Sry.. I don't know what exactly it does as well(or how it works)..Let me have try a though...
DJMax is a music game. And DJMax2 has the link disc function（Pic1). According to others who have real PSP, link disc function allows DJMax2 to play music of former version(So it's like DJMax 2 loads music in DJMax, but as shown in the picture, PSP uses DJMax UMD, so DJMax2 system is saved in ram?)
Pic2,Pic3 and Pic4 are following hints.
As I don't have a real PSP,I don't know the hints for when the disc is replaced correctly..
sry for broken english
DJMax is a music game. And DJMax2 has the link disc function（Pic1). According to others who have real PSP, link disc function allows DJMax2 to play music of former version(So it's like DJMax 2 loads music in DJMax, but as shown in the picture, PSP uses DJMax UMD, so DJMax2 system is saved in ram?)
Pic2,Pic3 and Pic4 are following hints.
As I don't have a real PSP,I don't know the hints for when the disc is replaced correctly..
sry for broken english