forums.ps2dev.org

laichung · Joined: 06 May 2005 Posts: 123

I dont know this question is suitable for this forum or not. Because this is a hardware issue.

Since UMD using ISO format to store data , but UMD wavelength is different from CD/DVD media.

Do you think we can tune the lens of UMD drive and make it able to read CD/DVD media?

wulf · Joined: 13 Apr 2005 Posts: 81

first, take a look at the size of a umd.. it's even smaller than one of those mini cd's...
even if you could, there would be less space on it than on your mem card.

second, the hole on a cd is much smaller than the one required for a umd, so a dremel would be required even if it would work

third. scarily enough, some crazy guy actually tried this, and it didn't work..

in short, no, not a chance...

[/i]

Guest · Posted: Tue Jun 21, 2005 6:29 pm Post subject:

Supposedly, the first dumps of PSP UMD's were made by some group customizing optical hardware to read UMD's. I could be wrong. But in any event, it is not possible to do for anyone without expensive equipment and lots of time.

On the other hand, neither is it necessary.

almazlamaz · Joined: 14 Apr 2005 Posts: 25

no no,
there is a software for dumping UMD or firmware onto memory stick
_________________
http://www.247recovery.com - Data Recovery

Guest · Posted: Mon Jun 27, 2005 5:01 pm Post subject:

EdZ · Joined: 24 Apr 2005 Posts: 28

Guest · Posted: Mon Jun 27, 2005 8:47 pm Post subject:

jmf · Joined: 27 Jun 2005 Posts: 6

when I first saw the PSP on my hands, I tought:
"this looks like an MiniDisk...."
So... (I am suposing.... really..) If we had the possibility to write the iso (If it is smaller than 700mb) on the minidisk, and then take out the disk and put it in a UMD box... would it be readable?

FrostAie · Joined: 14 May 2005 Posts: 18

Lex · Joined: 11 May 2005 Posts: 27 Location: Germany

Could it be that MiniDisc and UMD-Audio are the same, or that it's at least possible to playback a minidisc inside the PSP, did you try this when you already open one ? (There's a new HD-MiniDisc-Format, probably the same ?)

Guest · Posted: Mon Jun 27, 2005 9:16 pm Post subject:

No, none of that is possible. UMD and MD are completely incompatible. Please search the forums for more extended discussion.

EdZ · Joined: 24 Apr 2005 Posts: 28

Guest · Posted: Mon Jun 27, 2005 11:32 pm Post subject:

silverbyte · Joined: 10 Apr 2005 Posts: 18

NO, NO and NO.

Many people ask these questions, and think just by making a MD smaller to fit the UMD that voila it'll work... but thats not the case.
the laser wavelenght used for the UMD are completly diffrent laser wavelenght used for DVD. which means that it will be nearly impossible to read diffrent medias.

ex:

UMD Laser wavelength: 660nm
UMD Recording Bit Lenght: ???

DVD Laser Wavelength: 635-650 nm
DVD Recording Bit Lenght: 0.41-0.43 �m

CD laser Wavelength: 780 nm
CD Recording Bit Lenght: ???

MD laser Wavelength: 780nm
MD Recording Bit Lenght: 0.59μm
Hi-MD Recording Bit Lenght: 0.44μm

even if you get a miniDisk cut pefectly to fit in the UMD drive, the laser wavelenght is COMPLETLY OFF, which will make it impossible for the drive to read eachother.

Just think about this.... CAN A DVD READ A CD, or can a CD READ A DVD. why can't you pop your DVD into your car CD player? (and forget about the about the CD/DVD drives you get with PC's today, those have varible wavelenghts, and Recording Bit Lenght OR they jsut use a completly diffrent laser and chipset )

IN ANYCASE im not an expert in OPTICAL technology. But i do know that the technology from a UMD differes from other OPTICAL devices (DVD,CD,MD,ETC).

jmf · Joined: 27 Jun 2005 Posts: 6

okay, by that order of ideias, a UMD Reader *should* read MDisks beacuse a DVD can read CD's (a samaller wavelenght can read a bigger one) or this is only possible in cd's and dvd's?

EdZ · Joined: 24 Apr 2005 Posts: 28

F9zDark · Joined: 02 Apr 2005 Posts: 127

They only possible way to get the PSP to read CDs and DVDs would be to:

-Modify the PSP to read UMD/CD/DVDs and incorporate the probably needed firmware additions to process CDs and DVDs.

-USB CD/DVD-ROM to use in the PSP. But with that, there would also require a host chip built into the CD/DVD-ROM since the PSP cannot operate in host mode and probably more firmware additions.

All in all, its would be a very time consuming and money consuming process. And would it even be worth it? Who the hell wants to lug around a CD/DVD-ROM? And to create CD/DVDs small enough to fit into the PSP would then limit their space capacities to the point where they would become pointless to use anyhow.

cyod · Joined: 29 Apr 2005 Posts: 36

How does the PSP keyboard work if it cannot work as a host device?

Someone really needs to get a keyboard and rig up some monitoring device to determine how its working exactly before you can make such claims about the psp being unable to act as a host.

ooPo · Posted: Wed Jun 29, 2005 1:17 pm Post subject:

Here are some conversations on that very topic:

http://forums.ps2dev.org/viewtopic.php?p=13158#13158