Copy protection string of the Yaroze boot disk

Has anyone ever determined the copy protection string of the Yaroze boot disk? Clearly, it's not SCEI, SCEA, or SCEE. Rumor has it that it's "SCEW", but I haven't heard confirmation of this.

I think determining the answer could be done one of two ways:
1. Attach a logic analyzer to the SCEx data pin of a PS1. A retail PS1 would suffice.
2. Boot custom software somehow on an unmodded retail PS1. Have this custom software execute the 0x1A CD command and print out the ASCII letters. When an import legit disk is inserted on a retail system, command 0x1A will report a copy protection failure, but the SCEx string from the disk will be present. This test requires an unmodded retail system because modchips make 0x1A return the proper SCEx code, and non-retail systems report " " (20 20 20 20) in response to 0x1A.

I don't have a Yaroze boot disk nor an unmodded retail PS1 to check this.

 

I can make you a boot disc in a matter of minutes if you want. Problem is, the Yaroze will not boot a CD-R. You need a modchip. The problem then there is that the mod chip changes the license string (as you said). You can try the swap disc trick however and that SHOULD work fine

You would essentially want to just print using a simple IF statement.

if (*(char *)0xbfc7ff52=='E') // SCEE string address
... blah blah blah

I am busy at the moment, so give me a few days to code it up for you.

 

A boot disc CANT contain the boot string. You can not write to the area that its stored on the disc. So burning a CDR is completely pointless

 

My theory was to inject the Yaroze's original boot disc executable into my boot disc, and display the string on your screen upon boot by launching my executable that does just that.

 

The boot string isnt in the executable...

 

One word. FAIL.

Your teory it's wrong....

You can't burn a disc with sony SCEI\A\E boot string, else you can't create a boot disc

 

... it is in the CD-ROM wobble groove. I know. If I use the Yaroze boot disc AS a boot disc for the swap trick, it will get the point where the license data is copied where my disc (the one swapped) will display the license string or use a compare method to check all 3 states (SCEE, SCEA and SCEI).

If my theory is not going to work then. You're right. The only way then is with hardware (using a logic analyzer as Myria stated in the first post). Not software.

Actually, yes. You can.

 

Listen, how?
With retail burner and CD-R you can't.

 

I am not going to discuss this with somebody no more than a mere troll and general idiot who which can't spell correctly and comments rudely upon members.

 

OK!
Do it and demostrate me you can (the boot CD with string)! When you are done it i say to you my sorry. Since you don't want to talk how do it.

P.S.:I never called you idiot nor i'm considering you a troll! But stop talk and do it if you are true.
Sorry if i can't spell correctly, i'm not native english speaker....
google it what?
Now go in topic please!

 

You cant burn a disc with the copy protection string. If you could, there would be no need for modchips.

 

In all honesty, H4UN73D is correct. The code he provided will show the license string, so I don't know what you're on about Master991. He is incorrect about using the Yaroze executable to show the string though as Bad_AD84 stated. It is in the wobble groove as he corrected himself in his later post.

His theory about the swap disc trick may just work... I want to see what happens so please get on it!

 

Ah, the old Yaroze boot disk CD-R urban legend....

 

Yes. YOU CAN. I am not going into detail about it because IT IS ILLEGAL and I will get into trouble from Sony and many other people too.

 

If he has the original Yaroze boot disc, what he has said is pretty much exactly whats in the op's post.

He changed his idea to using the Yaroze disc as a boot disc AFTERWARDS. After being told the boot string isnt in the executable (which he was going to put in his own disc... showing he didnt know where the string was) Which is pretty much what the second point of the OP was saying.

The op quite clearly knows his stuff and mentioned it requires the original Yaroze disc.

Sorry, but this is as old as the internet and the PS1. Proof or shens.

 

Well there are two license's. The boot wobble groove license (which we were supposed to be talking about) and the executable license that is injected. I reckon he got them mixed up

 

That I did

 

Because the boot string is not in the exe and you can't create a disc with boot string .
After, he changed the idea with the swap trick

 

He mentioned the swap trick in his first post, so I am afraid you're incorrect with your statement in this post.

Go easy on the guy. He does know what he is talking about and you're all just grabbing him by the neck, grabbing it tighter and tighter.

 

Well at least someone here has some decent respect.

Anyway, let's get back on topic. I will put my theory to the test and get this Yaroze license issue out of the way.