jj os 4 (FOUR)

here you get a mpc w/ JJOS 4
i am quite interested what feature this os has

http://cgi.ebay.de/Akai-MPC-1000-Black- ... 4a9e7d43c9

holy shiat!!!

I think he is referring to the fourth level JJOS rather than an actual OS 4. Not positive but if that is the case have a look at the chart

http://www7a.biglobe.ne.jp/~mpc1000/chart.htm

Best of luck

OS4 is the old name of JJ OS aka OS1.