If the password of OS2XL (OS-XL) is entered, the password of OS1 and OS2 is unnecessary.
Sale of the password of only OS1 and 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.

JJ OS Comparison Chart
Name Version File name Size Available Upload day
OS1 5.00 mpc1000_jv500.bin 896KB Download May 08, 2013
OS2 1.36 mpc1000_jv136.os2 1020KB Download Jul 01, 2011

How to Install OS1. (MPC1000)

How to Install OS2. (MPC1000)

JJ OS Comparison Chart (MPC2500)
Name Version

File name

 Size Available Upload day
OS1 5.56 mpc2500_jv556.bin 958KB Download Jan 16, 2009
 
It is free software to operate a cursor of the MPC with a mouse. (Refer to video)
OS Supported jjos Version

File name

 Size Available Upload day
Windows XP/7/8.1/10 OS2XL/OS3/128XL 1.02 MPCMOUSE.zip 34KB Download Aug 23, 2014