Sale of the password of only OS1 or OS2 has not been carried out now.
Moreover, support of OS1 and OS2 was ended.
Therefore, even if a bug occurs, it does not fix.
The screen of a save is not displayed if the password of XL is not entered.
Installation of OS1 can be performed by the same method as Ver3.10.
MPC2500 JJ OS1
Version File name Size Available Upload day
5.56 mpc2500_jv556.bin 958KB Download Jan 16, 2009
 
OS2 is not installable if the password of XL is not entered.
How to Install OS2
MPC2500 JJ OS2
Version File name Size Available Upload day
1.26 mpc2500_jv126.os2 1069KB Download Nov 22, 2010

OS1 on-line manual

OS2 on-line manual