Roland uPD650c prozessor chips.. any info

[3phase]

Hello,

I try to do some mods on my 808 ... basialy i wish to be able to go directly into wright mode without stopping the machine...

I realized the the prozessor chip that also holds the OS looks very much the same in the 606 and 808..

has anybody any info regarding the various uPD650 chips used in rolnd machines?

Have they all a diferent OS ? or is there the slight chance that 808 and 606 share the same chip and just the extrenal circuit gives the different functionality?

Thanks for any info or llinks that gives more insight..

greets
Sven