PSP motherboard info needed.

How can you tell the motherboard?
TA-082 is obvious...but what about upto TA-086?

With this new downgrader out, some of my friends will want their psp's doing for them.
I can spot a TA-082 but what about the rest... How do I identify?

 

1. The box shows a L on the baracode.
2. When , you got it, is it Firmware 2.81

I'm not sure about there

 

the letter codes only tell firmware iirc. doesnt say anything about mobo version

 

You misunderstand.
To put it simpler... how do I know if I have a TA-086.

Do 2.8 psp go higher than this... to TA-87 etc.