MM3 vs. boot disc for PSone
MM3 vs. boot disc for PSone
Well I'm trying to decide between the MM3 modchip here http://www.eurasia.nu/shop/product_info ... cts_id=276 or a PSone boot disc. I have a model SCPH-101 PSone. I heard somewhere that the MM3 cannot boot import games. I'm planning on using it for Persona (the original), Persona 2 Eternal Punishment, and Persona 2 Innocent Sin (with an english patch, all of them will be backups). Will the MM3 boot Innocent Sin since it is a japanese region backup? Or would I be better off getting a boot disc like PS-X-Change? (this would be my first mod if I went with the MM3)
Re: MM3 vs. boot disc for PSone
bump, anyone?
Re: MM3 vs. boot disc for PSone
I have never heard of a PS1 mod chip that only supported backups, and not region unlocking. That's how it is on Saturn though. One of the reviews on that link claims it plays an import Dino Crisis 2. I don't think you have anything to worry about. That chip looks like the same as mine, which was just a programed 555 timer chip or something real basic.
Re: MM3 vs. boot disc for PSone
That chip will be fine. The price combined with the amount of time it will save you in the long run is well worth it.
I used to install PSX modchips that were very similar to that timer chip above with my eyes closed back in the day. It was a nice little earner for me as well. Usually 4 solder points depending on the model. Never had any problems booting copies or imports.
The PSX copy protection system was very straightforward. It just relied on an invalid EDC/ECC sector (AKA one that is zeroed. It is impossible for conventional burners to burn this RAW at 0x00000000 without firmware modification). When a CD-R is burnt on a conventional burner it sets the EDC/ECC sector at 0x3F13xxxx (I can't remember the exact code but it starts with those four values in hex) this is correct. All the PSX looks for on bootup is that the section is 0x00000000 if it is then it goes to the region check. The timer chip just sends the code at the right time upon bootup. So regardless of the EDC/ECC sector code on the CD-R the PSX always sees 0x00000000 and thinks that it's just another retail disc.
The region check looks at the first 5 sectors (0-4) of the disc. This is in RAW format again. The modchip just tells the PSX that the disc is the same region (you need to make sure the modchip is the correct region for your PSX).
With a little PIC programmer and some time you can achieve anything really
I used to install PSX modchips that were very similar to that timer chip above with my eyes closed back in the day. It was a nice little earner for me as well. Usually 4 solder points depending on the model. Never had any problems booting copies or imports.
The PSX copy protection system was very straightforward. It just relied on an invalid EDC/ECC sector (AKA one that is zeroed. It is impossible for conventional burners to burn this RAW at 0x00000000 without firmware modification). When a CD-R is burnt on a conventional burner it sets the EDC/ECC sector at 0x3F13xxxx (I can't remember the exact code but it starts with those four values in hex) this is correct. All the PSX looks for on bootup is that the section is 0x00000000 if it is then it goes to the region check. The timer chip just sends the code at the right time upon bootup. So regardless of the EDC/ECC sector code on the CD-R the PSX always sees 0x00000000 and thinks that it's just another retail disc.
The region check looks at the first 5 sectors (0-4) of the disc. This is in RAW format again. The modchip just tells the PSX that the disc is the same region (you need to make sure the modchip is the correct region for your PSX).
With a little PIC programmer and some time you can achieve anything really
Marurun wrote:Don’t mind-shart your pants, guys