[sdiy] DIY Roland M-64C cartridge ?

[ChristianH]

Have you guys seen this?
http://wolzow.mindworks.ee/analog/jx-10-m-16c.htm

Christian



On Wed, 24 Sep 2008 19:01:31 -0700 (PDT) "Gil W." <gil_we at yahoo.com>
wrote:

> Well I just got one of these M-64C and already have a M-16C here...
> 
> I think I'll part them out and reverse engineer... Maybe make a few and sell over on ebay, that could be awesome as they are so rare and pricey to get  ! 
> 
> ;)
> 
> 
> --- On Wed, 9/24/08, Bob Weigel <sounddoctorin at imt.net> wrote:
> 
> > From: Bob Weigel <sounddoctorin at imt.net>
> > Subject: Re: [sdiy] DIY Roland M-64C cartridge ?
> > To: gil_we at yahoo.com
> > Cc: "synth-diy at dropmix.xs4all.nl" <synth-diy at dropmix.xs4all.nl>
> > Date: Wednesday, September 24, 2008, 5:05 AM
> > I've built an attempt at making an expander for the
> > unit.  It...works to 
> > the degree that you can reliably store/retrieve patches
> > from 16 banks of 
> > memory.  I used a Cypress chip..can't recall
> > number..have more 
> > downstairs.  They are a bit of a battery hog though and you
> > have to use 
> > a good sized rechargeable to really work a decent solution
> > out on that 
> > one me thinks. 
> > 
> > PROBLEM WAS when you'd try to do a bulk dump, something
> > funny would 
> > happen and I finally after building a second card and
> > having the 
> > IDENTICAL problem (It's totally predictable.  It screws
> > up the same byte 
> > of data the same way every time.  It's totally
> > consistent.  Usually bank 
> > A on an MKS70 loads fine.  Then things start gradually
> > corrupting into 
> > useless garbage) I threw my hands up.
> > 
> > But recently...I thought "Hey..MKS30 doesn't do
> > bulk dump and they need 
> > a card like this even more! "  So I tested and it
> > worked fine.   So I'm 
> > getting some packaging together to release that product.  A
> > 16 bank 
> > switch PLUS I should enable the other two data lines that
> > aren't used on 
> > the 16K cartridge interface that it uses so that it will
> > hold 64 banks 
> > of sounds!
> > 
> > MKS30 is a great machine that lacks one thing everyone
> > would like to 
> > have.  A way to store more than 64 sounds :-)  It'd be
> > swell to have a 
> > machine that could just read/archive Roland cards for that
> > matter.   
> > Hmmm.  I guess you could do it indirectly through an MKS70
> > though.  
> > Maybe just...after backing up the 70, load the sounds from
> > the cartridge 
> > which would lack the 2 bits of course if the pins are
> > compatible 
> > otherwise..hehe... then..just midi dump the data and on
> > recalling it to 
> > the 70 and loading back onto the cartridge it might work? 
> > I dunno. 
> > Haven't checked into that thought.. -Bob
> > 
> > Gil W. wrote:
> > 
> > >Is there any diagram/instructions existing for making a
> > DIY Roland cartridge ?
> > >
> > >It seems like so many Roland vintage instruments use
> > them...