this is using the original transformer that was designed for 120V the peak current through the primary is going to be about twice the original value when running on 230V - the output voltage remains the same because the regulator adjusts down the duty cycle to ...
by TriMesh
February 5th, 2018, 7:03 pm
Forum: Miscellaneous / Off Topic
Topic: [solved] PS1 ECC is incorrect (or my code is wrong)
Replies: 8
Views: 16233

Re: [solved] PS1 ECC is incorrect (or my code is wrong)

Other than the directory sectors I would never patch the system area, so it doesn't matter until I move files around and change file sizes. How does the EDC/ECC bug work, and does it matter? Is it used for anti-piracy protections in any games or the system itself? Can I patch the affected sectors w...
by TriMesh
February 4th, 2018, 1:21 am
Forum: Miscellaneous / Off Topic
Topic: [solved] PS1 ECC is incorrect (or my code is wrong)
Replies: 8
Views: 16233

Re: [solved] PS1 ECC is incorrect (or my code is wrong)

Glad to hear you got your code working - but if you find incorrect EDC/ECC in the system area of a PSX disc then it's quite possible it's just corrupt so you were right not to immediately jump to blaming your code :)
by TriMesh
February 3rd, 2018, 1:24 pm
Forum: Miscellaneous / Off Topic
Topic: [solved] PS1 ECC is incorrect (or my code is wrong)
Replies: 8
Views: 16233

Re: PS1 ECC is incorrect (or my code is wrong)

Try checking sector 16 or higher - a lot of PSX CDs genuinely do have broken ECC/EDC in the system area of the disc due to a bug in Sony's mastering tool.
by TriMesh
February 2nd, 2018, 1:37 pm
Forum: General Chat / Messaging
Topic: Experience with KSM-440BAM from totalconsole?
Replies: 19
Views: 9211

Re: Experience with KSM-440BAM from totalconsole?

Thank you very much Apsley, I see a very small difference in the gray plastic part, the mold "circles" appear fainter. So does the printing on the blue sticker, hmm.. I wonder what the experts TriMesh and Shadow think about those close up shots 8-) rama3, that's what the site claims but how can you...
by TriMesh
February 1st, 2018, 1:08 pm
Forum: Members Downloads
Topic: UniROM 8.0.7bx - Added CD file browser for ROMs + .EXE
Replies: 445
Views: 340723

Re: UniROM V6 - New stuff and things.

Damn, I wasted $50 on a Japanese playstation with accessories. I bought it because I thought it was in better condition compared to the other US models that were listed thinking I was going to be able to use Unirom with it regardless. The swap method should still work as long as you have at least o...
by TriMesh
January 31st, 2018, 11:29 pm
Forum: Members Downloads
Topic: UniROM 8.0.7bx - Added CD file browser for ROMs + .EXE
Replies: 445
Views: 340723

Re: UniROM V6 - New stuff and things.

OK, I just had a look at the code, and noticed a few things to do with the region detection. 1) You are reading 0xBFC7FF52 and comparing it with 'A' and selecting NTSC mode if so - this results in the code switching to PAL mode on consoles with a Japanese ROM, which is the wrong thing to do (tm). I ...
by TriMesh
January 31st, 2018, 8:36 pm
Forum: Members Downloads
Topic: UniROM 8.0.7bx - Added CD file browser for ROMs + .EXE
Replies: 445
Views: 340723

Re: UniROM V6 - New stuff and things.

Hopefully it will be compatible in the future, because damn, I was going to use it to play backups and japanese games on this ntsc-j model. Please elaborate a little more on the swap issue. Thanks. The "nocash unlock" bit is never going to be compatible with any console with a Japanese CD controlle...
by TriMesh
January 31st, 2018, 2:16 pm
Forum: Members Downloads
Topic: UniROM 8.0.7bx - Added CD file browser for ROMs + .EXE
Replies: 445
Views: 340723

Re: UniROM V6 - New stuff and things.

I can't even boot up japanese region backups with this method. I'm not sure if it's a cart, model, or hardware issue. Which region is your console? If it's Japanese (SCPH-xxx0) or Asia (SCPH-xxx3) then the nocash unlock won't work because it's not supported by the code in the CD ROM controller chip...
by TriMesh
January 25th, 2018, 12:16 pm
Forum: General Chat / Messaging
Topic: Experience with KSM-440BAM from totalconsole?
Replies: 19
Views: 9211

Re: Experience with KSM-440BAM from totalconsole?

I haven't bought one, but I'm extremely dubious about that claim. Partly because it's an item that's been out of production for so long and partly because the official Sony service part came with the rubber shock isolators and that one apparently doesn't. From the photo it looks decent quality though.